3.2.4.1 JS 10036-2-2007 مواصفات ملاط البناءEN 998-2-2003-مواصفة الملاط- فريدة - massa dun dun

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JS 10036-2: 2007 EN 998-2:2003 First edition

: Specification for mortar for masonry Part 2: Masonry Masonry mortar

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BRITISH STANDARD I S B ) c ( , y p o C d e l l o r t n o c n U , 6 0 0 2 T M G 8 0 : 9 5 : 0 1 3 2 n a J n o M , y g o l o r t e M d n a s d r a d n a t S r o f n o i t u t i t s n i n a d r o J , M S I J M S I J : y p o C d e s n e c i L

Specification for mort mortar ar fo for r mas mason onry ry — Part 2: Masonry mortar

The European Standard EN 998-2:2003 has the status of a Britis British h Standar Standard d

ICS 91.100.10

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BS EN 998-2:2003

BS EN 998-2:2003 I S B ) c ( , y p o C d e l l o r t n o c n U , 6 0 0 2 T M G 8 0 : 9 5 : 0 1 3 2 n a J n o M , y g o l o r t e M d n a s d r a d n a t S r o f n o i t u This British Standard, was t i t published under the authority s of the Standards Policy and n i Strategy Committee on n 30 October October 2003 a d r o J , M S I J M S I J : © BSI 30 October October 2003 y p o C d e s n e c i L ISBN 0 580 42781 1

National foreword This British Standard is the official English language version of EN 998-2:2003. It supersedes BS EN 998-2:2002 998-2:2002 which is withdrawn. EN 998-2:2003 is a candidate “harmonized” European Standard and fully takes into account the requirements of the European Commission mandate M116, Masonry and related products, given under the EU Construction Products Directive (89/106/EEC), and is intended to lead to CE marking. The date of applicability of EN 998-2:2003 as a “harmonized” European Standard, i.e. the date after which this standard may be used for CE marking purposes, is subject to an announcement in the Official Journal of the European Communities. Communities. The Commission in consultation with Member States has agreed a transition period for the co-existence of “harmonized” European Standards and their correspo nding national standard(s). It is intended that this period will comprise a period, usually nine months, after the date of availability of the European Standard, during which any required changes to national regulations are to be made, followed by a f urther period, usually of 12 months, for the i mplementation of CE marking. At the end of this co-existence pe riod, the national standard(s) will be withdrawn. EN 998-2:2003 is the subject of transitional arrangements agreed under the Commission mandate. In the UK, the corresponding national standards are: — BS 4721:1981, Specification for ready-mixed building mortars; mortars; — BS 5838-2:1980, Specification for dry packaged cementitious mixes — mixes — Part Part 2: Prepacked 2: Prepacked mortar mixes; mixes; and based on this transition period of twenty-one months, the above mentioned national standards would be withdrawn in January 2005. NOTE This date is approximate. approximate. Users of this standard standard should contact BSI Customer Services Services for confirmation of withdrawal.

The UK participation in its preparation was entrusted by Technical Committee B/519, Masonry and associated testing, to Subcommittee B/519/2, Mortar, which has the responsibility to: —

aid enquirers to understand the text;

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present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK.

—

A list of organizations represented on this subcommittee can be obtained on request to its secretary. EN 998-2 has been prepared by CEN/TC 125, Masonry, and su persedes BS 4721:1981 and BS 5838-2:1980 which will be withdrawn in due course. EN 998-2 specifies the characteristics and performance requirements fo r masonry mortar available throughout the CEN member countries. It aims to do so in product performance terms, avoiding as far as possible prescriptive requirements and all the traditional designations of masonry mortar available throughout Europe. Current products, however, will continue to be manufactured, traded and used, even though they are not referred to by name in this European Standard. The UK National Annex NA attached to this standard provides an informative commentary on the differences between EN 998-2 and BS 4721 and BS 5838-2. Nothing in this annex should be construed as specifying requirements other than those contained in the normative parts of this European Standard. If CE marking is performed, the procedures in Annex ZA will apply. The significance of the CE marking is that the product manufacturer claims compliance with the “harmonized” requirements given in the normative text of the product standard. These relate to the essential requirements of the EU Construction Products Directive. Not all product characteristics need necessarily be given on the CE marking, but those product characteristics covered by regulations in f orce in each EU Member State, where the manufacturer intends that the product will be used, do need to be stated. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of i tself confer immunity from legal obligations.

Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 33 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued.

Amendments issued since publication publication Amd. No.

Date

Comments


I S B ) c ( , y p o C d e l l o r t n o c n U , 6 0 0 2 T M G 8 0 : 9 5 : 0 1 3 2 n a J n o M , y g o l o r t e M d n a s d r a d n a t S r o f n o i t u t i t s n i n a d r o J , M S I J M S I J : y p o C d e s n e c i L

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM

EN 998-2 April 2003

I C S 9 1 .1 0 0 .1 0

Supersedes EN 998-2:2001

English version

Specification for mortar for masonry - Part 2: Masonry mortar Spécifications des mortiers pour maçonnerie - Partie 2: Mortiers de montage

Festlegungen für Mörtel im Mauerwerksbau - Teil 2: Mauermörtel

This European Standard was approved by CEN on 2 October 2002. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: rue de Stassart, 36

© 2003 CEN

B-1050 Brussels

All rights of exploitation exploitation in any form and by any means reserved worldwide for CEN national Members. Licensed by JSMo to Mr. Tamer Abu | Shahla Order # 5/Downloaded: 2012-07-10 Single-user licence only, copying and networking prohibited.

Ref. No. EN 998-2:2003 E

EN 998-2:2003 (E) I S B ) c ( , y p o C d e l l o r t n o c n U , 6 0 0 2 T M G 8 0 : 9 5 : 0 1 3 2 n a J n o M , y g o l o r t e M d n a s d r a d n a t S r o f n o i t u t i t s n i n a d r o J , M S I J M S I J : y p o C d e s n e c i L

Contents page Foreword ........................................................................... ................................................................................................................................................. ...................................................................... 3 Introduction .................................................................................................. ............................................................................................................................................ .......................................... 4 1

Scope... Scope...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ... 5

2

Normat Normative ive referenc references. es.... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ... 5

3

Terms Terms and definit definition ions s ...... ......... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ... 6

4

Materia Materials.... ls....... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ... 8

5 5.1 5.2 5.3 5.4 5.5 5.6 5.7

Require Requirement ments s ...... ......... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ..... 8 General General ........... ................ ........... ............ ........... ........... ........... ........... ........... ........... ........... ........... ............ ........... ........... ........... ........... ........... ........... ........... ........... ........... ........... ........ .. 8 Properties Properties of fresh mortar............... mortar.................... ........... ........... ........... ............ ........... ........... ........... ........... ............ ........... ........... ........... ........... ........... ........... ...... 8 Proportion Proportion of constituents constituents ........... ................. ............ ............ ........... ........... ............ ............ ............ ........... ........... ............ ............ ............ ........... ........... ........... ..... 8 Propert Properties ies of hardene hardened d mortar mortar ...... ......... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ... 9 Additio Additional nal require requirement ments s for thin layer layer mortars mortars ...... ......... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ..... 10 Reaction Reaction to fire ........... ................. ............ ........... ........... ........... ........... ............ ........... ........... ........... ........... ............ ........... ........... ........... ........... ............ ............ ........... ....... .. 10 Mixing Mixing of mortar mortar on site site ...... ......... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ..... ..... ..... 11

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Design Des ignatio ation n of of mason masonry ry mortar.... mortar....... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ..... .. 11

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Marking Marking and labell labelling. ing.... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ..... 12

8 8.1 8.2 8.3

Evalua Evaluation tion of of conform conformity ity ...... ......... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ..... .. 12 General General ........... ................ ........... ............ ........... ........... ........... ........... ........... ........... ........... ........... ............ ........... ........... ........... ........... ........... ........... ........... ........... ........... ........... ...... 12 Initial Initial type tests ........... ................. ............ ........... ........... ........... ........... ............ ............ ............ ........... ........... ........... ........... ............ ........... ........... ........... ........... ............ ...... 12 Factory Factory product production ion control control ...... ......... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ..... 13

Annex A (normative) Sampling for initial type testing and independent testing of consignments15 Annex B (informative) Use of masonry units and masonry mortar ................................................. 16 Annex C (normative) Characteristic initial shear strength of designed masonry mortars ........... 18 Annex ZA (informative) Clauses of this European Standard addressing the provisions of EU Construction Products Directive ........................................................................................... 19

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Foreword This document (EN 998-2:2003) has been prepared by Technical Committee CEN/TC125 "Masonry ", ", the Secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by October 2003, and conflicting national standards shall be withdrawn at the latest by January 2005. This document supersedes EN 998-2:2001. This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association and supports the essential requirements of the EU Construction Products Directive (89/106/EEC). It also takes into account the general rules for reinforced and unreinforced masonry in Eurocode 6. For relationship with EU Directives, see informative Annex ZA which is an integral part of this standard. In this European Standard the Annexes A and C are normative and the Annex B is informative. EN 998 Specification for mortar for masonry consists of: Part 1: Rendering and plastering mortar. Part 2: Masonry mortar.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom.


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Introduction The properties required of a mortar are related to its use. They are considered in two groups viz.: those relating to the fresh, unhardened mortar and those to the hardened mortar. To support the aim of achieving a performance-related standard, as far as practicable, the standard refers only to the properties of the product and not to its method of manufacture, except where this is unavoidable in the description of the characteristics of the product.

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1

Scope

This European Standard specifies requirements for factory made masonry mortars (bedding, jointing and pointing) for use in masonry walls, columns and partitions (e.g. facing and rendered masonry, load bearing or non-load bearing masonry structures for building and civil engineering). This European Standard defines for fresh mortars the performance related to workable life, chloride content, air content, density and correction time (for thin-layer mortars only). For hardened mortars it defines e.g. performances related to compressive strength, bond strength, density measured according to the corresponding test methods contained in separate European Standards. This European Standard provides for the evaluation of conformity of the product to this European Standard. The marking requirement for products covered by this European Standard is included. This European Standard covers masonry mortars defined in clause 3 with the exception of site made mortars. However, this standard or part of this standard may be used in conjunction with codes of applications and National specifications covering site made mortars. 2

Normative references

This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN 771, Specification for masonry units. EN 1015-1, Methods of test for mortar for masonry — Part 1: Determination of particle size distribution (by sieve analysis). EN 1015-2, Methods of test for mortar for masonry — Part 2: Bulk sampling of mortars and preparation of test mortars.

EN 1015-7, Methods of test for mortar for masonry — Part 7: Determination of air content of fresh mortar.

EN 1015-9, Methods of test for mortar for masonry — Part 9: Determination of workable life and correction time of fresh mortar.

EN 1015-10, Methods of test for mortar for masonry — Part 10: Determination of dry bulk density of hardened mortar.

EN 1015-11, Methods of test for mortar for masonry — Part 11: Determination of flexural and compressive strength of hardened mortar.

EN 1015-17, Methods of test for mortar for masonry — Part 17: Determination of water soluble chloride content of fresh mortar.

EN 1015-18, Methods of test for mortar for masonry — Part 18: Determination of water absorption coefficient due to capillary action of hardened mortar.

EN 1745:2002, Masonry and masonry products — Methods for determining design thermal values. Licensed by JSMo to Mr. Tamer Abu | Shahla Order # 5/Downloaded: 2012-07-10 Single-user licence only, copying and networking prohibited.

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EN 13501-1, Fire classification of construction products and building elements — Part 1: Classification using test data from reaction to fire tests.

3

Terms and definitions

For the purposes of this European Standard, the following terms and definitions apply. 3.1 masonry mortar

mix of one or more inorganic binders, aggregates, water, and sometimes additions and/or admixtures for bedding, jointing and pointing of masonry

3.1.1 fresh masonry mortar

mortar completely mixed and ready for use

3.2 3.2

Type Type of mas masonr onry y mortar mortar,, defin defined ed acco accordi rding ng to conc concept ept

3.2.1 designed masonry mortar

mortar whose composition and manufacturing method is chosen by the producer in order to achieve specified properties (performance concept)

3.2.2 prescribed masonry mortar

mortar made in predetermined proportions, the properties of which are assumed from the stated proportion of the constituents (recipe concept) 3.3

Type Type of maso masonry nry morta mortar, r, define defined d accord according ing to to propert properties ies a and/o nd/orr use

3.3.1 general purpose masonry mortar (G)

masonry mortar without special characteristics

3.3.2 thin layer masonry mortar (T)

designed masonry mortar with a maximum aggregate size less than or equal to a prescribed figure (see 5.5.2) 3.3.3 lightweight masonry mortar (L)

designed masonry mortar with a dry hardened density below a prescribed figure (see 5.4.5) 3.4

Type Type of maso masonry nry morta mortar, r, defin defined ed accor according ding to the the mode mode of manufac manufacture ture

3.4.1 factory made masonry mortar

mortar batched and mixed in a factory. It may be "dry mortar" which is ready-mixed, only requiring the addition of water or "wet mortar" which is supplied ready for use

3.4.2 semi-finished factory made masonry mortar

mortar described in either 3.4.2.1 or 3.4.2.2

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3.4.2.1 prebatched masonry mortar

mortar whose constituents are wholly batched in a factory, supplied to the building site and mixed there according to the manufacturer's specification and conditions

3.4.2.2 premixed lime-sand- masonry mortar

mortar whose constituents are wholly batched and mixed in a factory, supplied to the building site where further constituents specified or provided by the factory are added (e.g. cement)

3.4.3 site-made masonry mortar

mortar composed of individual constituents batched and mixed on the building site

3.5 binder

material used to hold solid particles together in a coherent mass, e.g. cement, building lime

3.6 aggregate

granular material that does not contribute to the hardening reaction of the mortar

3.7 admixture

material added in small quantities to produce specified modifications to the properties

3.8 addition

finely divided inorganic material (which is not an aggregate or binder) that may be added to mortar in order to improve or achieve special properties

3.9 bond strength

adhesion perpendicular to the bed between the masonry mortar and the masonry unit

3.10 declared value

value that a manufacturer is confident in achieving, bearing in mind the precision of test and variability of process 3.11 masonry subjected to severe exposure

masonry or elements of masonry which are subjected to saturation with water (driving rain, ground water) combined with frequent freeze/thaw-cycling due to climatic conditions, and absence of protective features 3.12 masonry subjected to moderate exposure

masonry or elements of masonry which are exposed to moisture and freeze/thaw-cycling, excluding constructions subjected to severe exposure

3.13 masonry subjected to passive exposure

masonry or elements of masonry which are not intended to be exposed to moisture and freezing conditions


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4

Materials

Raw materials shall have characteristics permitting the finished product to conform to the requirements of this standard. The manufacturer shall keep records of how suitability of materials is established. 5

Requirements

5.1

General

The requirements and properties specified in this standard shall be defined in terms of the test methods and other procedures referred to in this standard. The conformity criteria given in the following sub-clauses relate to initial type tests (see 8.2) and consignments testing (in accordance with Annex A). For production evaluation the manufacturer shall define the conformity criteria in the factory production control documentation (see 8.3). 5.2

Properties of fresh mortar

5.2.1

Workable life

The workable life shall be declared by the manufacturer. When the masonry mortar is sampled from a consignment in accordance with EN 1015-2 and tested in accordance with EN 1015-9 the workable life shall not be less than the declared value. 5.2.2

Chloride content

When relevant, the chloride content of the mortar as delivered shall be declared by the manufacturer. When sampled from a consignment in accordance with EN 1015-2 and either tested in accordance with EN 1015-17 using the procedure for determining water soluble chloride content or using a calculation based on measured chloride ion content of the constituents of the mortar, the chloride content shall not be higher than the declared value. NOTE The chloride content should not exceed 0,1 % Cl of the the mortar by dry mass. 5.2.3

Air content

When relevant for the use for which the masonry mortar is placed on the market the range in which the air content will fall shall be declared by the manufacturer. When sampled from a consignment in accordance with EN 1015-2 and tested in accordance with EN 1015-7 the air content shall fall within the declared range. For masonry mortar where porous aggregates are used the air content may alternatively be determined by testing the fresh mortar density according to EN 1015-6. 5.3

Proportion of constituents

For prescribed mortars the mix proportions by volume or by weight of all the constituents shall be declared by the manufacturer. In addition, the compressive strength shall be declared using publicly available references establishing relationship between mix proportions and compressive strength.

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5.4

Properties of hardened mortar

5.4.1

Compressive strength

For designed mortars the compressive strength of masonry mortar shall be declared by the manufacturer. The manufacturer may declare the compressive strength class in accordance with Table 1, where the compressive strength stren gth is designated by an 'M' followed by the compressive c ompressive strength class in N/mm², which it exceeds. Table 1 — Mortar classes Class

Compressive strength N/mm2

M1

M 2 ,5

M5

M 10

M 15

M 20

Md

1

2 ,5

5

10

15

20

d

d is a compressive strength greater than 25 N/mm2 declared by the manufacturer.

When the masonry mortar is sampled from a consignment in accordance with EN 1015-2 and tested in accordance with EN 1015-11 the compressive strength shall not be less than the declared compressive strength or the declared compressive strength class. It shall be declared if the air-lime content calculated as calcium hydroxide Ca(OH) 2 is equal to or higher than 50 % of the total amount of binder mass. 5.4.2

Bond strength

For designed masonry mortars intended to be used in elements subjected to structural requirements the bond strength of the mortar in combination with a masonry unit shall be declared in terms of the characteristic initial shear strength. The declaration may be made either on the basis of tests as a) below or tabulated values as b) below. The manufacturer shall declare the basis for his declaration. a) Declaration based on tests The characteristic initial shear strength of the mortar in combination with a specific type of unit in accordance with EN 771 may be based on tests on mortar sampled from a consignment in accordance with EN 1015-2 and tested with the relevant unit in accordance with EN 1052-3. The characteristic initial shear strength shall not be less than the declared value; b) Declaration based on tabulated values When no declaration is made under a) the characteristic initial shear strength of the mortar in combination with a range of unit types shall be declared by reference to Annex C. NOTE 1 Bond strength strength depends on the mortar, mortar, the masonry unit, its moisture moisture content and the workmanship. NOTE 2 Until a direct direct method of test for bond bond strength strength is available the the test for initial initial shear strength strength is to be used. 5.4.3

Water absorption

For masonry mortars intended to be used in external elements and exposed directly to the weather, the water absorption shall be declared by the manufacturer. When sampled from a consignment in accordance with EN 1015-2 and tested in accordance with EN 1015-18, the water absorption shall not be higher than the declared value. Licensed by JSMo to Mr. Tamer Abu | Shahla Order # 5/Downloaded: 2012-07-10 Single-user licence only, copying and networking prohibited.

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5.4.4

Water vapour permeability

For masonry mortars intended to be used in external elements, the water vapour permeability shall be declared by the manufacturer by reference to EN 1745:2002, Table A.12 giving tabulated values for water vapour diffusion coefficient for mortar. 5.4.5

Density (dry hardened mortar)

When relevant for the use for which the masonry mortar is placed on the market the range in which the density of dry hardened mortar will fall shall be declared by the manufacturer. When the masonry mortar is sampled from a consignment in accordance with EN 1015-2 and tested in accordance with EN 1015-10 the density shall fall within the declared range. For lightweight masonry mortars the density shall be equal to or less than 1 300 kg/m³. 5.4.6

Thermal conductivity

For masonry mortars intended to be used in elements subject to thermal requirements the manufacturer shall give design values for the thermal conductivity of the masonry mortar by reference to EN 1745:2002, Table A.12. Especially for lightweight masonry mortars, measured values according to EN 1745:2002, 4.2.2 may alternatively be declared. The manufacturer shall declare the basis for his declaration. When the masonry mortar is sampled from a consignment in accordance with EN 1015-2 and tested in accordance with EN 1745 the thermal conductivity shall be less than the declared value. 5.4.7

Durability

Until a European Standard method of test is available, the freeze/thaw resistance shall be evaluated and declared to the provisions valid in the intended place of use of the mortar. 5.5 5.5.1

Additional requirements for thin layer mortars General

Thin layer mortars shall comply with the requirements described in 5.2 and 5.4 and with the following additional requirements. 5.5.2

Aggregates

The aggregate size shall be not greater than 2 mm when the masonry mortar is sampled from a consignment in accordance with EN 1015-2 and tested in accordance with EN 1015-1. The manufacturer shall declare the maximum grain size. 5.5.3

Correction time

The correction time shall be declared. When the masonry mortar is sampled from a consignment in accordance with EN 1015-2 and tested according to EN 1015-9, the correction time shall be greater than the declared value. 5.6

Reaction to fire

The manufacturer shall declare the reaction to fire classification of the masonry mortar. Masonry mortars containing a mass or volume fraction of 1,0 % (whichever is the most onerous) of homogeneously distributed organic materials are classified as reaction to fire Class A1 without the need to test.

10



Masonry mortars containing a mass or volume fraction of > 1,0 % (whichever is the most onerous) of homogeneously distributed organic materials shall be classified in accordance with EN 13501-1 and the appropriate reaction to fire class declared. NOTE Attention is drawn to the Commission Decision 96/603/EC, as amended, in which which non-combustible masonry units containing not more than a mass or volume fraction of 1,0 % (whichever is the more onerous) of homogeneously distributed organic materials are classified as reaction to fire Class A 1 without testing.

5.7

Mixing of mortar on site

If certain types of mortar need specific site mixing equipment procedures or times, these shall be specified by the manufacturer. Mixing time is measured from the time when all constituents have been added. 6

Designation of masonry mortar

The designation shall include the following, as relevant: number and date of issue of this European Standard; name of manufacturer; a code for or the date of production; type of mortar ( 3.2, 3.3 and 3.4); workable life (5.2.1); chloride content (5.2.2); air content (5.2.3); proportion of constituents (for prescribed mortars) and relationship to compressive strength or compressive strength class (5.3); compressive strength, or compressive strength class (for designed mortars) (5.4.1); bond strength ( 5.4.2); water absorption (5.4.3); water vapour permeability (5.4.4); density (5.4.5); thermal conductivity (5.4.6); durability (5.4.7); maximum aggregate grain size (5.5.2); correction time (5.5.3); reaction to fire (5.6).


11


NOTE In the designation for a product, product, information about special qualities may be included when the mortar is intended for use in special construction.

7

Marking and labelling

The designation (see clause 6) or code identifying the designation shall be marked on the packaging, the delivery ticket or the manufacturers data sheet or other information accompanying the product. NOTE For CE marking and labelling ZA.3 applies. When annex ZA.3 requires the CE marking marking to be accompanied by the same information as required by this clause the requirements of this clause can be considered to have been met..

8

Evaluation of conformity

8.1

General

The manufacturer (or his agent) shall demonstrate compliance for his product with the requirements of this European Standard and with declared values by carrying out both initial type testing (see 8.2) and factory production control (see 8.3). Alternative methods of test to the reference methods specified in this European Standard may be adopted except for the initial type tests and in case of dispute, provided that these alternative methods satisfy the following: a) a relationship can be shown to exist between the results from the reference test and those from the alternative test; and b) the information on which the relationship is based is available. 8.2 8.2.1

Initial type tests General

After completion of the development of a new product type and before commencement of manufacture and offering for sale appropriate initial type tests shall be carried out to confirm that the properties predicted from the development meet the requirements of this standard and the values to be declared for the product. Sampling shall be carried out in accordance with annex A. Initial type tests shall also be carried out on existing products when a change in the basic materials or manufacturing procedures lead to what the manufacturer consider will change the product designation or the use of the product. In these cases the appropriate initial type tests are those for the properties which are affected or need confirming and new properties introduced by a change of use. The results of initial type tests shall be recorded. No tests need to be carried out where a declaration of tabulated values is allowed. The tests to be conducted shall be reference tests as described in this standard for the properties selected from the following list in accordance with 8.2.2 and 8.2.3, consistent with the product type's intended use.

12



NOTE For the the perform performance ance characterist characteristics ics to be determined determined in order order to address address the CE marking marking provisions, see Table ZA.1. 8.2.2

Fresh mortar properties

workable life; chloride content; air content; correction time (for thin layer mortars); aggregate size (for thin layer mortars). 8.2.3

Hardened mortar properties

compressive strength; bond strength; water absorption; water vapour permeability; density; thermal conductivity; reaction to fire (for mortars containing > 1 % of organic materials). durability 8.3 8.3.1

Factory production control General

A factory production control scheme shall be established and documented in a manual. The factory production control system shall consist of procedures for internal control of the production to ensure that such products placed on the market conform to this standard and the declared values. The internal control will consist of one or both of the following: a) Regular inspections, checks and tests and the utilization of the results to control equipment, equipment, raw or incoming materials and the production process; b) Regular inspections, checks and tests on the finished product. Records shall be maintained of the dates of tests and inspections, identification of the products tested, and the results of the tests or inspections as indicated in the quality manual. 8.3.2

Process control

The items to be addressed in the quality documents relating to the system of control chosen from 8.3.1 are given below: 1) Incoming materials Licensed by JSMo to Mr. Tamer Abu | Shahla Order # 5/Downloaded: 2012-07-10 Single-user licence only, copying and networking prohibited.

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As appropriate the manufacturer shall define the acceptance criteria of incoming materials and the procedures that he operates to ensure that these are met; 2) Production process As appropriate the relevant features of the plant and production process shall be defined giving the frequency of the inspections, checks and tests, together with the values or criteria required, both on equipment and on work in progress. The action to be taken when control values or criteria are not achieved shall be given. Weighing and measuring equipment shall be calibrated. The frequency of calibration shall be indicated. 8.3 8.3.3

Fini Finish shed ed prod produc uctt tes testt

1) Tests on the finished product As appropriate the factory production control system incorporates a sampling plan and the frequency of testing the finished product. The results of sampling and testing shall be recorded. The frequency of sampling and testing shall be determined from statistical principles, ensuring that the corresponding production conforms to the compliance criteria in this standard and the declared values for the mortar. 2) Test equipment Test equipment having a bearing on test results shall be calibrated. The calibration criteria and inspection procedures shall be given in the quality manual. 8.3.4

Traceability

As appropriate systems of traceability and control of incoming materials and the use of materials shall be given in the quality documents. The stock control system of manufactured products shall be given in the quality documents. This should include the method of treating non-conforming products.

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Annex A

(normative) Sampling for initial type testing and independent testing of consignments

A.1 General This sampling procedure shall apply for initial type testing and in the event that there is a requirement for an assessment of product compliance. For independent testing where only those properties declared by the manufacturer shall be assessed, representatives of all parties shall have the opportunity to be present at the time of sampling. The required amount of masonry mortar for one sample shall be sampled from a lot of masonry mortar of not more than 10 m3. A.2 Sampling procedure The sampling procedure shall follow one of the procedures as specified in EN 1015-2. NOTE The choice of the method of sampling will normally be dictated by the physical form of the lot in question.


15


Annex B

(informative) Use of masonry units and masonry mortar

European codes of practice have not yet been prepared dealing with architectural design and workmanship, encompassing the specification and use of units and masonry mortar to ensure that satisfactory durability in service is achieved in the finished masonry. Until such time as these codes become available, this annex entitled "Use of masonry units and masonry mortar" has been attached, relating the masonry mortar grades specified for such properties as frost resistance and soluble salts content to service conditions, including the degree of exposure and risk of saturation. Before choosing the mortar, the degree of exposure should be considered. This will include protection against saturation. "Severe", "moderate", and "passive" environment are expressions for the degree of risk of having masonry exposed to a high water content coincident with the risk of a high frequency of freezingthawing cycles due to local climatic conditions and/or to the design of the construction. The factors forming part of the environmental evaluation are temperature and moisture conditions as well as the occurrence of any aggressive substances. In the evaluation it is necessary to use local or traditional experience. The influence of possible surface coatings (e.g. painting) should be evaluated. The examples given in the following, should only be regarded as such. a) Constructions subjected to severe exposure The following examples are given for masonry or masonry elements subjected to severe exposure: Masonry near to external ground level (two courses above and below) where there is a high risk of saturation with freezing; Unrendered parapets where there is a high risk of saturation with freezing, e.g. where the parapet is not provided with an effective coping; Unrendered chimneys where there is a high risk of saturation with freezing; Cappings, copings and sills in areas where freezing conditions may occur; Free-standing boundary and screen walls where there is a high risk of saturation with freezing, for example if the wall is not provided with an effective coping; Earth retaining walls where there is a high risk of saturation with freezing for example where the wall has not been provided with an effective coping or a water proofing treatment on the retaining face;

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b) Constructions subjected to moderate exposure The following suitable measures to prevent saturation of the masonry are given: 1) protection to wall wall heads by roof overhangs or copings; 2) projecting throated sills; 3) damp-proof courses at the top and base of walls; c)

Constructions subjected to passive exposure

The following examples are given for masonry or masonry elements subjected to passive exposure: Masonry in external walls, if provided with suitable protection, the extent of which depends on climatic conditions. In some parts of Europe local experience shows that a thick layer of render provides such protection.


17


Annex C

(normative) Characteristic initial shear strength of designed masonry mortars

The characteristic initial shear strength of designed masonry mortars in combination with masonry units to EN 771 shall be as follows: 0,15 N/mm2 for General purpose and lightweight mortar; 0,3 N/mm2 for Thin layer mortar.

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Annex ZA

(informative) Clauses of this European Standard addressing the provisions of EU Construction Products Directive

ZA.1 Scope and relevant characteristics characteristics This European Standard has been prepared under Mandate M116 “Masonry and related products” given to CEN by the European Commission and the European Free Trade Association. The clauses of this European Standard shown in this annex meet the requirements of the mandate given under the EU Construction Products Directive (89/106 EEC). Compliance with these clauses confers a presumption of fitness of the masonry mortars covered by this annex for the intended uses indicated herein; reference shall be made to the information accompanying the CE marking. Other requirements and other EU Directives, not affecting the fitness of intended use(s), can be applicable to the masonry mortars falling within the scope of this European Standard.

WARNING:

NOTE In addition to any specific clauses clauses relating to dangerous substances contained contained in this Standard, there may be other requirements applicable to the products falling within its scope (e.g. transposed European legislation and national laws, regulations and administrative provisions). In order to meet the provisions of the EU Construction Products Directive, these requirements need also to be complied with, when and where they apply. An informative database of European and national provisions on dangerous substances is available at the Construction web site on EUROPA (CREATE, accessed through http://europa.eu.int).

This annex establishes the conditions for the CE marking of the masonry mortars intended for the uses indicated in Table ZA 1 and shows the relevant clauses applicable. The scope of this annex is defined by Table ZA.1.


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Table ZA.1 — Scope and relevant clauses Product:

types:

Factory made masonry mortars as covered in clause 1 of this standard, comprising the following

General purpose mortar; Thin layer mortar; Lightweight mortar. Intended use: In masonry walls, columns and partitions as covered by the Scope of this standard Essential characteristics

Requirement clauses in this European Standard

Compressive strength

Mandated levels and/or classes

Notes/ Type of declaration

5 .4 .1

None

Categories or declared values (N/mm²)

5 .3

None

Mix proportions by volume or weight

None

Declared value of initial shear strength (N/mm²) measured tabulated

None

Declared value (as a mass fraction in %)

(for desgined masonry mortars)

Proportion of constituents (for prescribed masonry mortars)

Bond strength (for desgined masonry mortars intended to be used in elements subject to structural requirements))

Contents of chlorides

5.4.2 a) based on tests b) tabulated values 5 .2 .2

(for mortars intended for reinforced masonry)

Reaction to fire

5 .6

(for masonry mortars intended to be used in elements subject to fire requirements))

Water absorption

Euroclasses A1 to F

5 .3 .3

None

Declared value 2 0,5 [kg/(m ·min )]

5 .4 .4

None

Declared tabulated water vapour diffusion coefficient

5 .4 .6

None

Declared tabulated or measured value [W/(m·K)]

5.4.7

None

Declared value, as relevant

ZA.1 Note above

None

According to ZA.3

(for masonry mortars intended to be used in external elements)

Water vapour permeability (for masonry mortars intended to be used in external elements)

Thermal conductivity/Density (for masonry mortars intended to be used in elements subject to thermal insulation requirements)

Durability Dangerous substances

Declared Euroclass

(paragraph after Figure ZA.1)

20



The requirement on a certain essential characteristic is not applicable in those Member States (MSs) where there are no regulatory requirements on that characteristic for the intended use of the product. In this case, manufacturers placing their products on the market of these MSs are not obliged to determine nor declare the performance of their products with regard to this characteristic and the option “No performance determined” (NPD) in the information accompanying the CE marking (see ZA.3) may be used. The NPD option shall not be used, however, where the characteristic is subject to a threshold level.

ZA.2 Procedure for the attestation of of conformity of masonry mortars ZA.2.1 System System of attestation attestation of conformity conformity

The system of attestation of conformity of masonry mortars indicated in Table ZA.1, in accordance with the Decision of the Commission of 14 October 1997 as given in annex III of the mandate for “Masonry and related products M 116” is shown in Table ZA.2 for the indicated intended uses and relevant levels or classes. Table ZA.2 — System of conformity Product(s)

Intended use(s)

Level(s) or class(es)

Attestation of conformity system(s)

Factory made designed masonry mortars

In walls, columns and partitions

-

2+ a

Factory made prescribed masonry mortar

In walls, columns and partitions

-

4b

a

See Directive 89/106 EEC (CPD) Annex III.2(ii), First possibility, including certification of the factory production control by an approved body. b See Directive 89/106/EEC (CPD) Annex III.2 (ii), Third possibility.

The attestation of conformity of the masonry mortars indicated in Table ZA.1 shall be based on the evaluation of conformity procedures indicated in Tables ZA.3 and ZA.4 resulting from the application of the clauses of this European Standard.


21


Table ZA.3— Assignment of evaluation of conformity tasks for designed masonry mortars T as k s

Tasks for the manufacturer

Tasks for the notified body

Content of the task

Evaluation of conformity clauses to apply

Factory production control (F.P.C)

Parameters related to all relevant characteristics of Table ZA.1

8.3

Initial type testing

All relevant characteristics of Table ZA.1

8.2

Testing of samples taken at the factory


8.3.3 1)

Certification of F.P.C. on the basis of

Initial inspection of factory and F.P.C.


8.3

Continuous surveillance, assessment and approval of F.P.C.

Parameters related to all relevant characteristics of Table ZA.1, in particular compressive strength, bond strength, contents of chlorides

8.3

Table ZA.4 — Assignment of evaluation of conformity tasks for prescribed masonry mortars T as k s

Tasks for the manufacturer

Content of the task

Evaluation of conformity clauses to apply

Factory production control (F.P.C)


8.3

Initial type testing


8.2

ZA.2.2 EC Certifica Certificate te and declaration declaration of conformity conformity

Designed masonry mortars (under system 2+): When compliance with the conditions of this annex is achieved, and once the notified body has drawn up the certificate mentioned below, the manufacturer or his agent established in the EEA shall prepare and retain a declaration of conformity (EC Declaration of conformity), which entitles the manufacturer to affix the CE marking. This declaration shall include: name and address of the manufacturer, or his authorised representative established in the EEA, and the place of production; description of the product (type, identification, use, ...), and a copy of the information accompanying the CE marking; provisions to which the product conforms (e.g. Annex ZA of this European Standard); particular conditions applicable to the use of the product, (e.g. provisions for use under certain conditions, etc);

22



the number of the accompanying factory production control certificate; name of, and position held by, the person empowered to sign the declaration on behalf of the manufacturer or his authorised representative. The declaration shall be accompanied by a factory production control certificate, drawn up by the notified body, which shall contain, in addition to the information above, the following: name and address of the notified body; the number of the factory production control certificate; conditions and period of validity of the certificate, where applicable; name of, and position held by, the person empowered to sign the certificate. Prescribed masonry mortars (under system 4): When compliance with this annex is achieved, the manufacturer or his agent established in the EEA shall prepare and retain a declaration of conformity (EC Declaration of conformity), which entitles the manufacturer to affix the CE marking. This declaration shall include: name and address of the manufacturer, or his authorised representative established in the EEA, and place of production; description of the product (type, identification, use, ...), and a copy of the information accompanying the CE marking; provisions to which the product conforms (e.g. Annex ZA of this European Standard); particular conditions applicable to the use of the product (e.g. provisions for use under certain conditions, etc.); name of, and position held by, the person empowered to sign the declaration on behalf of the manufacturer or of his authorised representative. The above mentioned declarations shall be presented in the official language or languages of the Member State in which the product is to be used. ZA.3 CE marking and labelling labelling The manufacturer or his authorised representative established within the EEA is responsible for the affixing of the CE marking. The CE marking symbol to affix shall be in accordance with Directive 93/68/EC and shall be shown on the packaging or an accompanying label or on the accompanying commercial documents, e.g. the delivery note. The following information shall accompany the CE marking symbol: identification number of the certification body (only for products under systems 2+); name or identifying mark and registered address of the producer; the last two digits of the year in which the marking is affixed; number of the EC certificate of conformity or factory production control certificate (if relevant); reference to this European Standard;


23


description of the product: generic name (see 3.3 of this standard) and intended uses in Table ZA 1 of this annex; information on the relevant essential characteristics in Table ZA.1 presented as declared values and, where relevant, level or class to declare for each essential characteristic as indicated in the column "Notes/Type of declaration" of Table ZA.1; «No performance determined » for characteristics where this is relevant. The “No performance determined” (NPD) option shall not be used where the characteristic is subject to a threshold level. Otherwise, the NPD option may be used when and where the characteristic, for a given intended use, is not subject to regulatory requirements in the Member State of destination.

Figure ZA.1 gives examples of the information to be given on the packaging, label and/or commercial documents.

24



CE conformity marking, consisting of the “CE”-symbol given in directive 93/68/EEC.

01234

AnyCo Ltd, PO Box 21, B-1050

Name or identifying mark and registered address of the producer

00 01234-CPD-00234

Last two digits of the year in which the marking was affixed

EN 998–2

No. of European Standard

Designed general purpose masonry mortar for external use in elements subject to structural requirements Compressive strength: Category M 5

Description of product

Initial shear strength: 0,15 N/mm

2

and information on regulated characteristics

(tab. value)

Contents of chloride: 0,07 % Cl Reaction to fire: Class A 1 Water absorption: 0,05 kg/(m Water vapour permeability: Thermal conductivity: (

2

0,5

·min ) 15/35

10,dry)

0,83 W/mK (tab.

value) evaluation based on provisions valid in the intended place of use of the mortar Durability (against freeze-thaw):

Figure ZA.1 — Example CE marking information

In addition to any specific information relating to dangerous substances shown above, the product should also be accompanied, when and where required and in the appropriate form, by documentation listing any other legislation on dangerous substances for which compliance is claimed, together with any information required by that legislation. NOTE European European legislati legislation on without without national derogations derogations need need not be mentioned mentioned..


25


CE conformity marking, consisting of the “CE”-symbol given in directive 93/68/EEC. Identification number of the certification body

AnyCo Ltd, PO Box 21, B-1050

Name or identifying mark and registered address of the producer

00 Last two digits of the year in which the marking was affixed Certificate number

EN 998–2

No. of European Standard

Prescribed general purpose masonry mortar for external use in elements subject to structural requirements

Description of product

Proportion of constituents (by volume):

and information on regulated characteristics

Cement 15 % Lime 10 % Aggregates 75 % Contents of chloride: 0,07 % Cl Reaction to fire: Class A 1 Water absorption: 0,1 [kg/(m Water vapour permeability: Thermal conductivity:

(

2

0,5

·min )] 15/35

0,83 W/mK (tab. value)

10,dry)

evaluation based on provisions valid in the intended place of use of the mortar Durability (against freeze-thaw):

Figure ZA.2 — Example CE marking information

In addition to any specific information relating to dangerous substances shown above, the product should also be accompanied, when and where required and in the appropriate form, by documentation listing any other legislation on dangerous substances for which compliance is claimed, together with any information required by that legislation.

26



NOTE European European legislati legislation on without without national national derogati derogations ons need need not be mentioned mentioned..


27


Bibliography EN 1052-3, Methods of test for masonry — Part 3: Determination of initial shear strength. EN 1015-6, Methods of test for mortar for masonry — Part 6: Determination of bulk density of fresh mortar.

28


BS EN 998-2:2003 I S B ) c ( , y p o C d e l l o r t n o c n U , 6 0 0 2 T M G 8 0 : 9 5 : 0 1 3 2 n a J n o M , y g o l o r t e M d n a s d r a d n a t S r o f n o i t u t i t s n i n a d r o J , M S I J M S I J : y p o C d e s n e c i L

National Annex NA (informative) (informative) Commentary on the differences between EN 998-2:2003 and existing British and European Standards for masonry mortar NA.1 Comparison of the scope of EN 998-2:2003 and BS 4721:1981

EN 998-2 specifies the constituent materials material s and performance requirements for mortar for masonry. mas onry. It is based on performance rather than prescription and in this way differs fundamentally f undamentally from BS 4721, which includes a mixture of prescriptive and performance requirements. However, EN 998-2 does refer to prescribed mortars and requires for these the declaration of: a) mix proportions by mass or volume; b) compressive strength, based on publicly available relationships between strength and mix proportions. The following relationships, based on the prescriptive mix proportions historically used in the UK codes of practices and standards can be regarded as authoritative. Table NA.1 — Mortar mix designation BS 4721:1981 – Mix designation

a

EN 998-2:2003 – Mortar class

(i)

12

(ii)

6

(iii)

4

(iv)

2

a

This designation is also used in BS 5628.

Although some of the test methods that EN 998-2 refers to may be unfamiliar, with little experience of their use internationally being available, most are relatively simple and well proven. Several test methods are the same or very similar to those in current usage, particularly those for sampling, sieve analysis, bulk density and air content. The harmonized EN 998-2:2003 replaces the non-harmonized EN 998-2:2002. It is similar in structure and general concept, but contains requirements for the following extra properties to be declared: a) water absorption; b) water vapour permeability; c) reaction to fire. The requirement to declare the workable life for thin joint mortars has been deleted. Where the same properties are required to be declared, both standards use the same test methods. NA.2 Normative references (see EN 998-2:2003, Clause 2 )

Some of the supporting test methods given in the EN 1015 series of standa rds that are referred referr ed to in EN 998-2 are different to existing ones. Therefore, the value of particular properties obtained using these will differ from those values being obtained using current British Standards. NA.3 Terms and definitions (see EN 998-2:2003, Clause 3 )

The definitions given in EN 998-2 generally clarify existing terminology and do not conflict with current definitions in existing British Standards. Licensed by JSMo to Mr. Tamer Abu | Shahla Order # 5/Downloaded: 2012-07-10 Single-user licence only, copying and networking prohibited.

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NA.4 Requirements (see EN 998-2:2003, Clause 5 ) NA.4.1 General (see EN 998-2:2003, 5.1 )

The majority of requirements in EN 998-2 are based on a system of declared values, e.g. for workable life and compressive strength, rather than compliance with stated minima or maxima. Generally no limiting or threshold values are defined. However, when relevant, there is a maximum permissible chloride content for the mortar, which is in the same order as that arising from current requirements. Conforming to the maximum permissible chloride content of 0,1 % by dry mass mass (see EN 998-2:2003, 5.2.2) is believed to be achievable for all types of masonry mortar used in the UK. Additional values for water absorption, water vapour permeability, air content, bond strength, density and thermal properties are required to t o be declared only when relevant to the intended use. Where values of properties are required to be declared, not all have to be taken from the results of tests. As an example, for water vapour permeability and for thermal conductivity a declared value is taken from an authoritative reference source s ource given in the standard. The bond strength may also be treated in this way or it may be declared on the basis of a test result if desired. The British Standard that covers the physical testing of masonry mortar, BS 4551-1, does not contain tests for bond strength, neither does it directly address chloride content, water absorption, water vapour permeability or thermal conductivity. BS 4721 does not address durability directly, whereas EN 998-2 requires it to be considered and a declaration made, based on local experience, as an interim in the absence of a European test method. NA.4.2 Workable life (see EN 998-2:2003, 5.2.1 )

EN 998-2:2003, 5.2.1 requires that the workable life be declared by the manufacturer and that the actual value be no less than the declared value, when tested in accordance ac cordance with BS EN 1015-9. This test supersedes and is similar s imilar to the equivalent test in BS 4551-1, which will be withdrawn. NA.4.3 Chloride content (see EN 998-2:2003, 5.2.2 )

EN 998-2:2003, 5.2.2 differs from BS 4721 in that it introduces a requirement for a maximum permitted chloride content of the mortar of 0,1 % by dry mass. However, BS EN 13139:2002, 13139:2002, Annex D indicates a maximum chloride content for the a ggregate of 0,15 % for plain mortar and 0,06 % for mortar with embedded metals, as guidance only, whilst ref erring back to this standard, EN 998-2:2003. NA.4.4 Air NA.4.4 Air content (see EN 998-2:2003, 5.2.3 )

EN 998-2:2003, 5.2.3 requires that the air content c ontent should be declared when relevant to the intended use, for example in exposed conditions. This contrasts with BS 4721, where minima and maxima are defined. For cement gauged lime:sand ready-mixed read y-mixed mortars, BS 4721 specifies the maximum air content as 12 % and 15 % respectively respectivel y for mortar designations (i) and (ii); and 15 % for mortar designations (iii) and (iv). For retarded ready-to-use re ady-to-use mortars, BS 4721 specifies the maximum ai r content as 18 % for all mortar designations. EN 998-2:2003, 5.2.3 requires that air content is tested in accordance with BS EN 1015-7, which details two different test methods: a) a pressure method for a declared air content of less than 20 %; b) an alcohol displacement method for a declared air content of 20 % or more.

30



The pressure method is well proven and simple and is the same in principle as that used for the determination of air content in concrete. NA.4.5 Compressive strength (see EN 998-2:2003, 5.4.1 )

Compressive strength is declared on the basis of EN 998-2:2003, 5.4.1 Table 1 but, in addition, further higher values are permissible. It is not anticipated that these higher values will be used widely, if at all, and within Table 1 there are classes approximating to the current values given in BS 4721. The specified values for compressive strength s trength in EN 998-2 differ from those in BS 4721 even though the test methods are similar. NA.4.6 Bond NA.4.6 Bond strength (see EN 998-2:2003, 5.4.2 )

Bond strength represents a new requirement, not present in previous British Standards. It is a requirement only for designed masonry mortars which are intended t o be used in elements subjected to structural requirements. Bond strength of the mortar in combination with a specific masonry unit is declared in terms of the characteristic initial shear strength of a masonry specimen determined by test or by a tabulated value. The tabulated values are unlikely to prove onerous in practice. NA.4.7 Water absorption (see EN 998-2:2003, 5.4.3 )

Water absorption, also a new requirement, is decl ared only for masonry mortars intended to be used us ed in external elements. This declaration declar ation is based on the new test given in BS EN 1015-18. Although new, the test is a simple one based on well-known principles. NA.4.8 Water vapour permeability (see EN 998-2:2003, 5.4.4 )

Water vapour permeability is a new requirement which is declared only for masonry mortars intended to be used in external elements. The decl aration is based on a tabulated value taken from BS EN 1745, Annex A, Table A12, giving values for the water vapour diffusion coefficient for mortar. hardened mortar) (see EN 998-2:2003, 5.4.5 ) NA.4.9 Density NA.4.9 Density (dry hardened

Density is only a consideration when relevant to the intended use of the mortar, in which case the range in which the density will fall has to be declared by the manufacturer. The circumstances when this will be necessary are few, and moreover, because the size of the range in which density will fall is not specified, in practice it should not be difficult to comply with this requirement. For lightweight mortars, the density has to be equal to or less than 1 300 kg/m 3. A.4.10 Thermal conductivity (see EN 998-2:2003, 5.4.6 )

Thermal conductivity represents a new requirement where design values are to be given only for masonry mortars intended to be used in elements subject to thermal requirements. The values are obtained by tabulation or by test. NA.4.11 Durability NA.4.11 Durability (see EN 998-2:2003, 5.4.7 )

Despite extensive efforts in the masonry industry to develop an appropriate durability test, none has been devised to suit the criteria of accuracy, reproducibility and an acceptable test time period. As an interim measure, the suitability of masonry mortar is based on the manufacturer’s experience of laboratory tests and/or actual service for a particular environmental condition that may be “severe”, “moderate” or “passive” (see EN 998-2:2003, Annex B). Also, it is expected that existing recommendations in BS 5628 will be considered in this context. Licensed by JSMo to Mr. Tamer Abu | Shahla Order # 5/Downloaded: 2012-07-10 Single-user licence only, copying and networking prohibited.

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NA.4.12 Additional NA.4.12 Additional requirements for thin layer mortars mortars (see EN 998-2:2003, 5.5 ) NA.4.12.1 General (see EN 998-2:2003, 5.5.1 )

EN 998-2 gives new requirements for thin layer mortars. Thin la yer mortars are required to conform to all of the criteria for fresh and hardened mortars given in EN 998-2:2003, 5.2, 5.3 and 5.4 but are also required to fulfill two further requirements (see EN 998-2:2003, 5.5.2 and 5.5.3). NA.4.12.2 Correction time (see EN 998-2:2003, 5.5.3 )

The correction time has to be greater than the declared value. Current UK experience with the test is limited but the test is relatively simple and easy to perform. ) NA.4.13 Reaction NA.4.13 Reaction to fire (see EN 998-2:2003, 5.6 EN 998-2 gives a new requirement for reaction to fire . The manufacturer has to declare the reaction to fire classification of the mortar. Mortars containing ≤ 1,0% by mass or volume, (whichever is the most onerous), of homogenously distributed organic material are classified as reaction to fire Class A1 without testing NA.4.14 Mixing of mortar on site (see EN 998-2: 2003, 5.7 )

Although primarily aimed at factory-made material, EN 998-2:2003 also addresses site mixing. The requirement in EN 998-2:2003, 5.7, states that if specific equipment, procedures or times are needed they have to be specified by the manufacturer of o f the factory-produced mortar. NA.5 Evaluation of conformity (see EN 998-2:2003 Clause 8 )

There is no equivalent of EN 998-2:2003, Clause 8 in the current British Standard on masonry mortar, BS 4721. EN 998-2:2003, Clause 8 sets out requirements for appropriate initial type testing and for the establishment and documentation of a factor y production control scheme. NA.6 Sampling for initial type testing and independent testing of consignments (see EN 998-2:2003, 998-2:2003, Annex A)

EN 998-2:2003, Annex A covers sampling and testing procedures for initial type testing. Importantly, it requires that for independent testing, representatives of all parties should have the opportunity to be present at the time of sampling. It is also a requirement requirem ent that all sampling be carried out in accordance with BS EN 1015-2 and that a sample of masonry mortar will not represent a volume exceeding 10 m3. NA.7 Use of masonry units and masonry mortar (see EN 998-2:2003, Annex B)

EN 998-2:2003, Annex B gives a basic means of assessing the suitability of a mortar for different exposure conditions. These exposure conditions are defined in three simple categories: “severe”, “moderate” and “passive”, based on temperature, moisture conditions and the presence of any aggressive substances. Examples of each of the three exposure conditions are given to aid the selection process (see EN 998-2:2003, Annex B) NOTE Further information will be available in an updated BS 5628 and DD ENV 1996-2.

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Bibliography BS 4721:1981, Specification for ready-mixed building mortars. BS 4551-1:1998, Methods of testing mortars, screeds and plasters — Part 1: Physical testing. BS 5628 (all parts) , Code of practice for use of masonry. BS EN 1015-2:1999, Methods of test for mortar for masonry — Part 2: Bulk sampling of mortars and preparation of test mortars. BS EN 1015-7:1999, Methods of test for mortar for masonry — Part 7: Determination of air content of fresh mortar. BS EN 1015-9:1999, Methods of test for mortar for masonry — Part 9: Determination of workable life and correction time of fresh mortar. BS EN 1015-18:2002, Methods of test for mortar for masonry — Part 18: Determination of water absorption coefficient due to capillary action of hardened mortar. BS EN 13139:2002, Aggregates for mortar. BS EN 1745:2002, Masonry 1745:2002, Masonry and masonry products. Methods for determining design thermal values. DD ENV 1996-2:2001 1996-2:2001 Eurocode Eurocode 6. Design of masonry structures — Part 2: Design, selection of materials and execution of masonry (together with United Kingdom National Application Document).


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BS EN 998-2:2003

I S B ) c ( , y p o C d e l l o r t n o c n U , 6 0 0 2 T M G 8 0 : 9 5 : 0 1 3 2 n a J n o M , y g o l o r t e M d n a s d r a d n a t S r o f n o i t u t i t s n i n a d r o J , M S I J M S I J : y p o BSI C d 389 Chiswick High Road e s London n e W4 4AL c i L

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3.2.4.1 JS 10036-2-2007 مواصفات ملاط البناءEN 998-2-2003-مواصفة الملاط- فريدة - massa dun dun

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