1、Designation:D8378/D8378M21Standard Test Method forPotential Expansion of Steel Slag from Hydration Reactionsby Autoclave1This standard is issued under the fixed designation D8378/D8378M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision
2、,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 potentialvolume expansion of steel slags that contain componentss
3、usceptible to hydration and consequent volume increase,suchas the free calcium and magnesium oxides.1.1.1 This method is based upon the Cement Autoclaveprocedure,Test Method C151/C151M,and the CaliforniaBearing Ratio procedure,Test Method D1883.This is anaggressive test that can detect both calcium
4、and magnesiumexpansion potentials.The procedure is also a rapid methodtypically completed within 24 h.1.2 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
5、independently of the other.Combiningvalues from the two systems may result in nonconformancewith the standard.NOTE1Sieve size is identified by its standard designation in Speci-fication E11.The alternative designation given in parentheses is forinformation only and does not represent a different sta
6、ndard sieve size.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
7、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 Technica
8、lBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2C29/C29M Test Method for Bulk Density(“Unit Weight”)and Voids in AggregateC151/C151M Test Method for Autoclave Expansion of Hy-draulic CementC702/C702M Practice for Reducing Samples of Aggregateto Testing SizeC1005 Specificat
9、ion for Reference Masses and Devices forDetermining Mass and Volume for Use in Physical Testingof Hydraulic CementsD75/D75M Practice for Sampling AggregatesD1883 Test Method for California Bearing Ratio(CBR)ofLaboratory-Compacted SoilsD4792/D4792M Test Method for Potential Expansion ofAggregates fro
10、m Hydration ReactionsE11 Specification for Woven Wire Test Sieve Cloth and TestSieves2.2 Other Standard:3Indiana Test Method ITM 219 Acceptance Procedures ofSteel Furnace Slag for Deleterious Materials3.Summary of Test Method3.1 This test method consists of measuring the volumeexpansion of compacted
11、 specimens following the autoclaveprocedures of Test Method C151/C151M.The method utilizesa mold similar to the one used in Test Method D1883,with theexception of it being proportionally smaller in order to fit in theautoclave.This method is severe due to the high temperaturesand pressure.This metho
12、d detects periclase(MgO)hydrationreactions that may not appear during some water bathprocedures,such as Test Method D4792/D4792M.As a result,1This test method is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.51 onAggrega
13、te Tests.Current edition approved Jan.1,2021.Published January 2021.DOI:10.1520/D8378_D8378M-21.2For 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 Su
14、mmary page onthe ASTM website.3Available from Indiana Department of Transportation,https:/www.in.gov/indot/div/mt/itm/pubs/219_testing.pdf.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordan
15、ce 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.1the numerical results obtained by this
16、 method tend to be higherthan those obtained by other methods.When used foracceptance/rejection,this method should be correlated to thespecified test methods.4.Significance and Use4.1 This test method provides a procedure for determiningthe compliance of steel slags and other materials with specifi-cations or applications that limit permissible expansion of baseand subbase aggregates containing components subject tohydration.4.2 This test method can also be used to evaluate theeffectiveness of a
