ASTM_D_4469_-_11.pdf

Designation:D446911Standard Practice forCalculating Percent Asphalt Absorption by the Aggregate inan Asphalt Pavement Mixture1This standard is issued under the fixed designation D4469;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 equations for calculating percentasphalt absorption by the aggregate in an asphalt pavingmixture,expressed as percent of the oven-dry mass of theaggregate in the paving mixture.This calculation is based onmeasured values for components and properties of an oven-dryasphalt paving mixture.1.2 This practice 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:2C127 Test Method for Density,Relative Density(SpecificGravity),and Absorption of Coarse AggregateC128 Test Method for Density,Relative Density(SpecificGravity),and Absorption of Fine AggregateC136 Test Method for Sieve Analysis of Fine and CoarseAggregatesD1560 Test Methods for Resistance to Deformation andCohesion of Bituminous Mixtures by Means of HveemApparatusD2041 Test Method for Theoretical Maximum SpecificGravity and Density of Bituminous Paving MixturesD2172 Test Methods for Quantitative Extraction of BitumenFrom Bituminous Paving MixturesD3289 Test Method for Density of Semi-Solid and SolidBituminous Materials(Nickel Crucible Method)D4125 Test Methods for Asphalt Content of BituminousMixtures by the Nuclear MethodD5444 Test Method for Mechanical Size Analysis of Ex-tracted AggregateD6307 Test Method forAsphalt Content of Hot-MixAsphaltby Ignition MethodD6857 Test Method for Maximum Specific Gravity andDensity of Bituminous Paving Mixtures Using AutomaticVacuum Sealing Method3.Summary of Test Method3.1 The percent asphalt absorption for an oven-dry pavingmixture(expressed as percent of the oven-dry mass of the totalaggregate in the paving mixture)can be calculated by means ofequations in which measured values for the theoretical maxi-mum specific gravity of an oven-dry paving mixture,its asphaltcontent(expressed either as percent of the total mass of asample of oven-dry paving mixture,or as percent of the massof oven-dry aggregate in a sample of oven-dry pavingmixture),the apparent specific gravity of the asphalt and theweighted average ASTM bulk specific gravity of the oven-drytotal aggregate in the paving mixture(Note 1).NOTE1Whenever it is referred to in this practice,the phrase,“weighted average ASTM oven-dry bulk specific gravity of theaggregate,”refers to the weighted average of the ASTM oven-dry bulkspecific gravities of the coarse and fine aggregates as determined by TestMethods C127 and C128.The fine aggregate ordinarily includes themineral dust portion of the fine aggregate that passes the No.200 sieve.The weighted average ASTM oven-dry bulk specific gravity of the totalaggregate is to be calculated by means of the equation given in thecalculation section of Test Method C127.4.Significance and Use4.1 The amount of asphalt absorbed by the aggregatecontributes little or nothing to the durability of an asphaltpavement in service other than possibly providing greaterresistance to stripping in the presence of water.4.2 Percent asphalt absorption can be an indicator ofchanges that may occur in plant mix production duringconstruction.4.3 The calculated percent asphalt absorption can be usedfor calculating percent air voids during paving mixture design.5.Procedure5.1 Determine percent asphalt absorption by the aggregatein a paving mixture for a sample of oven-dried paving mixture1This practice is under the jurisdiction of ASTM Committee D04 on Road andPaving Materials and is the direct responsibility of Subcommittee D04.51 onAggregate Tests.Current edition approved Dec.1,2011.Published December 2011.Originallyapproved in 1985.Last previous edition approved in 2006 as D4469 01(2006).DOI:10.1520/D4469-11.2For 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 Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 that is prepared in a laboratory,taken from a pavement,orobtained for quality control during construction.5.2 Establish percent asphalt absorption by the aggregate ina sample of oven-dried paving mixture from values for thesample that have been obtained in accordance with the follow-ing ASTM test methods:5.2.1 Test Method D2041 or D6857,theoretical maximumspecifi