-
-
shells in coarse aggregates Tests for geometrical properties of aggregates - Determination of shell content Percentage of shells in coarse aggregates This standard is the official Italian version of the European standard EN 933-7 (March 1998 edition). The standard specifies a method for determining the content of shells in coarse aggregates. It applies to gravel or mixed aggregate containing gravel. The test method specified in this part of the present rule is applicable to grain size classes / Di where Di Š • 63 mm and 4 mm.
SUMMARY
TEXT OF RULE 91.100.15
CLASSIFICATION ICS TOPIC CLASSIFICATION CLASSIFICATION AA10D0102 PARTIALLY REPLACED
DEGREE OF cogency Registered mail
Effective
STATE OF VALIDITY '
REFERENCE PRICE EURO
TONGUE
NATIONAL
Italian PAGES Non Members 8
27,00 Euro
- Membership13,50 Euro
Tests to determine the geometric characteristics of the aggregates
UNI EN 933-7
PURSUANT TO ITALIAN
Determination of shell content Percentage of shells in coarse aggregates January 2000 Tests for geometrical properties of aggregates
Determination of shell content Percentage of shells in coarse aggregates
DESCRIPTORS
Aggregate, test, geometric characteristic, determination, percentage, gravel
CLASSIFICATION ICS
91.100.15
The standard speci fi c a method for the determination of the content of shells in coarse aggregates. It applies to gravel or mixed aggregate containing gravel. The test method speci fi ed in this part of the present rule is applicable to particle size classes d i / D the w here D the ≤ 63 mm and d the ≥ 4 mm.
SUMMARY
NATIONAL REPORTS
= EN 933-7: 1998 This standard is the of fi cial Italian language version of the European standard EN 933-7 (March 1998 edition).
INTERNATIONAL RELATIONS
UNICEMENTO - Authority for Standardization of Plumbers Binders, mortars, concretes and reinforced concrete
COMPETENT AUTHORITY
President of UNI, resolution of December 20, 1999
RATIFICATION
O O T T S I P P R O R U U S I O O T T M R R R O N N
RECONFIRMATION
UNI
• UNI - Milano 2000
Italian Organization for Uni
Reproduction prohibited. All rights reserved. No part of this document may be reproduced or distributed by
fi cation
any means, photocopying, micro fi lm or otherwise, without prior written permission of UNI.
Via Battistotti Sassi, 11B 20133 Milan, Italy
Gr. 4
Reference Nº UNI EN 933-7: 2000
Page I of IV
INTRODUCTION NATIONAL
This standard is the transposition, in Italian, the European standard EN 933-7 (edition March 1998), which takes as the status of Italian national standard. The translation was organized by UNI. The UNICEMENTO (Organization for Standardization of Plumbers Binders, mortars, concretes and reinforced concrete - via Battistotti 11B Sassi, 20133 Milano), federated entity UNI, which follows the European works on the subject, by delegation of the Central Technical Commission, approved the European project November 28, 1997, and the Italian version of the standard 2 July 1999.
In order to facilitate users, the table below shows the correspondence between the rules mentioned in point "Normative References" and the current Italian standards: EN 933-1
= UNI EN 933-1 EN 933-2
= UNI EN 933-2
The UNI are reviewed, when necessary, with the publication of new editions or updates. It is therefore important that users of these it is found to be in possession of the latest edition and any updates. The UNI are processed trying to take into account the views of all parties concerned and to reconcile every aspect con fl ittuale, to represent the real state of the matter and the necessary degree of consensus. Anyone who considers, following the application of this standard, can provide suggestions for its improvement or its adaptation to a state in evolution is requested to send their contributions to UNI, Italian National Agency for the Uni fi cation, that will keep them into account for the possible revision of the standard itself.
UNI EN 933-7: 2000
Page II of IV
INDEX
PREMISE
2
1
PURPOSE AND SCOPE
3
2
NORMATIVE REQUIREMENTS
3
3
TERMS AND DEFINITIONS
3
4
PRINCIPLE
4
5
EQUIPMENT
4
6
PREPARATION OF THE TEST PORTION
4
prospectus
1M ass of test sample
.................................................. .................................................. ............... 5
7
METHOD
5
8
CALCULATION AND EXPRESSION OF RESULTS
6
9
TEST REPORT
6
APPENDIX
A EXAMPLE OF A SHEET OF TEST DATA
8
(disclosures)
UNI EN 933-7: 2000
Page III of IV
UNI EN 933-7: 2000
Page IV of IV
Tests to determine the geometric characteristics of the aggregates
EN 933-7 EUROPEAN STANDARD
Determination of shell content Percentage of shells in coarse aggregates March 1998 Tests for geometrical properties of aggregates
EUROPEAN STANDARD Determination
of shell content
Percentage of shells in coarse aggregates Essais pour les déterminer homesteads géométriques des Granulats EUROPÉENNE RULESD etermination
de la teneur en éléments coquilliers
Pourcentage des coquilles dans les gravillons Prüfverfahren für geometrische Eigenschaften von Gesteinkörnungen
estimmung EUROPÄISCHE NORMB
des Muschelschalengehaltes
Prozentsatz von Muschelschalen in groben Gesteinkörnungen
DESCRIPTORS
Aggregate, test, geometric characteristic, determination, percentage, gravel
ICS
91.100.15
This European Standard was approved by CEN CEN members areFebruary bound to15, comply 1998. with the CEN / CENELEC that define the manner in which it must be given the status of a national standard to European standard, without making any modifications. The updated and the bibliographic reference lists us concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member.
This European Standard exists in three of fi cial versions (English, French and German). A translation in the national language, made on his own responsibility as a member of CEN and noti fi ed to the Central Secretariat has the same status as the of fi cial versions.
CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Ireland, Iceland, I taly, Luxembourg, Norway, Netherlands, Portugal, United Kingdom, Czech Republic, Spain, Sweden and Switzerland.
CEN EUROPEAN COMMITTEE ON STANDARDS European Committee for Standardization Comité Européen de Normalization Europäisches Komitee für Normung Central Secretariat: rue de Stassart, 36 - B-1050 Brussels
• 1998
CEN
All reproduction rights in any form, by any means and in all countries, are reserved for CEN national Members.
UNI EN 933-7: 2000
Page 1 of 10
PREMISE This European Standard has been prepared by Technical Committee CEN / TC 154 "Aggregates", the secretariat of which is af fi given to the BSI.
This standard is part of a series of tests to determine the geometric characteristics of the aggregates. Test methods for other properties of aggregates will be covered by parts of the following European standards: EN 932 Tests for general properties of aggregates [Test methods to determine the general properties of aggregates] EN 1097
Tests for mechanical and physical properties of aggregates [Tests to determine the mechanical and physical properties of the aggregates]
EN 1367
Tests for thermal and weathering properties of aggregates [Tests to determine the thermal properties and the degradability of the aggregates]
EN 1744
Tests for chemical properties of aggregates [Tests for chemical properties of aggregates]
It is in preparation for the European standard "Tests for fi ller aggregate used in bituminous mixtures [Tests for fi ller used in bituminous mixtures]." The other parts of EN 933 are: Part 1:
Determination of particle size distribution - Sieving method [Determination of particle size distribution - particle size analysis by sieving] Part 2:
Determination of particle size distribution - Test sieves, nominal size of apertures [Determination of particle size distribution of the control sieves, nominal size of the openings]
Part 3:
Determination of particle shape - flakiness index [Determination of granule form Coef fi cient flattening]
Part 4:
Determination of particle shape - Shape index [Determination of granule form Coef fi cient form]
Part 5: *)
Assessment of surface characteristics - Percentage of crushed and broken surfaces in coarse aggregates [Evaluation of superficial characteristics Percentage of surfaces we crushed in the coarse aggregate]
Part 6:
Assessment of surface characteristics - Flow coef fi cient of coarse aggregates [Determination of weaving / form - Coef fi cient scroll of coarse aggregates]
Part 8:
Assessment of fi nes - Sand equivalent test [Rating boundaries Try equivalent in sand]
Part 9:
Assessment of fi nes - Methylene blue test [Rating boundaries Test methylene] blue
Part 10:
Assessment of fi nes - Grading of fi llers (air jet sieving) [Determination of boundaries - Particle size of the fi llers (air jet sieving)]
This European Standard shall be given the status of a national standard, either by publication of an identical text or by noti fi cation of adoption, by September 1998 and national standards in conflict is to be withdrawn in December 1999 **) . According to the CEN / CENELEC, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Ireland, Iceland, Italy, Luxembourg, Norway, Netherlands, Portugal, United Kingdom, Czech Republic, Spain, Sweden and Switzerland.
*)
National Note - The standard was published in 1998 with the following title: "Determination of percentage of crushed and broken surfaces in coarse aggregate particles [Determination of the percentage of surfaces we crushed in coarse aggregates]."
** )
National Note - Following the decisions of the Bureau Technique of the CEN, is accepted, in well-de fi ned cases and for a transitional period fi xed by the CEN, to maintain in force domestic legislation with European standards. At the end of the transitional period, conflicting national standards shall be withdrawn.
In relation to the group of European standards, for tests to determine the geometrical characteristics of aggregates, CEN has fixed for this European Standard a transitional period expiring in December 1999.
UNI EN 933-7: 2000
Page 2 of 10
PURPOSE AND SCOPE
1
This European Standard speci fi c a method for the determination of the content of shells in coarse aggregates. It applies to gravel or mixed aggregate containing gravel. The test method speci fi ed in this part of this European Standard is applicable to particle size fractions d i / D t he , w here D the ≤ 63 mm and d the ≥ 4 mm. NoteF or size of aggregates with D > 6 3 mm and / or d < 4 mm, the test
may be performed on the fraction d i / D the
where D the ≤ 63 mm and d the ≥ 4 mm.
2
NORMATIVE REQUIREMENTS
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 publications are listed below. For dated references, subsequent amendments or revisions of any of these publications apply only when incorporated in this European Standard or revision. For undated references the latest edition of the publication to which you refer. prEN 932-2 *) Tests for general properties of aggregates - Methods for r educing laboratory samples [Test methods to determine the general properties of aggregates Methods for reducing laboratory samples]
3
prEN 932-5 *)
Tests for general properties of aggregates - Common equipment and calibration [Test methods to determine the general properties of aggregates - Common Equipment and Calibration]
EN 933-1
Tests for geometrical properties of aggregates - Determination of particle size distribution - Sieving method [Test for determining the geometric characteristics of the aggregates - Determination of particle size distribution - Particle size analysis by sieving]
EN 933-2
Tests for geometrical properties of aggregates - Determination of particle size distribution - Test sieves, nominal size of apertures [Tests to determine the geometrical properties of aggregates - Determination of particle size distribution - control sieves, nominal size of the openings]
TERMS AND DEFINITIONS
For the purposes of this European Standard apply the definitions below: aggregate size: De fi nition of aggregate in terms of dimensions of the lower sieve ( d ) a nd greater than ( D ).
3.1
his de fi NoteT
nition accepts the presence of some particles which will be retained by the upper sieve (above
sieve) and some that will pass from the lower sieve (under sieve).
size class d i / D i:P ercentage of an aggregate passing through the largest ( D t he ) t wo sieves and retained by the smaller ( d t he ).
3.2
Note
The lower limit may be zero.
3.3
test sample: Champion used completely in a single test.
3.4
constant mass: successive weighings after drying carried out at a distance of at least 1 h that do not differ by more than 0.1%.
*)
National Note - The standard was published in 1999.
UNI EN 933-7: 2000
Page 3 of 10
In many cases the constant mass can be obtained after drying of a test portion for a predetermined period in a speci fi c oven (see 5.3) at a t emperature of (110 ± 5) ° C. Laboratory tests will determine the time necessary to obtain a constant mass for particular types and sizes of samples, in relation to the drying capacity of the oven used.
3.5
shell: Outer shell of a mollusk.
4
PRINCIPLE
The test is to manually select shells and shell fragments from a coarse aggregate test sample. The shell content is determined as the ratio between the mass of the shells and fragments of shells relative to the mass of the test sample. The content of shells, SC ,I t is expressed as a percentage.
5
EQUIPMENT Unless otherwise speci fi ed, all equipment must comply with the general requirements of prEN 932-5.
5.1
Test sieves , with nominal size of the openings in accordance with EN 933-2.
5.2
Collecting vessel is cover w ith seal for the sieves.
5.3
Fan oven , thermostatically controlled to maintain a temperature of (110 ± 5) ° C, or equipment for drying the aggregate that does not cause any reduction of the particle size.
5.4
Weight scale or sized tool , of suitable capacity with accuracy of ± 0.1% of the mass to be weighed.
5.5
Trays
5.6
Brushes
5.7
Stacciatrice to sift , optional.
6
PREPARATION OF THE TEST PORTION
The sample must be reduced in accordance with the requirements of prEN 932-2. Dry the sample at (110 ± 5) ° C fi no to constant mass. Weigh and record the mass as M 0 . Sifting with appropriate test sieves, stirring vigorously suf fi cient to ensure the complete separation of particles larger than 4 mm. Discard the particles retained by the sieve test by 63 mm and those passing the test sieve 4 mm. If necessary, reduce the sample in accordance with prEN 932-2 to produce a test sample. Record the mass of the test sample as M 1 . T he mass of the test sample must be as speci fi ed in Table 1.
UNI EN 933-7: 2000 Note
Page 4 of 10
prospectus
1 Mass of test sample
more Size aggregate D
Mass of sample test (min.)
mm
kg
63
45
32
6
16
1
8
0.1
or more aggregate size D ,A ppropriate masses of test samples can be interpolated between NoteF those provided in Table 1.
The reduction of the sample should produce a greater mass of the test sample of the minimum, but not equal to an exact predetermined value. Carry out the test on each granulometric class d i / D the w here D the ≤ 2 d t he . The samples in which D > 2 d T hey must be previously separated into grain size classes, d i / D t he , where D the ≤ 2 d t he .
7
METHOD
7.1
Test samples in which
D ≤
2 d
Stretch the particles of the test sample on a flat surface and manually separate the shells and shell fragments. Determine the mass of shells and shell fragments and record their mass M 2 .
7.2
Test samples in which
D > 2 d
Separate the test sample size classes d i / D t he , w here D the ≤ 2 d the s tacciando in accordance with EN 933-1. Record the mass of each particle size class as M the a nd calculate and record as V the t he percentage by mass of each particle size class d t he/ D the i n relation to the mass of the test sample M 1. Discard any size class d t he/ D the t hat includes less than 10% of M 1. Note 1 Each size class d the/ D the r emaining, which contains less
than 100 particles, should, if required, ES-
nights recorded in the test report. Note 2 The size classes d t he/ D the c ontaining an excessive number of particles can be further reduced in accordance with prEN 932-2. Note 3 The
particle size classes may be further reduced if they are constituted by a number signi fi cativa-
mind greater than 200 particles. Record the mass M first of the particles that are to be tested in each class remaining granulometric d t he/ D the a nd separating as described in 7.1. Record the mass M s econd of shells and shell fragments in each of these size classes d t he/ D t he.
UNI EN 933-7: 2000
Page 5 of 10
8
CALCULATION AND EXPRESSION OF RESULTS
8.1
Test samples in which
D ≤
2 d
Calculate the content of shells SC i n accordance with the following equation: SC M = 2 M ( 1
) × 100
/
where:
is the mass of the test sample, expressed in grams; M 2 is the mass of shells and shell fragments, expressed in grams. Record the value of SC r ounding to the nearest whole number. M 1
8.2
Test samples in which
D > 2 d
8.2.1
not reduced particle size classes
If no class particle size was reduced, calculate the quantity of shells in accordance with the following equation:
Σ Σ
M s econd
= --------------- × 100
SC
M f irst
where:
Σ Σ
M f irst
is the sum of the masses of the particle size fractions tested, in grams; is the sum of the masses of
shells and shell fragments in each of the size classes tested, in grams. Record the value of SC r ounding
M s econd
to the nearest whole number.
8.2.2
reduced particle size classes
If one of the particle size classes was reduced, calculate the percentage by mass of shells and shell fragments in each size class and recorded as SC t he. Calculate the weighted average of the percentage of shells and fragments of conghiglia accordance with the following equation:
Σ (V the SC the ) = ------------------------------
SC
Σ
V the
where: V t he SC t he
is the percentage by mass of the particle size class in the tested sample; is the percentage by mass of shells and shell fragments in the particle size fraction the.
Record the weighted average percentage of shells and shell fragments rounding to the nearest whole number.
9
TEST REPORT
9.1
Required data
The test report must include the following information: a) reference to this European Standard; b) identi fi cation of the sample; c)
identi fi cation of the laboratory;
d) the date of receipt of the sample; e) shell content SC,r ounded to the nearest whole number; f) where applicable, the weighted average percentage.
UNI EN 933-7: 2000
Page 6 of 10
9.2
optional data
The test report can include the following information: a) name and location of the place of origin of the sample; b) description of the material and of the sample reduction process; c) visual description of the shells (for example, concave or flat); d) mass of the sample M 0; e) the mass of test portion M 1; f) mass of shells and fragments M 2; g) each granulometric class consisting of particles less than 100; h) sampling ratio, if available; i) date of the test.
UNI EN 933-7: 2000
Page 7 of 10
APPENDIX
A EXAMPLE OF A SHEET OF TEST DATA
(disclosures)
EN 933-7
Laboratory:
Identi fi cation of the sample:
Date: Operator:
M 0 =
particle size class d t he/ D the i n which
Mass M 1
g
Mass M 2
Content of shells
D the ≤ 2 d the
SC = (M 2/ M 1) × 100 (rounded to the
nearest whole number
closer) mm
g
g
%
Note - When a range of particle sizes d the/ D the was reduced, you should use an appropriate test data sheet and weighted average values dovreb-
shaft is calculated as speci fi ed in 8.2.
UNI EN 933-7: 2000
Page 8 of 10
UNI EN 933-7: 2000
Page 9 of 10
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UNI EN 933-7: 2000
Page 10 of 10
