ASTM_D_8079_-_16.pdf

Designation:D807916Standard Practice forPreparation of Compacted Slab Asphalt Mix Samples Usinga Segmented Rolling Compactor1This standard is issued under the fixed designation D8079;the number immediately following the designation indicates the year oforiginal adoption or,in the 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.1.Scope1.1 This practice covers the fabrication of slabs of asphaltmix using an automated laboratory rolling compactor(RC).Compacted specimens are suitable for volumetric and physicalproperty testing.This practice should not be used for accep-tance or rejection of a material or for purchasing purposes.1.2 UnitsThe values stated in SI units are to be regardedas standard.No other units of measurement are included in thisstandard.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 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/D979M Practice for Sampling Bituminous PavingMixturesD1188 Test Method for Bulk Specific Gravity and Density ofCompacted Bituminous Mixtures Using Coated SamplesD2041 Test Method for Theoretical Maximum SpecificGravity and Density of Bituminous Paving MixturesD2726 Test Method for Bulk Specific Gravity and Densityof Non-Absorptive Compacted Bituminous MixturesD3666 Specification for Minimum Requirements for Agen-cies Testing and Inspecting Road and Paving MaterialsD6752 Test Method for Bulk Specific Gravity and Densityof Compacted Bituminous Mixtures Using AutomaticVacuum Sealing MethodD6857 Test Method for Maximum Specific Gravity andDensity of Bituminous Paving Mixtures Using AutomaticVacuum Sealing MethodD7460 Test Method for Determining Fatigue Failure ofCompacted Asphalt Concrete Subjected to Repeated Flex-ural BendingE644 Test Methods for Testing Industrial Resistance Ther-mometers2.2 AASHTO Standards:3AASHTO T 321 Method of Test for Determining the FatigueLife of Compacted Asphalt Mixtures Subjected to Re-peated Flexural BendingAASHTO T 324 Method of Test for Hamburg Wheel-TrackTesting of Compacted Hot Mix Asphalt(HMA)AASHTO M 323 Specification for Superpave VolumetricMix Design2.3 Additional Resources:4Asphalt Institute MS-2 Asphalt Mix Design Methods3.Terminology3.1 Definitions:3.1.1 rolling compactora device that uses a segment or arcof a circle composed of metal to compact asphalt mixture intoa slab.3.1.2 rolling compactor footthe portion of the device thatconsists of the segment or arc of a circle composed of metalattached to the loading frame that rotates across the surface ofthe asphalt mixture.3.1.3 rolling compactor traythe portion of the device thatthe mold rests on during compaction.The tray can be stationaryor can move horizontally to facilitate compaction.3.2 Definitions of Terms Specific to This Standard:3.2.1 lab mix lab compacted(LMLC)asphalt mixasphaltmix samples that are prepared in the laboratory by weighing1This practice is under the jurisdiction of ASTM Committee D04 on Road andPaving Materials and is the direct responsibility of Subcommittee D04.20 onMechanical Tests of Asphalt Mixtures.Current edition approved Dec.1,2016.Published December 2016.DOI:10.1520/D807916.2For 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.3Available from American Association of State Highway and TransportationOfficials(AASHTO),444 N.Capitol St.,NW,Suite 249,Washington,DC 20001,http:/www.transportation.org.4Available from Asphalt Institute at:http:/bookstore.asphaltinstitute.org/catalog/book/ms-2-asphalt-mix-design-methods.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 and blending each constituent and then compacting the blendedmix using a laboratory compaction apparatus.3.2.1.1 DiscussionLMLC typically occurs during the as-phalt mix design phase.3.2.2 plant mix laboratory compacted(PMLC)asphaltmixasphalt mix samples that are manufactured in a produc-tion plant,sampled prior to compaction,then immediatelycompacted using a laboratory compaction apparatus.3.2.2.1 DiscussionPMLC specimens are often used forquality control testing.Asphalt mix is not permitted to coolsubstantially and it may be necessary to place the mix in alaboratory oven to equilibrate the mix to the compactiontemperature before molding.3.2.3 reheated plant mix lab compacted