ASTM_D_2726_-_D_2726M_-_14.pdf

Designation:D2726/D2726M14Standard Test Method forBulk Specific Gravity and Density of Non-AbsorptiveCompacted Bituminous Mixtures1This standard is issued under the fixed designation D2726/D2726M;the number immediately following 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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 This test method covers the determination of bulkspecific gravity and density of specimens of compacted bitu-minous mixtures.1.2 This test method should not be used with samples thatcontain open or interconnecting voids or absorb more than 2%of water by volume,or both,as determined in 11.3.1.3 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 of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.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 establish 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 MixturesD1188 Test Method for Bulk Specific Gravity and Density ofCompacted Bituminous Mixtures Using Coated SamplesD3203 Test Method for Percent Air Voids in CompactedDense and Open Bituminous Paving MixturesD3666 Specification for Minimum Requirements for Agen-cies Testing and Inspecting Road and Paving MaterialsD4753 Guide for Evaluating,Selecting,and Specifying Bal-ances and Standard Masses for Use in Soil,Rock,andConstruction 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 MethodD7227 Practice for Rapid Drying of Compacted AsphaltSpecimens Using Vacuum Drying ApparatusE1 Specification for ASTM Liquid-in-Glass ThermometersE77 Test Method for Inspection and Verification of Ther-mometersE563 Practice for Preparation and Use of an Ice-Point Bathas a Reference TemperatureE644 Test Methods for Testing Industrial Resistance Ther-mometersE1137 Specification for Industrial Platinum Resistance Ther-mometersE2251 Specification for Liquid-in-Glass ASTM Thermom-eters with Low-Hazard Precision Liquids3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 bulk densityas determined by this test method,themass of a metre cubed(or foot cubed)of the material at 25C77F.3.1.2 bulk specific gravityas determined by this testmethod,the ratio of the mass of a given volume of material at25C 77F to the mass of an equal volume of water at thesame temperature.4.Summary of Test Method4.1 The specimen is immersed in a water bath at 25C77F.The mass under water is recorded,and the specimen istaken out of the water,blotted quickly with a damp cloth towel,and weighed in air.The difference between the two masses isused to measure the mass of an equal volume of water at 25C77F.4.2 This test method provides guidance for determination ofthe oven dry or thoroughly dry mass of the specimen.The bulkspecific gravity is calculated from these masses.Then the1This 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 Aug.1,2014.Published August 2014.Originallyapproved in 1968.Last previous edition approved in 2013 as D2726/D2726M 13.DOI:10.1520/D2726_D2726M-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.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 density is obtained by multiplying the specific gravity of thespecimen by the density of the water.5.Significance and Use5.1 The results obtained from this test method can be usedto determine the unit weight of compacted dense bituminousmixtures and in conjunction with Test Method D3203,to obtainpercent air voids.These values in turn may be used indetermining the relative degree of compaction.5.2 Since specific gravity has no units,it must be convertedto density in order to do calculations that require units.Thisconversion is made by multiplying the specific gravity at agiven temperature by the density of water at the same