1、Designation:C779/C779M12Standard Test Method forAbrasion Resistance of Horizontal Concrete Surfaces1This standard is issued under the fixed designation C779/C779M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revis
2、ion.A number in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This test method covers three procedures for determin-ing the relative abrasion resistance of horizontal concretesurfaces.The proce
3、dures differ in the type and degree ofabrasive force they impart,and are intended for use indetermining variations in surface properties of concrete af-fected by mixture proportions,finishing,and surface treatment.They are not intended to provide a quantitative measurement ofthe length of service th
4、at may be expected from a specificsurface.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.Within the text,theinch-pound units are shown in brackets.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used in
5、dependently of each other.1.3 This standard does not purport to address 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
6、 to use.(WarningFreshhydraulic cementitious mixtures are caustic and may causechemical burns to skin and tissue upon prolonged exposure.2)NOTE1Other procedures are available for measuring the abrasionresistance of concrete surfaces in addition to the three procedurescontained in this test method.Con
7、sideration should be given to TestMethods C944 and C418.The test method most closely representingservice conditions should be used.2.Referenced Documents2.1 ASTM Standards:3C125 Terminology Relating to Concrete and Concrete Ag-gregatesC418 Test Method for Abrasion Resistance of Concrete bySandblasti
8、ngC670 Practice for Preparing Precision and Bias Statementsfor Test Methods for Construction MaterialsC944 Test Method for Abrasion Resistance of Concrete orMortar Surfaces by the Rotating-Cutter Method3.Terminology3.1 For definitions of terms used in this standard,refer toTerminology C125.4.Signifi
9、cance and Use4.1 The three test methods provide simulated abrasionconditions,which can be used to evaluate the effects onabrasion resistance of concrete,concrete materials,and curingor finishing procedures.They may also be used for qualityacceptance of products and surface exposed to wear.They areno
10、t intended to provide a quantitative measurement of length ofservice.4.2 The equipment used by each of these procedures isportable and thus suitable for either laboratory or field testing.The three procedures determine the relative wear of concretesurfaces as follows:4.2.1 Procedure AThe revolving-d
11、isk machine operatesby sliding and scuffing of steel disks in conjunction withabrasive grit.4.2.2 Procedure BThe dressing-wheel machine operatesby impact and sliding friction of steel dressing wheels.4.2.3 Procedure CThe ball-bearing machine operates byhigh-contact stresses,impact,and sliding fricti
12、on from steelballs.NOTE2Diagrams of three machines meeting these specifications areshown in Fig.1,Fig.2,and Fig.3.41This test method is under the jurisdiction of ASTM Committee C09 onConcrete and Concrete Aggregatesand is the direct responsibility of SubcommitteeC09.62 on Abrasion Testing.Current ed
13、ition approved Dec.1,2012.Published December 2012.Originallyapproved in 1974.Last previous edition approved in 2010 as C779 05(2010).DOI:10.1520/C0779_C0779M-12.2Section on Safety Precautions,Manual of Aggregate and Concrete Testing,Annual Book of ASTM Standards,Vol 04.02.3For referenced ASTM standa
14、rds,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.4The sole source of supply of these machines known to the committee at thistime is White Mach
15、ine Co.,9591YorkAlpha Dr.,North Royalton,OH 44133;SpiritFabricating,Ltd.,9260 Valley View Rd.,Macedonia,OH 44056.If you are awareof alternative suppliers,please provide this information to ASTM InternationalHeadquarters.Your comments will receive careful consideration at a meeting of theresponsible
16、technical committee,1which you may attend.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 FIG.1 Revolving Disks Abrasion Test MachineFIG.2 Dressing Wheel Abrasion Test MachineC779/C779M 122 PROCEDURE AREVOLVING DISKS5.Apparatus5.1 The function of the apparatus is dependent upon theabrasive action of the flat faces of three 60-mm(238-in.)diameter,cold-rolled steel revolvi