1、Designation:D7063/D7063M11Standard Test Method forEffective Porosity and Effective Air Voids of CompactedBituminous Paving Mixture Samples1This standard is issued under the fixed designation D7063/D7063M;the number immediately following the designation indicates theyear of original adoption or,in th
2、e 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 of effectiveporosity or effective air voids of com
3、pacted mixtures by the useof a vacuum sealing method.1.2 This method can be used for compacted field andlaboratory bituminous paving samples,as well as other com-pacted samples with well defined geometrical shapes,such asconcrete cylinders,cored rocks,and metal samples.1.3 The results of this test m
4、ethod can be used to determinethe degree of interconnectivity of air voids within a sample andcan be correlated to permeability of compacted bituminouspaving mixture samples.1.4 A multi-laboratory precision and bias statement for thisstandard has not been developed at this time.Therefore,thisstandar
5、d should not be used for acceptance or rejection of amaterial for purchasing purposes.1.5 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 equivalent;therefore,eachsystem shall be used independently of
6、the other.Combiningvalues from the two systems may result in non-conformancewith the standard.1.6 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 safety and health practi
7、ces and determine the applica-bility of regulatory requirements prior to use.2.Referenced Documents2.1 ASTM Standards:2D979 Practice for Sampling Bituminous Paving MixturesD4753 Guide for Evaluating,Selecting,and Specifying Bal-ances and Standard Masses for Use in Soil,Rock,andConstruction Materials
8、 TestingE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodD5361 Practice for Sampling Compacted Bituminous Mix-tures for Laboratory Testing3.Significance and Use3.1 In this test method a compacted sample is vacuumsealed inside a plastic bag.The density o
9、f the sample,SG1,iscalculated using a water displacement method,with the samplesealed.With the sample still in water,the bag is cut open.Sincethe sample is under vacuum and the air voids are evacuated,water will rush in to fill all the water accessible air voids in thecompacted sample.With the satur
10、ated weight of sampleknown,an apparent maximum density,SG2,can be calculated.The difference between SG2 and SG1 is the measure of theamount of water that has penetrated the compacted sample.This difference can be used to determine the fraction of totalnumber of voids that are accessible to water,Eff
11、ective PercentPorosity or Percent Effective Air Voids.3.2 The results obtained from this method can be used todetermine the percentage of total air voids in a compactedsample that can be filled with water through surface orinterconnected paths within the sample.In general,EffectivePercent Porosity s
12、hould be less than total percent air voids.1This test method is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.21 onSpecific Gravity and Density of Bituminous Mixtures.Current edition approved on June 1,2011.Published Jul
13、y 2011.Originallypublished in 2005.Last approved in 2005 as D706305DOI:10.1520/D7063_D7063M-11.2For 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 Sum
14、mary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.3 This method can be used for 100 mm and 150 mmdiameter cylindrical samples and cubical samples.4.Apparatus4.1 Balance,with ample capacity,and with sufficient
15、sensi-tivity to enable bulk specific gravity of specimens to becalculated to at least four significant figures,that is to at leastthree decimal places.It shall be equipped with a suitableapparatus3to permit weighing the specimen while it is sus-pended in water.The balance shall conform to Guide D475
16、3 asa class GP2 balance.NOTE1Since there are no more significant figures in the quotient(bulk specific gravity)than appear in either the dividend(the mass of thespecimen in air)or in the divisor(the volume of the specimen,obtainedfrom the difference in mass of the specimen in air and in water),thismeans that the balance must have a sensitivity capable of providing bothmass and volume values to at least four figures.For example,a sensitivityof 0.1 g 0.00022 lb would provide four significant figur
