1、Designation:C136506(Reapproved 2011)Standard Test Method forDetermination of the Proportion of Phases in PortlandCement and Portland-Cement Clinker Using X-Ray PowderDiffraction Analysis1This standard is issued under the fixed designation C1365;the number immediately following the designation indica
2、tes 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.Scope*1.1 This test method covers direct determination of th
3、eproportion by mass of individual phases in portland cement orportland-cement clinker using quantitative X-ray(QXRD)analysis.The following phases are covered by this standard:alite(tricalcium silicate),belite(dicalcium silicate),aluminate(tricalcium aluminate),ferrite(tetracalcium aluminoferrite),pe
4、riclase(magnesium oxide),gypsum(calcium sulfatedihydrate),bassanite(calcium sulfate hemihydrate),anhydrite(calcium sulfate),and calcite(calcium carbonate).1.2 This test method specifies certain general aspects of theanalytical procedure,but does not specify detailed aspects.Recommended procedures ar
5、e described,but not specified.Regardless of the procedure selected,the user shall demon-strate by analysis of certified reference materials(CRMs)thatthe particular analytical procedure selected for this purposequalifies(that is,provides acceptable precision and bias)(seeNote 1).The recommended proce
6、dures are ones used in theround-robin analyses to determine the precision levels of thistest method.NOTE1Asimilar approach was used in the performance requirementsfor alternative methods for chemical analysis in Test Methods C114.1.3 The values stated in SI units shall be regarded as thestandard.1.4
7、 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.For specifichazards,s
8、ee Section 9.2.Referenced Documents2.1 ASTM Standards:2C114 Test Methods for Chemical Analysis of HydraulicCementC150 Specification for Portland CementC183 Practice for Sampling and the Amount of Testing ofHydraulic CementC219 Terminology Relating to Hydraulic CementC670 Practice for Preparing Preci
9、sion and Bias Statementsfor Test Methods for Construction MaterialsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method3.Terminology3.1 Definitions:Definition
10、s are in accordance with Termi-nology C219.3.2 Phases(1):33.2.1 alite,ntricalcium silicate(C3S)4modified in com-position and crystal structure by incorporation of foreign ions;occurs typically between 30 to 70%(by mass)of the portland-cement clinker;and is normally either the M1or M3crystalpolymorph
11、,each of which is monoclinic.3.2.2 alkali sulfates,narcanite(K2SO4)may accommo-date Na+,Ca2+,and CO3in solid solution,aphthitalite(K4-x,Nax)SO4with x usually 1 but up to 3),calcium langbeinite(K2Ca2SO43)may occur in clinkers high in K2O,andthenardite(Na2SO4)in clinkers with high Na/K ratios(1).1This
12、 test method is under the jurisdiction of ASTM Committee C01 on Cementand is the direct responsibility of Subcommittee C01.23 on CompositionalAnalysis.Current edition approved Dec.1,2011.Published May 2012.Originallyapproved in 1998.Last previous edition approved in 2006 as C1365-98(2006).DOI:10.152
13、0/C1365-06R11.2For 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.3The boldface numbers in parentheses refer to the li
14、st of references at the end ofthis standard.4When expressing chemical formulae,C=CaO,S=SiO2,A=Al2O3,F=Fe2O3,M=MgO,S=SO3,and H=H2O.*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 Sta
15、tes1 3.2.3 aluminate,ntricalcium aluminate(C3A)modified incomposition and sometimes in crystal structure by incorpora-tion of a substantial proportion of foreign ions;occurs as 2 to15%(by mass)of the portland-cement clinker;is normallycubic when relatively pure and orthorhombic or monoclinicwhen in
16、solid solution with significant amounts of sodium(2).3.2.4 anhydrite,ncalcium sulfateCS!and is orthorhom-bic(see Note 2).NOTE2Calcium sulfate is added to the clinker during grinding tocontrol setting time,strength development,and volume stability.Severalphases may form as a result of dehydration of gypsum.The first 1.5molecules of water are lost between 0 and 65 C with minor changes instructure;and,above 95 C,the remaining 0.5 molecules of water are losttransforming the structure to the metastab