ASTM_D_7870_-_D_7870M_-_20.pdf

Designation:D7870/D7870M20Standard Practice forMoisture Conditioning Compacted Asphalt MixtureSpecimens by Using Hydrostatic Pore Pressure1This standard is issued under the fixed designation D7870/D7870M;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.1.Scope1.1 This practice includes procedures for preparing com-pacted asphalt mixture specimens,exposing the specimens tohydrostatic pore pressure inside an enclosed chamber,andguidance on testing the specimens for the effect of water on thetensile strength or change in other properties of the asphaltmixture,such as density,modulus,etc.1.2 Specimens conditioned according to this practice can betested using methods and test procedures referenced in thisdocument,and those results may provide information as to theeffect of the moisture conditioning of this practice on themoisture sensitivity of those mixtures.1.3 The text of this standard references notes and footnoteswhich provide explanatory material.These notes and footnotes(excluding those in tables and figures)shall not be consideredas requirements of the standard.1.4 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 nonconformancewith the standard.1.5 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.6 This international standard was developed in accor-dance with internationally recognized 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:2D8 Terminology Relating to Materials for Roads and Pave-mentsD979/D979M Practice for Sampling Bituminous PavingMixturesD1561/D1561M Practice for Preparation of BituminousMixture Test Specimens by Means of California KneadingCompactorD2726/D2726M Test Method for Bulk Specific Gravity andDensity of Non-Absorptive Compacted Asphalt MixturesD3665 Practice for Random Sampling of Construction Ma-terialsD3666 Specification for Minimum Requirements for Agen-cies Testing and Inspecting Road and Paving MaterialsD4013 Practice for Preparation of Test Specimens of Bitu-minous Mixtures by Means of Gyratory Shear Compactor(Withdrawn 2013)3D4867/D4867M Test Method for Effect of Moisture onAsphalt Concrete Paving MixturesD5361/D5361M Practice for Sampling Compacted AsphaltMixtures for Laboratory TestingD6752/D6752M Test Method for Bulk Specific Gravity andDensity of Compacted Asphalt Mixtures Using AutomaticVacuum Sealing MethodD6925 Test Method for Preparation and Determination ofthe Relative Density of Asphalt Mix Specimens by Meansof the Superpave Gyratory CompactorD6926 Practice for Preparation of Asphalt Mixture Speci-mens Using Marshall ApparatusD6927 Test Method for Marshall Stability and Flow ofAsphalt MixturesD6931 Test Method for Indirect Tensile(IDT)Strength ofAsphalt Mixtures1This practice is under the jurisdiction of ASTM Committee D04 on Road andPaving Materials and is the direct responsibility of Subcommittee D04.22 on Effectof Water and Other Elements on Asphalt Coated Aggregates.Current edition approved May 1,2020.Published May 2020.Originallyapproved in 2013.Last previous edition approved in 2013 as D7870/D7870M 13.DOI:10.1520/D7870_D7870M-20.2For 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.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 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.2.2 AASHTO Standard:4AASHTO T 378 Standard Method of Test for Determiningthe Dynamic Modulus and Flow Number for AsphaltMixtures Using the Asphalt Mixture Performance Tester(AMPT)3.Terminology3.1 Refer to Terminology D8 for definitions relating tomaterials for roads and pavements.4.Significance