1、Designation:C77817Standard Specification forStandard Sand1This standard is issued under the fixed designation C778;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 parentheses indicates the year o
2、f 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 standard sand for use in thetesting of hydraulic cements.1.2 The valu
3、es stated in SI units are to be regarded as thestandard.1.3 Values in SI units shall be obtained by measurement inSI units or by appropriate conversion,using the Rules forConversion and Rounding given in IEEE/ASTM SI 10,ofmeasurements made in other units.1.4 This standard does not purport to address
4、 all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.1.5 This international standard was developed in accor-dance wi
5、th internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2C
6、109/C109M Test Method for Compressive Strength ofHydraulic Cement Mortars(Using 2-in.or 50-mm CubeSpecimens)C127 Test Method for Relative Density(Specific Gravity)and Absorption of Coarse AggregateC136 Test Method for Sieve Analysis of Fine and CoarseAggregatesC150 Specification for Portland CementC
7、185 Test Method for Air Content of Hydraulic CementMortarC595 Specification for Blended Hydraulic CementsC702 Practice for Reducing Samples ofAggregate to TestingSizeC1005 Specification for Reference Masses and Devices forDetermining Mass and Volume for Use in the PhysicalTesting of Hydraulic Cement
8、sE11 Specification for Woven Wire Test Sieve Cloth and TestSievesIEEE/ASTM SI 10 Standard for Use of the InternationalSystem of Units(SI):The Modern Metric System3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 20-30 sand,nstandard sand,predominantly gradedto pass a 850-m(No.20)
9、sieve and be retained on a 600-m(No.30)sieve.3.1.2 graded sand,nstandard sand,predominantly gradedbetween the 600-m(No.30)sieve and the 150-m(No.100)sieve.3.1.3 standard sand,nsilica sand,composed almost en-tirely of naturally rounded grains of nearly pure quartz,usedfor preparing mortars in the tes
10、ting of hydraulic cements.4.Requirements4.1 Sand shall meet the requirements of Table 1 with respectto grading,source of sand,and absence of undesirable airentraining characteristics.METHODS OF SAMPLING AND TESTINGSTANDARD SANDS5.Apparatus5.1 SievesThe sieves shall be standard 203-mm(8-in.)diameter,
11、full-height,wire-cloth sieves,conforming to therequirements of Specification E11,and of the following sizes:1.18-mm(No.16)425-m(No.40)850-m(No.20)300-m(No.50)600-m(No.30)150-m(No.100)75-m(No.200)5.2 Sample SplitterThe sample splitter,receptacles,andfeeder pan or hopper shall conform to the general d
12、esign1This specification is under the jurisdiction of ASTM Committee C01 onCement and is the direct responsibility of Subcommittee C01.95 on Coordination ofStandards.Current edition approved Aug.1,2017.Published August 2017.Originallyapproved in 1974.Last previous edition approved in 2013 as C778 13
13、.DOI:10.1520/C0778-17.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the
14、 end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDeve
15、lopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 requirements listed in Method A,apparatus section of PracticeC702,except that the device shall have no fewer than eightchutes having a maximum opening no g
16、reater than 13 mm,anda minimum opening at least three times the diameter of thelargest particle of sand in a sample to be split.5.3 Scales,Balances,and Reference MassesScales,balances,and reference masses shall conform to the require-ments of Specification C1005 as appropriate for the size of thesample the mass of which is to be determined.6.Sampling6.1 Sample each lot or shipment and test for the gradingrequirements in Table 1.Determine air entraining characteris-tics only when contamination of
