1、Designation:D7370/D7370M14Standard 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 following the designati
2、on 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 the determination
3、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 notbe used for a
4、cceptance 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 may not be exact equivalents;therefore,eachsystem shall be used independently
5、 of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.Some values have only SI units becauseinch-pound equivalents are not used in practice.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresp
6、onsibility 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.2.Referenced Documents2.1 ASTM Standards:2C29/C29M Test Method for Bulk Density(“Unit Weight”)and Voids in AggregateC127 Test Method f
7、or Density,Relative Density(SpecificGravity),and Absorption of Coarse AggregateC128 Test Method for Density,Relative Density(SpecificGravity),and Absorption of Fine AggregateC136 Test Method for Sieve Analysis of Fine and CoarseAggregatesC670 Practice for Preparing Precision and Bias Statementsfor T
8、est Methods for Construction MaterialsC702 Practice for Reducing Samples ofAggregate to TestingSizeD75 Practice for Sampling AggregatesD4753 Guide for Evaluating,Selecting,and Specifying Bal-ances and Standard Masses for Use in Soil,Rock,andConstruction Materials TestingD3666 Specification for Minim
9、um Requirements for Agen-cies Testing and Inspecting Road and Paving MaterialsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method3.Summary of Test Method3.1 Sufficient aggregate sample is dried to constant mass.For each test two representative dry aggrega
10、te 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 is used for calculation ofapparent relative density.The second sample of th
11、e 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 is used for calculation of unsaturated density.Theresults from the two samples tested are then used to calculatea
12、bsorption,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,coarse and blended(combined)aggregates by using appropriate plastic bag andp
13、ycnometer sizes.4.Significance and Use4.1 Relative density(specific gravity)is the characteristicgenerally used for calculation of the volume occupied by theaggregate in various mixtures containing aggregate,includingPortland cement concrete,bituminous concrete,and other1This test method is under th
14、e jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.51 onAggregate Tests.Current edition approved June 1,2014.Published February 2015.Originallyapproved in 2008.Last previous edition approved in 2009 as D7370 09.DOI:10.1520/D7370_D737
15、0M-14.2For 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 the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C7
16、00,West Conshohocken,PA 19428-2959.United States1 mixtures that are proportioned or analyzed on an absolutevolume basis.Relative density(specific gravity)is also used inthe computation of voids in aggregate in Test Method C29/C29M.Relative density(specific gravity)saturated surface dry(SSD)is used if the aggregate is at SSD,that is,if itsabsorption has been satisfied.Conversely,the relative density(specific gravity)oven-dry(OD)is used for computationswhen the aggregate is dry or assumed to be dr
