Designati Desi gnation: on: C 171 – 07
Standard Specification for
Sheet Materials for Curing Concrete 1 This standard is issued under the fixed designation C 171; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript supers cript epsilon (e) indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the Department of Defense.
1. Scope Scope* *
D 4397 Specificati Specification on for Polye Polyethyl thylene ene Shee Sheeting ting for Construction, Industrial, and Agricultural Applications E 96/E 96M Test Methods for Water Vapor Transmission of Materials E 1347 Test Method for Color and Color-Difference Measurement by Tristimulus Colorimetry Standard: 2.2 ACI Standard: ACI 308R Standard Practice for Curing Concrete 3
1.1 This specificati specification on covers materials materials in sheet form used for cov coveri ering ng the sur surfac faces es of hyd hydrau raulic lic cem cement ent con concre crete te to inhibit moisture loss during the curing period and, in the case of the white reflective type materials, to also reduce temperature rise in concrete exposed to radiation from the sun. The following types are included: 1.1.1 Curing Paper : 1.1.1.1 Regular Regular.. 1.1.1.2 Whit White. e. 1.1.2 Polyethylene Film: 1.1.2.1 Clear Clear.. 1.1.2.2 Whit Whitee Opaque. 1.1.3 White-Burlap-Polyethylene Sheet . 1.2 The values values stated in SI units are to be regarded regarded as the standard. stand ard. Inch-pound Inch-pound unit unitss are provi provided ded in pare parenthes ntheses es for information only. ` , ` , , ` ` ` ` ` , , , , ` , ` , , ` , , , , ` ` ` ` ` , , ` , , ` , ` , , ` -
3. Terminology 3.1 Definitions: 3.1.1 curing paper , n—a composite consisting of two layers of kraft paper bonded together with a bituminous material and reinforced with fiber, used for covering the surface of fresh concrete to inhibit moisture loss during the curing period. 4. Ordering Information Information 4.1 The purchaser purchaser shall specify the type of curin curing g mate material rial to be furnished under this specification. 4.2 Len Length gthss and widths widths of the rolls rolls or mats of the sheet sheet materi mat erials als fur furnis nished hed sha shall ll be as agr agreed eed upo upon n bet betwee ween n the purchaser and seller.
NOTE 1—This specification does not cover materials such as burlap, cotton mats, or rugs used with additional applications of water to maintain a water water-satur -saturated ated environment on such surfac surfaces. es. Procedures employing thesee mat thes materi erials als are disc discusse ussed d in in ACI 308R. 308R. Sheet Sheet mat materi erials als havi having ng additional characteristics such as insulating properties and the ability to carry additional water to the curing region are commercially available but are not currently addressed in this specification.
5. Performance Requirements 5.1 The sheet materials materials furnished furnished under this speci specificati fication on shall be tough, strong, resilient, and capable of withstanding normal job use without puncturing or tearing. 5.2 The sheet material shall exhibit exhibit a water vapor transmission rate (WVTR) of no more than 10 g/m 2 in 24 h when tested accord acc ording ing to Test Met Method hodss E 96/E 96/E 96M using using the Wate aterr Method Met hod in the env enviro ironme nment nt (te (test st cab cabine inet) t) spe specifi cified ed in Test Method C Method C 156. 156. 5.3 The day daylig light ht refl reflect ectanc ancee of the white sid sidee of whi white te curing paper shall be at least 50 % when measured by Test Method E Method E 1347. 1347. The daylight reflectance of white polyethylene film and the polye polyethyle thylene ne side of white burlap-polye burlap-polyethyle thylene ne sheet shall be at least 70 % when measured according to Test Method E Method E 1347. 1347.
1.3 The text of this standard standard references references notes and footnotes footnotes which provide explanatory material. These notes and footnotes shall not be considered as requirements of the standard. 2. Referenced Documents 2.1 ASTM Standards: 2 C 156 Tes Testt Me Meth thod od fo forr Wat ater er Re Rete tent ntio ion n by Li Liqu quid id Membrane-Forming Curing Compounds for Concrete D 829 Test Methods for Wet Tensile Breaking Strength of Paper and Paper Products
1 Thiss spe Thi specific cificatio ation n is und under er the juri jurisdi sdictio ction n of ASTM Com Commit mittee tee C09 on Concrete and Concre Concrete Concrete te Aggreg Aggregates ates and is the direct responsibility responsibility of Subcommittee Subcommittee C09.22 C09.2 2 on Materials Applied Applied to New Concrete Surfaces. Current edition approved Nov. 1, 2007. Published December 2007. Originally approved in 1942. Last previous edition approved in 2003 as C 171–03. 2 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@
[email protected] astm.org. g. For For Annual Annual Book of ASTM volume information, refer to the standard’s Document Summary page on Standards volume Standards the ASTM website website..
NOTE 2—Dayl 2—Daylight ight reflectance is total luminous reflectance reflectance factor factor,, CIE
3
Available from American Concrete Institute (ACI), P.O. Box 9094, Farmington Hills, MI 48333-9094, http://www.aci-int.org.
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C 171 – 07 6.2.1 The nominal thickness thickness of polyethylene polyethylene film shal shalll be no les lesss tha than n 0.1 0.10 0 mm (4 mil mil)) as determin determined ed acc accord ording ing to Specification D Specification D 4397 . 4397 . Thickness at any point shall be no less than 0.075 mm (0.0030 in.). 6.2.2 The impact resistance and mechanical mechanical properties shall be as required in Specification D 4397. 4397. Burlap-Pol p-Polyeth yethylene ylene Sheet Sheeting ing shall 6.3 White Burla shall con consis sistt of 2 2 burlap weighing not less than 305 g/m (9 oz./yd ) extrusion coated coat ed on one side with white opaqu opaquee polye polyethyle thylene ne at least 0.10 mm (0.004 in.) thick and meeting the other requirements of 6.2 6. 2. The polyethylene material shall be securely bonded to the burlap so that there will be no separation of the materials during handling and curing of the concrete.
tristimulus tristimu lus value Y for the CIE 1931 (2° (2°)) sta standa ndard rd obse observe rverr and CIE standard illuminant C or D65.
6. Physical Requirements Requirements 6.1 Curing Paper shall consist of two two sheets of kraft paper paper cemented together with a bitu cemented bitumino minous us mate material rial in which are embedded cords or strands of fiber running in both directions and not more than 32 mm (1 1 ⁄ 4 in.) apart. The paper shall be light in color, shall be free of visible defects, and shall have a uniform appearance. White paper shall have a white surface on at least one side. 6.1.1 The tensile tensile strength strength of curin curing g paper shall be no less than 5.25 kN/m of width (30 lbf/in. of width ) in the machine direction and 2.62 kN/m of width (15 lbf/in. of width) in the cross direction direction when meas measured ured according according to Test Meth Methods ods D 829. 829. 6.2 Polyethylene Film shall consist of a single sheet manufactured from polyethylene resins. It shall be free of visible defects and shall have a uniform appearance. The clear type shall be essentially transparent. The opaque film shall contain white pigment.
7. Samp Sampling ling 7.1 Samples Samples of film or she sheeti eting ng suf sufffici icient ent to det determ ermine ine conformance with this specification shall be taken at random. 8. Keyw Keywords ords 8.1 concrete curing materials; polyethylene polyethylene film; sheet material ter ial for cur curing ing con concre crete; te; cur curing ing pap paper; er; whi white te bur burlap lap-polyethylene sheet
SUMMARY OF CHANGES Committeee C09 has ident Committe identified ified the loca location tion of sele selected cted changes to this specificatio specification n since the last issue, C 171 – 03, that may impact the use of this specification. (Approved November 1, 2007) (1) Revised 5.2 to clarify test conditions to be used for Test Methods E Methods E 96/E 96M. 96M. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn. Your comments comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. ` , ` , , ` ` ` ` ` , , , , ` , ` , , ` , , , , ` ` ` ` ` , , ` , , ` , ` , , ` -
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Copyright ASTM International Provided by IHS under license with ASTM No reproduction or networking permitted without license from I HS
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