ASTM C171-2003 Standard Specification for Sheet Materials for Curing Concrete《养护混凝土用薄板材标准规范》.pdf
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1、Designation: C 171 03Standard Specification forSheet Materials for Curing Concrete1This standard is issued under the fixed designation C 171; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in pa
2、rentheses indicates the year of last reapproval. Asuperscript 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 *1.1 This specification covers materials in sheet form usedfor cover
3、ing the surfaces of hydraulic cement concrete toinhibit moisture loss during the curing period and, in the caseof the white reflective type materials, to also reduce tempera-ture rise in concrete exposed to radiation from the sun. Thefollowing types are included:1.1.1 Curing Paper:1.1.1.1 Regular.1.
4、1.1.2 White.1.1.2 Polyethylene Film:1.1.2.1 Clear.1.1.2.2 White Opaque.1.1.3 White-Burlap-Polyethylene Sheet.1.2 The values stated in SI units are to be regarded as thestandard. Inch-pound units are provided in parentheses forinformation only.NOTE 1This specification does not cover materials such as
5、 burlap,cotton mats, or rugs used with additional applications of water to maintaina water-saturated environment on such surfaces. Procedures employingthese materials are discussed in ACI 308R. Sheet materials havingadditional characteristics such as insulating properties and the ability tocarry add
6、itional water to the curing region are commercially available butare not currently addressed in this specification.1.3 The text of this standard references notes and footnoteswhich provide explanatory material. These notes and footnotesshall not be considered as requirements of the standard.2. Refer
7、enced Documents2.1 ASTM Standards:D 829 Test Methods for Wet Tensile Breaking Strength ofPaper and Paper Products2D 4397 Specification for Polyethylene Sheeting for Con-struction, Industrial and Agricultural Applications3E 96 Test Methods for Water Vapor Transmission of Mate-rials2E 1347 Test Method
8、 for Color and Color-Difference Mea-surement by Tristimulus (Filter) Colorimetry42.2 ACI Standard:ACI 308R Standard Practice for Curing Concrete53. Terminology3.1 Definitions:3.1.1 curing paper, na composite consisting of two layersof kraft paper bonded together with a bituminous material andreinfor
9、ced with fiber, used for covering the surface of freshconcrete to inhibit moisture loss during the curing period.4. Ordering Information4.1 The purchaser shall specify the type of curing materialto be furnished under this specification.4.2 Lengths and widths of the rolls or mats of the sheetmaterial
10、s furnished shall be as agreed upon between thepurchaser and seller.5. Performance Requirements5.1 The sheet materials furnished under this specificationshall be tough, strong, resilient, and capable of withstandingnormal job use without puncturing or tearing.5.2 The sheet material shall exhibit a w
11、ater vapor transmis-sion rate (WVTR) of no more than 10 g/m2in 24 h when testedaccording to Procedure E of Test Methods E 96.5.3 The daylight reflectance of the white side of whitecuring paper shall be at least 50 % when measured by TestMethod E 1347. The daylight reflectance of white polyethylenefi
12、lm and the polyethylene side of white burlap-polyethylenesheet shall be at least 70 % when measured according to TestMethod E 1347.NOTE 2Daylight reflectance is total luminous reflectance factor, CIEtristimulus value Y for the CIE 1931 (2) standard observer and CIEstandard illuminant C or D65.6. Phy
13、sical Requirements6.1 Curing Paper shall consist of two sheets of kraft papercemented together with a bituminous material in which are1This specification is under the jurisdiction of ASTM Committee C09 onConcrete and Concrete Aggregates and is the direct responsibility of SubcommitteeC09.22 on Mater
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