ASTM_D_632_-_12_2020e1.pdf

Designation:D63212(Reapproved 2020)1Standard Specification forSodium Chloride1This standard is issued under the fixed designation D632;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.1NOTE10.1 was revised editorially in December 2020.1.Scope1.1 This specification covers sodium chloride intended foruse as a deicer and for road construction or maintenancepurposes.1.2 The values stated as SI units are to be regarded as thestandard.1.3 For purposes of determining conformance to thisspecification,values for chemical analysis shall be rounded tothe nearest 0.1%,and values for grading shall be rounded tothe nearest 1%,in accordance with the rounding method inPractice E29.1.4 The text of this specification references notes andfootnotes that provide explanatory material.These notes andfootnotes shall not be considered as requirements of thespecification.1.5 The following precautionary caveat pertains only to thetest method in Annex A1 of this specification:This standarddoes not purport to address all of the safety concerns,if any,associated with its use.It is the responsibility of the user of thisstandard to establish appropriate safety,health,and environ-mental practices and determine the applicability of regulatorylimitations prior to use.1.6 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:2C136/C136M Test Method for Sieve Analysis of Fine andCoarse AggregatesC670 Practice for Preparing Precision and Bias Statementsfor Test Methods for Construction MaterialsE11 Specification for Woven Wire Test Sieve Cloth and TestSievesE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE287 Specification for Laboratory Glass Graduated BuretsE288 Specification for Laboratory Glass Volumetric FlasksE534 Test Methods for Chemical Analysis of Sodium Chlo-ride3.Classification3.1 This specification covers sodium chloride obtained fromnatural deposits(rock salt)or produced by man(evaporated,solar,other)and recognizes two types and two grades asfollows:3.1.1 Type IUsed primarily as a pavement deicer or inaggregate stabilization.3.1.1.1 Grade 1Standard grading(Note 1).3.1.1.2 Grade 2Special grading(Note 1).3.1.2 Type IIUsed in aggregate stabilization or for pur-poses other than deicing.NOTE1Grade 1 provides a particle grading for general application,and has been found by latest research to be most effective for ice controland skid resistance under most conditions.Grade 2 is the grading typicalof salt produced in the western United States and is available in states ofthe Rocky Mountains region and west,which may be preferred bypurchasers in that area.1This specification is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.31 onCalcium and Sodium Chlorides and Other Deicing Materials.Current edition approved Nov.1,2020.Published November 2020.Originallyapproved in 1941.Last previous edition approved in 2012 as D632 12.DOI:10.1520/D0632-12R20E01.2For 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.14.Chemical Requirements4.1 The sodium chloride shall conform to the followingrequirement for chemical composition,except for the tolerancestated in 6.1 and 6.2:Sodium chloride(NaCl),min,%95.05.Physical Requirements5.1 Grading:5.1.1 Type IThe grading of Type I sodium chloride,whentested by means of laboratory sieves conforming to Specifica-tion E11,shall conform to the following requirements forparticle size distribution,except for the tolerance stated in 6.1and 6.1.1:Mass%PassingSieve SizeGrade 1Grade 219.0 mm(34in.).10012.5 mm(12in.)100.9.5 mm(38in.)95 to 100.4.75 mm(No.4)20 to 9020 to 1002.36 mm(No.8)10 to 6010 to 60600 m(No.30)0 to 150 to 155.1.2 Type IIThe grading of Type II sodium chloride shallconform to the grading requirements imposed or permitted bythe purchaser under conditions of t