ASTM_D_8021_-_20.pdf

Designation:D802120Standard Guide forBlast Furnace and Steel Furnace Slag as Produced Duringthe Manufacture of Iron and Steel1This standard is issued under the fixed designation D8021;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 standard is intended to provide guidance as to theappropriate/typical mineralogy observed when iron and steelslag,produced during the manufacture of iron and steel,isdesignated as a product.The included information covers themineral properties of blast furnace slag and steel slag whenthey are manufactured in conjunction with the production ofiron or steel,or both(Note 1).NOTE1This guide is not intended to be used to determine theapplicability of iron or steel slag,or both,for various applications.Terminology D8 designates steel slag as a product,while TerminologyC125 designates blast furnace slag as a product.Its sole intent is toprovide guidance as to the typical mineralogy when the iron or steel slag,or both,is designated as a product.1.2 The values stated in SI units are to be regarded asstandard.No other units are utilized in this standard.1.3 The text of this standard references notes and footnotesthat provide explanatory material.These notes and footnotes(excluding those in tables and figures)should not be consideredas requirements of the specification.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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.5 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:2C125 Terminology Relating to Concrete and Concrete Ag-gregatesC702/C702M Practice for Reducing Samples of Aggregateto Testing SizeC989/C989M Specification for Slag Cement for Use inConcrete and MortarsD8 Terminology Relating to Materials for Roads and Pave-mentsD75/D75M Practice for Sampling Aggregates3.Terminology3.1 DefinitionsFor the definitions of terms used in thisstandard,refer to Terminology D8.3.2 Definitions of Terms Specific to This Standard:3.2.1 blast furnace slag,nsee Terminology C125.3.2.1.1 DiscussionSlag,ferrous metal,blast furnace(granulated,GBS or air-cooled,ABFS orABF)Blast furnaceslag is formed in a continuous process by the fusion oflimestone(or dolomite,or a combination thereof)and otherfluxes with the residues from the carbon source and thenon-metallic components of the iron-bearing materials(forexample,iron ore,iron sinter).Blast furnace slag is generatedat temperatures above 1500 C.Dependent on the manner ofcooling of the liquid slag,it can be distinguished betweencrystalline,air-cooled blast furnace slag and glassy,granulatedblast furnace slag.Various cooling processes are defined inTerminology C125.3.2.2 slag,steelmaking,nsteelmaking slags(SMS)aregenerated as products during the refining/modification of steelin the production process.1This guide is under the jurisdiction of ASTM Committee D04 on Road andPaving Materials and is the direct responsibility of Subcommittee D04.99 onSustainable Asphalt Pavement Materials and Construction.Current edition approved Nov.1,2020.Published November 2020.DOI:10.1520/D8021-20.2For 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 Trade Organization Technical Barriers to Trade(TBT)Committee.13.2.2.1 DiscussionSteelmaking slag is formed(forexample,from the conversion of hot metal to steel)from themelting of scrap in an electric arc furnace or from thesubsequent treatments of various refinements/modifications ofthe crude steel,or both.The composition of the slags variesdepending on the process step in which they are produced.Themolten slag which has tapping temperatures of around 1600 Cis discharged into pots or pits where it cools and solidifies toprovide an artificial aggregate having a crystalline structure.They are sometimes referre