ASTM_D_6390_-_11.pdf

Designation:D639011Standard Test Method forDetermination of Draindown Characteristics inUncompacted Asphalt Mixtures1This standard is issued under the fixed designation D6390;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 test method covers the determination of the amountof draindown in an uncompacted asphalt mixture sample whenthe sample is held at elevated temperatures comparable to thoseencountered during the production,storage,transport,andplacement of the mixture.The test is particularly applicable tomixtures such as porous asphalt(open-graded friction course)and stone matrix asphalt(SMA)1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.3 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:2C670 Practice for Preparing Precision and Bias Statementsfor Test Methods for Construction MaterialsD979 Practice for Sampling Bituminous Paving MixturesD4753 Guide for Evaluating,Selecting,and Specifying Bal-ances and Standard Masses for Use in Soil,Rock,andConstruction Materials TestingD6926 Practice for Preparation of Bituminous SpecimensUsing Marshall ApparatusE11 Specification for Woven Wire Test Sieve Cloth and TestSieves3.Terminology3.1 Definitions:3.1.1 draindownfor the purpose of this test method,drain-down is considered to be that portion of material whichseparates itself from the sample as a whole and is depositedoutside the wire basket during the test.The material whichdrains may be composed of either asphalt binder or a combi-nation of asphalt binder,additives,or fine aggregate.4.Summary of Test Method4.1 A sample of the asphalt mixture to be tested is preparedin the laboratory or obtained from field production.The sampleis placed in a wire basket which is positioned on a plate orother suitable container of known mass.The sample,basket,and plate or container are placed in a force draft oven for onehour at a pre-selected temperature.At the end of one hour,thebasket containing the sample is removed from the oven alongwith the plate or container and the mass of the plate orcontainer containing the drained material,if any,is determined.The amount of draindown is then calculated.5.Significance and Use5.1 This test method can be used to determine whether theamount of draindown measured for a given asphalt mixture iswithin specified acceptable levels.The test provides an evalu-ation of the draindown potential of an asphalt mixture duringmixture design and/or during field production.This test isprimarily used for mixtures with high coarse aggregate contentsuch as porous asphalt(open-graded friction course)and stonematrix asphalt(SMA).6.Apparatus6.1 Forced Draft Oven,capable of maintaining the tempera-ture in a range from 120 to 175C and the set temperature towithin 6 2C.6.2 Plates,or other suitable containers of appropriate size.The plates or containers used shall be of appropriate durabilityto withstand the oven temperatures.Cake pans or pie tins areexamples of suitable types of containers.6.3 Standard basket meeting the dimensions shown in Fig.1.The basket shall be constructed using standard 6.3 mm sievecloth as specified in Specification E11.6.4 BalanceA balance readable to 0.1g and conforming tothe requirements of Specification D4753,GP2.1This test method is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.25 onAnalysis of Asphalt Mixtures.Current edition approved Jan.1,2011.Published March 2011.Originallyapproved in 1999.Last previous edition approved in 2005 as D6390 05.DOI:10.1520/D6390-11.2For 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 7.Sample Preparation7.1 Laboratory Prepared Samples:7.1.1 Number of SamplesFor each mixture tested,thedraindown characteristics shall be determined at two differenttemperatures.The two temperatures shall be the anticipatedplant production temperature as well as 10C above(see Note1).For each temperature,duplicate samples shall be tested.Thus for one asphalt mixture,a minimum of four samples willbe tested.7.1.2 Dry the aggregate to a constant mass and sieve it intoappropriate size fractions as indicated in Practice