1、Designation:D587402(Reapproved 2007)Standard Test Method 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 rev
2、ision.A number 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 the determination of the ImpactValue(IV)of a soil either in the field or a test mold.1.2 The standard test
3、 method,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)hammer,this testme
4、thod is applicable for evaluating lower strength soils such asfine grained cohesionless,highly organic,saturated,or highlyplastic soils having a maximum particle size less than 9.5 mm(0.375 in.).1.4 By performing laboratory test correlations for a particu-lar soil using the 4.5 kg(10 lbm)hammer,IV m
5、ay be correlatedwith an unsoaked California Bearing Ratio(CBR)or may beused to infer percentage compaction.1.5 The values stated SI are to be regarded as the standard.The values stated in parentheses are given for information only.1.6 All observed and calculated values shall conform to theguidelines
6、 for significant digits and rounding established inPractice D6026.The method used to specify how data arecollected,calculated,or recorded in this standard is not directlyrelated to the accuracy to which the data can be applied indesign or other uses or both.How one applies the resultsobtained using
7、this standard is beyond its scope.1.7 This standard may involve hazardous materials,operations,and equipment.This standard does not purport toaddress all of the safety concerns,if any,associated with itsuse.It is the responsibility of the user of this standard toestablish appropriate safety and heal
8、th practices and deter-mine the applicability of regulatory limitations prior to use.NOTE1The equipment and procedures contained in this test methodare similar to those developed by B.Clegg in the 1970s at the Universityof WesternAustralia,Nedlands,Australia.Impact Value is also commonlyknown as Cle
9、gg Impact Value(CIV).2.Referenced Documents2.1 ASTM Standards:2D653 Terminology Relating to Soil,Rock,and ContainedFluidsD698 Test Methods for Laboratory 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 inPla
10、ce 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)D1883 Test Method for California Bearing Ratio(CBR)ofLaboratory-Compacted SoilsD2167 Test Method for Density and Unit Weight of Soil inPlace by the Rubber
11、 Balloon MethodD2216 Test Methods for Laboratory Determination of Water(Moisture)Content of Soil and Rock by MassD2922 Test Methods for Density of Soil and Soil-Aggregatein Place by Nuclear Methods(Shallow Depth)(With-drawn 2007)3D2937 Test Method for Density of Soil in Place by theDrive-Cylinder Me
12、thodD3740 Practice for Minimum Requirements for AgenciesEngaged in Testing and/or Inspection of Soil and Rock asUsed in Engineering Design and ConstructionD4643 Test Method for Determination of Water(Moisture)Content of Soil by Microwave Oven HeatingD4959 Test Method for Determination of Water(Moist
13、ure)Content of Soil By Direct HeatingD6026 Practice for Using Significant Digits in GeotechnicalData3.Terminology3.1 Definitions:1This 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
14、 Tests.Current edition approved May 1,2007.Published July 2007.Originally approvedin 1995.Last previous edition approved in 2002 as D5874 02.DOI:10.1520/D5874-02R07.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book o
15、f 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 International,100 Barr Harbor Drive,P
16、O Box C700,West Conshohocken,PA 19428-2959.United States1 3.1.1 Except as listed below,all definitions are in accor-dance with Terminology D653.3.1.2 impact value(IV),nthe value expressed in units oftens of gravities(g)derived from the peak decelaration of a 4.5kg(10 lbm)instrumented compaction hammer 50 mm(1.97in.)in diameter free falling 450 mm(18 in.).3.1.3 light impact value(IV/L),nthe IV derived fromusing a 0.5 kg(1.1 lbm)mass hammer 50 mm(1.97 in.)indiameter free falling 300 mm(12 in.).3.1
