ASTM_D_3744_-_D_3744M_-_18.pdf

Designation:D3744/D3744M18Standard Test Method forAggregate Durability Index1This standard is issued under the fixed designation D3744/D3744M;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 test method covers the determination of a durabilityindex of an aggregate.The calculated durability index is avalue indicating the relative resistance of an aggregate toproduction of detrimental clay-like fines when subjected to theprescribed mechanical methods of degradation.1.2 UnitsThe values stated in either SI units or inch-pound units are to be regarded separately as standard.Thevalues stated in each system may not be exact equivalents;therefore,each system shall be used independently of the other.Combining values from the two systems may result in noncon-formance with the standard.1.2.1 Measurements of volume and mass are only given inSI units because they are the only units typically used inpractice when performing this test method.1.2.2 Measurements in Section 11,Section 15,Eq 3,Eq 4,and Table 1 are only given in inch-pound units because theequipment used in these sections is only manufactured usingthe inch-pound system.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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 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:2C127 Test Method for Relative Density(Specific Gravity)and Absorption of Coarse AggregateC136/C136M Test Method for Sieve Analysis of Fine andCoarse AggregatesC702/C702M Practice for Reducing Samples of Aggregateto Testing SizeD75/D75M Practice for Sampling AggregatesD2419 Test Method for Sand Equivalent Value of Soils andFine AggregateD3666 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 TestingE11 Specification for Woven Wire Test Sieve Cloth and TestSieves3.Summary of Test Method3.1 This test method was developed to permit prequalifica-tion of aggregates proposed for use in the construction oftransportation facilities.This test establishes an aggregatesresistance to generating fines when agitated in the presence ofwater.Separate and different test procedures are used toevaluate the coarse and the fine portions of an aggregate.3.2 A sample of coarse aggregate is prepared to a specificgrading and then washed in a washing vessel secured in amechanical agitator for 2 min.After discarding the minus4.75-mm(No.4)material,dry the washed test sample.3.3 The coarse aggregate test sample is then mechanicallyagitated in the washing vessel for a period of 10 min.Arepresentative portion of the resulting wash water and minus75-m(No.200)size fines is collected and mixed with a stockcalcium chloride solution and placed in a plastic cylinder.Aftera 20-min sedimentation time,the level of the sediment columnis read.The height of the sediment value is then used tocalculate the durability index of the coarse aggregate(Dc).3.4 The fine aggregate sample is prepared by washing aspecific quantity of the material in the washing vessel securedin a mechanical agitator for 2 min.All minus 75-m(No.200)size material is washed from the sample through a 75-m(No.200)sieve and discarded.The plus 75-m(No.200)fraction isdried.1This test method is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.51 onAggregate Tests.Current edition approved Sept.1,2018.Published September 2018.Originallyapproved in 1979.Last previous edition approved in 2011 as D3744/D3744M 11a.DOI:10.1520/D3744_D3744M-18.2For 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 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 Trad