1、Designation:D7370/D7370M14(Reapproved 2021)Standard Test Method forDetermination of Relative Density and Absorption of Fine,Coarse,and Blended Aggregate Using Combined VacuumSaturation and Rapid Submersion1This standard is issued under the fixed designation D7370/D7370M;the number immediately follow
2、ing the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers t
3、he determination of relativedensity and absorption of fine aggregates by Method A andcoarse and blended aggregates by Method B.1.2 A multi-laboratory precision and bias statement forcoarse and combined aggregate tests in this standard has notbeen developed at this time.Therefore,this standard should
4、 notbe used for acceptance or rejection of coarse and combinedaggregate materials for purchasing purposes.1.3 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system are not necessarily exact equivalents;therefore,toensure con
5、formance with the standard,each system shall beused independently of the other,and values from the twosystems shall not be combined.Some values have only SI unitsbecause inch-pound equivalents are not used in practice.1.4 This standard does not purport to address all of thesafety concerns,if any,ass
6、ociated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accor-dance with internationally reco
7、gnized 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:2C29/C29M Test Method for
8、 Bulk Density(“Unit Weight”)and Voids in AggregateC127 Test Method for Relative Density(Specific Gravity)and Absorption of Coarse AggregateC128 Test Method for Relative Density(Specific Gravity)and Absorption of Fine AggregateC136/C136M Test Method for Sieve Analysis of Fine andCoarse AggregatesC670
9、 Practice for Preparing Precision and Bias Statementsfor Test Methods for Construction MaterialsC702/C702M Practice for Reducing Samples of Aggregateto Testing SizeD75/D75M Practice for Sampling AggregatesD3666 Specification for Minimum Requirements for Agen-cies Testing and Inspecting Road and Pavi
10、ng MaterialsD4753 Guide for Evaluating,Selecting,and Specifying Bal-ances and Standard Masses for Use in Soil,Rock,andConstruction Materials TestingE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method3.Summary of Test Method3.1 Sufficient aggregate sample
11、is dried to constant mass.For each test,two representative dry aggregate samples of thesame material are selected for testing.One sample is evacuatedin a vacuum chamber inside a plastic bag and opened underwater for rapid saturation of the aggregate.The dry mass andsubmerged mass of the sample are u
12、sed for calculation ofapparent relative density.The second sample of the sameaggregate is tested in a known volume metal pycnometer.Theknown mass of the pycnometer with water,mass of the dryaggregate,and mass of the aggregate and pycnometer filledwith water are used for calculation of unsaturated de
13、nsity.Theresults from the two samples tested are then used to calculateabsorption and relative density(OD).3.2 This test can be completed in less than 30 min and canbe used for rapid determination of aggregate properties inconstruction testing laboratories.3.3 This test can be performed on fine,coar
14、se,and blended(combined)aggregates by using appropriate plastic bag andpycnometer sizes.1This test method is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.51 onAggregate Tests.Current edition approved May 1,2021.Publishe
15、d May 2021.Originallyapproved in 2008.Last previous edition approved in 2014 as D7370/D7370M 14.DOI:10.1520/D7370_D7370M-14R21.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,ref
16、er to the standards Document Summary page onthe ASTM website.Copyright 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 theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.14.Significance a
