1、Designation:C1138M12Standard Test Method forAbrasion Resistance of Concrete(Underwater Method)1This standard is issued under the fixed designation C1138M;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A num
2、ber in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This test method covers a procedure for determining therelative resistance of concrete(including concrete overlays andimpregnated concrete)to
3、 abrasion under water(see Note 1).This procedure simulates the abrasive action of waterborneparticles(silt,sand,gravel,and other solids).NOTE1Other procedures are available for measuring abrasion resis-tance of concrete surfaces not under water.These include Test MethodsC418,C779/C779M,and C944.1.2
4、The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.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
5、 safety and health practices and determine the applica-bility of regulatory limitations prior to use.(WarningFreshhydraulic cementitious mixtures are caustic and may causechemical burns to skin and tissue upon prolonged exposure.2)2.Referenced Documents2.1 ASTM Standards:3C42/C42M Test Method for Ob
6、taining and Testing DrilledCores and Sawed Beams of ConcreteC125 Terminology Relating to Concrete and Concrete Ag-gregatesC418 Test Method for Abrasion Resistance of Concrete bySandblastingC642 Test Method for Density,Absorption,and Voids inHardened ConcreteC670 Practice for Preparing Precision and
7、Bias Statementsfor Test Methods for Construction MaterialsC779/C779M Test Method for Abrasion Resistance of Hori-zontal Concrete SurfacesC944 Test Method for Abrasion Resistance of Concrete orMortar Surfaces by the Rotating-Cutter MethodE18 Test Methods for Rockwell Hardness of Metallic Ma-terials3.
8、Terminology3.1 For definitions of terms used in this standard,refer toTerminology C125.4.Significance and Use4.1 This test method is intended to qualitatively simulate thebehavior of swirling water containing suspended and trans-ported solid objects that produce abrasion of concrete andcause pothole
9、s and related effects.4.2 This test method should provide a relative evaluation ofthe resistance of concrete to such action.4.3 The results are expected to be useful in selection ofmaterials,mixtures,and construction practices for use wheresuch action is to be expected.4.4 The test method is not int
10、ended to provide a quantitativemeasurement of the length of service that may be expectedfrom a specific concrete.5.Apparatus5.1 Rotating DeviceA drill press or similar device with achuck capable of holding and rotating the agitation paddleunder test conditions at a speed of 1200 6 100 rpm shall beus
11、ed.5.2 Test ContainerAsteel pipe,305 6 6-mm(12 614-in.)inside diameter by 450 6 25-mm(18 6 1-in.)high,fitted witha watertight steel base shall be used(see Fig.1).5.3 Agitation PaddleThe agitation paddle shall be asshown in Fig.2.5.4 Abrasive ChargesSeventy grade 1000 chrome steelgrinding balls with
12、nominal sizes as specified in Table 1 shallbe used.The steel of which the balls are made shall have aRockwell C-scale hardness of 65 6 5 as determined by TestMethods E18.The balls shall have a smooth texture and noapparent mold seam(see Note 2).NOTE2An abrasive charge meeting the requirements of Tab
13、le 1 will1This test method is under the jurisdiction of ASTM Committee C09 onConcrete and Concrete Aggregates and is the direct responsibility of SubcommitteeC09.62 on Abrasion Testing.Current edition approved Dec.1,2012.Published January 2013.Originallyapproved in 1989.Last previous edition approve
14、d in 2010 as C1138M 05(2010)1.DOI:10.1520/C1138M-12.2Section on Safety Precautions,Manual of Aggregate and Concrete Testing,Annual Book of ASTM Standards,Vol 04.02.3For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of
15、 ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.*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 have a mass of approximatel
16、y 1530 to 1900 g(3.8 to 4.2 lb).When themass of the charge approaches the lower limit,replace the undersize orunderweight balls not complying with Table 1.5.5 ScalesAplatform scale having a capacity of at least 45kg(100 lb)or more and accurate to within at least 5.0 g(0.01lb)at any point within the range used in this test shall be used.The scale shall be equipped with a suitable apparatus forsuspending the sample in its container in water from the centerof the weighing platform.5.6 Weighing Bask
