ASTM_C_1038_-_C_1038M_-_14b.pdf

Designation:C1038/C1038M14bStandard Test Method forExpansion of Hydraulic Cement Mortar Bars Stored inWater1This standard is issued under the fixed designation C1038/C1038M;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.Scope*1.1 This test method covers the determination of the expan-sion of mortar bars made using hydraulic cement,of whichsulfate is an integral part.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 independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.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.(Warning Freshhydraulic cementitious mixtures are caustic and may causechemical burns to skin and tissue upon prolonged exposure.2)2.Referenced Documents2.1 ASTM Standards:3C109/C109M Test Method for Compressive Strength ofHydraulic Cement Mortars(Using 2-in.or 50-mm CubeSpecimens)C305 Practice for Mechanical Mixing of Hydraulic CementPastes and Mortars of Plastic ConsistencyC490 Practice for Use ofApparatus for the Determination ofLength Change of Hardened Cement Paste,Mortar,andConcreteC511 Specification for Mixing Rooms,Moist Cabinets,Moist Rooms,and Water Storage Tanks Used in theTesting of Hydraulic Cements and ConcretesC778 Specification for SandC1005 Specification for Reference Masses and Devices forDetermining Mass and Volume for Use in the PhysicalTesting of Hydraulic CementsC1437 Test Method for Flow of Hydraulic Cement MortarD1193 Specification for Reagent Water3.Significance and Use3.1 This test method is used to determine the amount ofexpansion of a mortar bar when it is stored in water.Theamount of mortar-bar expansion may relate to the amount ofsulfate in the cement;expansion may become excessive whenthe cement contains too much sulfate.3.2 Some cement specifications limit the amount of sulfatecontained in hydraulic cement by requiring that the amount ofexpansion in water not exceed a specified value.4.Apparatus4.1 Reference Masses and Mass-Determining Devices,con-forming to the requirements of Specification C1005.Evaluatethe device for precision and bias at a total load of 2 kg.4.2 Glass Graduates,Molds,and Length Comparator,con-forming to the requirements of Specification C490.4.3 Moist Cabinet or Room,conforming to the requirementsof Specification C511.4.4 Mixer,Bowl,and Paddle,conforming to the require-ments of Practice C305.4.5 Trowel and Tamper,conforming to the requirements ofTest Method C109/C109M.5.Temperature and Relative Humidity5.1 Molding Room,Dry Materials,and Mixing WaterMaintain the temperature of the molding room,dry materials,and mixing water at 23.0 6 4.0C 73.5 6 7.0F,and maintainthe relative humidity of the molding room at not less than50%.6.Reagents and Materials6.1 Mixing WaterPotable water is satisfactory for routinetests.For all cooperative tests and in case of dispute,usereagent water conforming to the numerical limits of Type III ofSpecification D1193.1This test method is under the jurisdiction of ASTM Committee C01 on Cementand is the direct responsibility of Subcommittee C01.28 on Sulfate Content.Current edition approved Oct.1,2014.Published October 2014.Originallyapproved in 1985.Last previous edition approved in 2014 as C1038/C1038M 14a.DOI:10.1520/C1038_C1038M-14B.2Section on Safety,Manual of Cement Testing,Annual Book of Standards,Vol.04.01.3For 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.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.2 Graded SandSand for making the test specimens shallconform to the requirements for graded standard sand inSpecification C778.7.Procedure7.1 Number and Dimensions of Test SpecimensMake four25 by 25 by 285-mm 1 by 1 by 1114-in.test specimens foreach cement.The effective gauge length of these specimens is250 mm 10 in.NOTE1In routine tests,25 by 25 by 160-mm 1 by 1 by 614-in.specimens may be used;however,in case of dispute,results obtained with25 by 25 by 285-mm 1 by 1 by 1114-in.specimens shall govern.Theeffective gauge length of this specimen is 125 mm 5 in.7.2 Specimen MoldsPrepare the specimen molds in accor-dance with the requirements