1、Designation:D118807(Reapproved 2015)Standard Test Method forBulk Specific Gravity and Density of Compacted BituminousMixtures Using Coated Samples1This standard is issued under the fixed designation D1188;the number immediately following the designation indicates the year oforiginal adoption or,in t
2、he case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This t
3、est method covers the determination of bulkspecific gravity of specimens of Parafilm-coated,compactedbituminous mixtures as defined in Terminology E12.1.2 This method should be used with samples that containopen or interconnecting voids or absorb more than 2%ofwater by volume,or both,as determined b
4、y Section 8.1.3 The bulk specific gravity of the compacted bituminousmixtures may be used in calculating the unit weight of themixture.1.4 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 establ
5、ish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D979 Practice for Sampling Bituminous Paving MixturesD1461 Test Method for Moisture or Volatile Distillates inBituminous Paving MixturesD2726
6、 Test Method for Bulk Specific Gravity and Densityof Non-Absorptive Compacted Bituminous MixturesD3203 Test Method for Percent Air Voids in CompactedDense and Open Bituminous Paving MixturesD4753 Guide for Evaluating,Selecting,and Specifying Bal-ances and Standard Masses for Use in Soil,Rock,andCons
7、truction Materials TestingD5361 Practice for Sampling Compacted Bituminous Mix-tures for Laboratory TestingD6752 Test Method for Bulk Specific Gravity and Densityof Compacted Bituminous Mixtures Using AutomaticVacuum Sealing MethodE12 Terminology Relating to Density and Specific Gravityof Solids,Liq
8、uids,and Gases(Withdrawn 1996)33.Significance and Use3.1 This test method is useful in calculating percent airvoids as given in Test Method D3203.Since specific gravityhas no units,it must be converted to density when this type ofmeasurement is required.This conversion is made by multi-plying the sp
9、ecific gravity at a given temperature by the densityof water at the same temperature.4.Apparatus4.1 Balance,with ample capacity,and with sufficient sensi-tivity to enable bulk specific gravities to the specimens to becalculated to at least four significant figures,that is,to at leastthree decimal pl
10、aces.It shall be equipped with a suitableapparatus to permit weighing the specimen while it is sus-pended in water.The balance shall conform to SpecificationD4753 as a class GP2 balance.4.1.1 Since there are no more significant figures in thequotient(bulk specific gravity)than appear in either thedi
11、vidend(the mass of the specimen in air)or in the divisor(thevolume of the specimen,obtained from the difference in massof the specimen in air and in water),this means that the balancemust have a sensitivity capable of providing both mass andvolume values to at least four figures.For example,a sensi-
12、tivity of 0.1 g would provide four significant figures for thedetermination of a mass in the range from 130.0 to 999.9 gwhen the specific gravity is 2.300.4.2 Water Bath,for immersing the specimen in water whilesuspended,equipped with either an overflow outlet for main-taining a constant water level
13、 or an electronic tare feature onthe scale.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 Asphalt Mixtures.Current edition approved July 1,2015.Published October 2
14、015.Originallyapproved in 1951.Last previous edition approved in 2007 as D1188 071.DOI:10.1520/D1188-07R15.2For 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
15、Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.Materials5.1 ParafilmIs an elastomeric film obtainable from mos
16、tscientific suppliers.5.2 Polyurethane FoamA foam mat of a minimum of50 50 cm(20 20 in.)shall be used for the working surfaceby about 12.5 mm(0.5 in.)thick.Additionally,a minimum ofone foam pad with a size approximately equal to the topsurface dimensions of the sample shall be on hand.5.3 Calibration CylinderAn approximately 100-mm(4-in.)diameter by 60-mm(2.5-in.)smooth-sided aluminumcylinder.6.Test Specimens6.1 Test specimens may be molded from laboratory-mixedfield samples or be cut from bitum