1、Designation:D587416Standard Test Methods forDetermination of the Impact Value(IV)of a Soil1This standard is issued under the fixed designation D5874;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number i
2、n parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 These test methods cover the determination of theImpact Value(IV)of a soil either in the field or a test mold,asfollows:1.1.1 Field Procedure ADet
3、ermination of IV alone,in thefield.1.1.2 Field Procedure BDetermination of IV and watercontent,in the field.1.1.3 Field Procedure CDetermination of IV,watercontent,and dry density,in the field.1.1.4 Mold ProcedureDetermination of IV of soil com-pacted in a mold,in the lab.1.2 The standard test metho
4、d,using a 4.5 kg(10 lbm)hammer,is suitable for,but not limited to,evaluating thestrength of an unsaturated compacted fill,in particular pave-ment materials,soils,and soil-aggregates having maximumparticle sizes less than 37.5 mm(1.5 in.).1.3 By using a lighter 0.5 kg(1.1 lbm)or 2.25 kg(5 lbm)hammer,
5、this test method is applicable for evaluating lowerstrength soils such as fine grained cohesionless,highly organic,saturated,or highly plastic soils having a maximum particlesize less than 9.5 mm(0.375 in.),or natural turfgrass.1.4 By using a heavier 10 kg(22 lbm)or 20 kg(44 lbm)hammer,this test met
6、hod is applicable for evaluating for hardermaterials at the top end the scales or beyond the ranges of thestandard and lighter impact soil testers.1.5 By performing laboratory test correlations for a particu-lar soil using the 4.5 kg(10 lbm)hammer,IV may be correlatedwith an unsoaked California Bear
7、ing Ratio(CBR)or may beused to infer percentage compaction.1.6 The values stated SI are to be regarded as the standard.The values stated in parentheses are given for information only.1.7 All observed and calculated values shall conform to theguidelines for significant digits and rounding established
8、 inPractice D6026.1.8 For purposes of comparing,a measured or calculatedvalue(s)with specified limits,the measured or calculatedvalue(s)shall be rounded to the nearest decimal or significantdigits in the specified limits.1.8.1 The procedures used to specify how data are collected/recorded or calcula
9、ted,in this standard are regarded as theindustry standard.In addition,they are representative of thesignificant digits that generally should be retained.The proce-dures used do not consider material variation,purpose forobtaining the data,special purpose studies,or any consider-ations for the users
10、objectives;and it is common practice toincrease or reduce significant digits of reported data to becommensurate with these considerations.It is beyond the scopeof this standard to consider significant digits used in analysismethods for engineering design.1.9 This standard does not purport to address
11、 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.NOTE1The equipment and procedures contained in this test method
12、are similar to those developed by B.Clegg in the 1970s at the Universityof WesternAustralia,Nedlands,Australia.Impact Value is also commonlyknown as Clegg Impact Value(CIV).2.Referenced Documents2.1 ASTM Standards:2D653 Terminology Relating to Soil,Rock,and ContainedFluidsD698 Test Methods for Labor
13、atory Compaction Character-istics of Soil Using Standard Effort(12 400 ft-lbf/ft3(600kN-m/m3)D1556 Test Method for Density and Unit Weight of Soil inPlace by Sand-Cone MethodD1557 Test Methods for Laboratory Compaction Character-istics of Soil Using Modified Effort(56,000 ft-lbf/ft3(2,700 kN-m/m3)D1
14、883 Test Method for California Bearing Ratio(CBR)ofLaboratory-Compacted Soils1This test method is under the jurisdiction ofASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.08 on Special andConstruction Control Tests.Current edition approved Jan.1,2016.Published
15、 January 2016.Originallyapproved in 1995.Last previous edition approved in 2007 as D5874 02(2007).DOI:10.1520/D5874-16.2For 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 th
16、e 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 D2167 Test Method for Density and Unit Weight of Soil inPlace by the Rubber Balloon MethodD2216 Test Methods for Laboratory Determination of Water(Moisture)Content of Soil and Rock by MassD2937 Test Method for Density of Soil in Place by theDrive-Cylinder MethodD3740 Prac
