1、Designation:C45215Standard Test Method forPotential Expansion of Portland-CementMortars Exposed to Sulfate1This standard is issued under the fixed designation C452;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revi
2、sion.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This test method,which is applicable only to portlandcements,covers the determination of the expansion of mortarbars made from a mi
3、xture of portland cement and gypsum insuch proportions that the mixture has a sulfur trioxide(SO3)content of 7.0 mass%.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,eachsyst
4、em shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.Values in SI units or inch-pound units shallbe obtained by measurement in SI units or inch pound unitsor by appropriate conversion,using the Rules for Conversionand Roundin
5、g given in IEEE/ASTM SI 10,of measurementsmade in other units(or SI units).Values are stated in only SIunits when inch-pound units are not used in practice.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 th
6、is standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.WarningFresh hydraulic cementitious mixtures are causticand may cause chemical burns to skin and tissue uponprolonged exposure.22.Referenced Documents2.1 ASTM Sta
7、ndards:3C109/C109M Test Method for Compressive Strength ofHydraulic Cement Mortars(Using 2-in.or 50-mm CubeSpecimens)C150 Specification for Portland CementC219 Terminology Relating to Hydraulic CementC230/C230M Specification for Flow Table for Use in Testsof Hydraulic CementC305 Practice for Mechani
8、cal Mixing of Hydraulic CementPastes and Mortars of Plastic ConsistencyC471M Test Methods for ChemicalAnalysis of Gypsum andGypsum Products(Metric)C490 Practice for Use ofApparatus for the Determination ofLength Change of Hardened Cement Paste,Mortar,andConcreteC511 Specification for Mixing Rooms,Mo
9、ist 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 CementsD1193 Specification for Reagent Wate
10、rIEEE/ASTM SI 10 Practice for Use of the InternationalSystem of Units(SI):The Modern Metric System3.Terminology3.1 Definitions:3.1.1 For definitions of terms used in this test method,referto Terminology C219.4.Interferences4.1 This test method is not suitable for establishing thesulfate resistance o
11、f blended hydraulic cements nor for com-binations of portland cement and pozzolans or slag cement(Note 1).NOTE1The main increase in sulfate resistance provided by blendedhydraulic cements,pozzolans and slag cement occurs when concrete isexposed after the pozzolans or slag cement have had time to rea
12、ct.5.Significance and Use5.1 This test method is used primarily by those interested inresearch on methods for determining the potential sulfateresistance of portland cement.This test method is also used toestablish that a sulfate-resisting portland cement meets theperformance requirements of Specifi
13、cation C150.1This test method is under the jurisdiction of ASTM Committee C01 on Cementand is the direct responsibility of Subcommittee C01.29 on Sulfate Resistance.Current edition approved Aug.1,2015.Published August 2015.Originallyapproved in 1960.Last previous edition approved in 2010 as C452/C45
14、2M 10.DOI:10.1520/C0452_C0452M-15.2Section on Safety,Manual of Cement Testing,Annual Book of ASTMStandards,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
15、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.Apparatus6.1 Weights and Weighing Devices,conforming to the re-quirement
16、s of Specification C1005.6.2 Flow Table,conforming to the requirements of Specifi-cation C230/C230M.6.3 Mixer,Bowl,and Paddle,conforming to the require-ments of Practice C305.6.4 Trowel and Tamper,conforming to the requirements ofTest Method C109/C109M.6.5 Glass Graduates,Molds,and Length Comparator,con-forming to the requirements of Practice C490.7.Temperature and Humidity7.1 Molding Room,Dry Materials,and Mixing WaterMaintain the temperature of the molding room,dry materials,and mixing water a
