1、Designation:C1012/C1012M15Standard Test Method forLength Change of Hydraulic-Cement Mortars Exposed to aSulfate Solution1This standard is issued under the fixed designation C1012/C1012M;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.Scope*1.1 This test method covers the determination of lengthchange of mortar bars immersed in a sulfate solution.Morta
3、rbars made using mortar described in Test Method C109/C109M are cured until they attain a compressive strength of20.0 6 1.0 MPa 3000 6 150 psi,as measured using cubesmade of the same mortar,before the bars are immersed.1.2 The values stated in either SI units or inch-pound unitsare to be regarded se
4、parately as standard.Within the text,theinch-pound units are shown in brackets.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 stand
5、ard 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.2.Referenced Documents2.1 ASTM S
6、tandards:2C109/C109M Test Method for Compressive Strength ofHydraulic Cement Mortars(Using 2-in.or 50-mm CubeSpecimens)C114 Test Methods for Chemical Analysis of HydraulicCementC150 Specification for Portland CementC157/C157M Test Method for Length Change of HardenedHydraulic-Cement Mortar and Concr
7、eteC215 TestMethodforFundamentalTransverse,Longitudinal,and Torsional Resonant Frequencies ofConcrete SpecimensC305 Practice for Mechanical Mixing of Hydraulic CementPastes and Mortars of Plastic ConsistencyC348 Test Method for Flexural Strength of Hydraulic-Cement MortarsC349 Test Method for Compre
8、ssive Strength of Hydraulic-Cement Mortars(Using Portions of Prisms Broken inFlexure)C452 Test Method for Potential Expansion of Portland-Cement Mortars Exposed to SulfateC490 Practice for Use ofApparatus for the Determination ofLength Change of Hardened Cement Paste,Mortar,andConcreteC511 Specifica
9、tion for Mixing Rooms,Moist Cabinets,Moist Rooms,and Water Storage Tanks Used in theTesting of Hydraulic Cements and ConcretesC595 Specification for Blended Hydraulic CementsC597 Test Method for Pulse Velocity Through ConcreteC618 Specification for Coal Fly Ash and Raw or CalcinedNatural Pozzolan fo
10、r Use in ConcreteC778 Specification for SandC917 Test Method for Evaluation of Cement Strength Uni-formity From a Single SourceC989 Specification for Slag Cement for Use in Concrete andMortarsC1157 Performance Specification for Hydraulic CementD1193 Specification for Reagent WaterE18 Test Methods fo
11、r Rockwell Hardness of Metallic Ma-terialsE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method2.2 American Concrete Institute Reports:ACI C201-2R-01 Guide to Durable Concrete33.Signif
12、icance and Use3.1 This test method provides a means of assessing thesulfate resistance of mortars made using portland cement,blends of portland cement with pozzolans or slags,and blended1This test method is under the jurisdiction of ASTM Committee C01 on Cementand is the direct responsibility of Sub
13、committee C01.29 on Sulfate Resistance.Current edition approved Oct.1,2015.Published October 2015.Originallyapproved in 1984.Last previous edition approved in 2012 as C1012/C1012M13.DOI:10.1520/C1012_C1012M-15.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer
14、 Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from American Concrete Institute(ACI),P.O.Box 9094,FarmingtonHills,MI 48333-9094,http:/www.concrete.org.*A Summary of Changes section appears at
15、the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 hydraulic cements.Method C452 is suitable for evaluatingportland cements but not blended cements or blends of portlandcement with pozzolans or slags.3.2 The standard
16、exposure solution used in this test method,unless otherwise directed,contains 352 moles of Na2SO4perm3(50 g/L).Other sulfate concentrations or other sulfates suchas MgSO4may be used to simulate the environmental exposureof interest.Further discussion of these and other technicalissues is given in the Appendix.4.Apparatus4.1 Mixer,conforming to the requirements of Practice C305.4.2 Cube Molds,conforming to the requirements of TestMethod C109/C109M.4.3 Bar Molds,conforming to the requirements of S
