1、Designation:C17116Standard Specification forSheet Materials for Curing Concrete1This standard is issued under the fixed designation C171;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 parenthese
2、s indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 This specification covers materials in sheet form usedfor covering the su
3、rfaces 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.1.1.1.2 White.1
4、.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 asstandard.No other units of measurement are included in thisstandard.NOTE1This specification does not cover materials such as burlap,cotton mats,or ru
5、gs used with additional applications of water to maintaina water-saturated environment on such surfaces.Sheet materials havingadditional characteristics such as insulating properties and the ability tocarry additional water to the curing region are commercially available butare not currently address
6、ed 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.Referenced Documents2.1 ASTM Standards:2C156 Test Method for Water Loss from a Mortar SpecimenThr
7、ough Liquid Membrane-Forming Curing Compoundsfor ConcreteD829 Test Methods for Wet Tensile Breaking Strength ofPaper and Paper Products(Withdrawn 2009)3D4397 SpecificationforPolyethyleneSheetingforConstruction,Industrial,and Agricultural ApplicationsE96/E96M Test Methods for Water Vapor Transmission
8、 ofMaterialsE1347 Test Method for Color and Color-Difference Mea-surement by Tristimulus Colorimetry3.Terminology3.1 Definitions:3.1.1 curing paper,na composite consisting of two layersof kraft paper bonded together with a bituminous material andreinforced with fiber,used for covering the surface of
9、 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 sheetmaterials furnished shall be as agreed upon between thepu
10、rchaser 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 water vapor transmis-sion rate(WVTR)of no more than 10
11、 g/m2in 24 h when testedaccording to Test Methods E96/E96M using the Water Methodin the environment(test cabinet)specified in Test MethodC156.5.3 The daylight reflectance of the white side of whitecuring paper shall be at least 50%when measured by TestMethod E1347.The daylight reflectance of white p
12、olyethylenefilm and the polyethylene side of white burlap-polyethylenesheet shall be at least 70%when measured according to TestMethod E1347.1This specification is under the jurisdiction of ASTM Committee C09 onConcrete and Concrete Aggregates and is the direct responsibility of SubcommitteeC09.22 o
13、n Materials Applied to New Concrete Surfaces.Current edition approved Feb.1,2016.Published March 2016.Originallyapproved in 1942.Last previous edition approved in 2007 as C17107.DOI:10.1520/C0171-16.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at
14、 serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM Int
15、ernational,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 NOTE2Daylight reflectance is total luminous reflectance factor,CIEtristimulus value Y for the CIE 1931(2)standard observer and CIEstandard illuminant C or D65.6.Physical Requirements6.1 Curing Paper shall con
16、sist of two sheets of kraft papercemented together with a bituminous material in which areembedded cords or strands of fiber running in both directionsand not more than 32 mm apart.The paper shall be light incolor,shall be free of visible defects,and shall have a uniformappearance.White paper shall have a white surface on at leastone side.6.1.1 The tensile strength of curing paper shall be no lessthan 5.25 kN/m of width in the machine direction and 2.62kN/m of width in the cross direction when m
