Application of the Rietveld method to the analysis of anhydrous cement

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1、CementandConcreteResearch41(2011)133–148ContentslistsavailableatScienceDirectCementandConcreteResearchjournalhomepage:http://ees.elsevier.com/CEMCON/default.aspApplicationoftheRietveldmethodtotheanalysisofanhydrouscementGwennLeSaoût⁎,VanessaKocaba,KarenSc

2、rivenerLaboratoryofConstructionMaterials,SwissFederalInstituteofTechnologyLausanne(EPFL),Ecublens,CH-1015Lausanne,SwitzerlandarticleinfoabstractArticlehistory:X-raypowderdiffractionallowsdirectmeasurementofthephasecontentincement.Morerecently,wholeReceive

3、d30March2010patternapproachessuchastheRietveldmethodshowanimprovementinbothwithin(repeatability)andAccepted27October2010betweenlaboratory(reproducibility)precision.TheaimofthispaperistodiscusstheinfluenceofthedifferentparametersinvolvedintheRietveldmethoda

4、ndreviewthemostrecentquantitativeX-raypowderKeywords:diffractionstudiesonanhydrouscement.ComparisonswithBoguecalculations,scanningelectronmicroscopyX-RayDiffraction(B)andnuclearmagneticresonancearealsodiscussed.Cement(D)©2010ElsevierLtd.Allrightsreserved.

5、Contents1.Introduction.............................................................1342.Experimentaldetails.........................................................1343.TheRietveldanalysis.........................................................1353.1.The

6、Rietveldmethod......................................................1353.2.Criteriaoffit..........................................................1353.3.StructurefactorF........................................................1353.3.1.Effectofthechoiceofali

7、tepolymorphonquantification.................................1363.3.2.Effectoftheoccupancyfactoronthesimulationandquantificationofferrite.......................1373.3.3.Refinementoftheoccupancyfactorforotherphases...................................1383.4.Abso

8、rptioncontrast.......................................................1393.4.1.Resultsandabsorptioncorrectionafterrefinement....................................1393.4.2.Effectofthedensityonquantification...............