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EffectofMgOontheComposition,StructureandPropertiesofAlite-CalciumStrontiumSulphoaluminateCement
ReportsyllabusIntroductionExperimentResultsanddiscussionsConclusions
IntroductionCalciumstrontiumsulphoaluminatemineral(3-X)CaO·XSrO·3Al2O3·SrSO4C1.5Sr2.5A3PortlandcementAlite-calciumstrontiumsulphoaluminatecement(AScement)LowercalcinationtemperatureHigherSO3contentThedisadvantageousinfluenceofMgOcanbereduced
ResearchtheeffectofMgOonthecomposition,structureandpropertiesofalite-calciumstrontiumsulphoaluminatecementServetheproductionofcementaswellasmoreefficientuseoflow-qualityhigh-magnesiumlimestoneIntroduction
ExperimentComposition/%Aluminium
ratioSilicon
ratioSaturationcoefficientoflimeC3SC2SC3AC4AFC2.75B1.25A359.2414.227.499.9991.52.50.92Table1MineralcompositionoftheclinkerThePortlandcementwiththeadditionof4%and5%MgOweresynthesizedforcomparisonContentsofMgO1%,2%,3%,4%,5%,6%,7%
ResultsanddiscussionNo.w(MgO)/%w(f-CaO)/%Compressivestrength/MPaExpansionratio/%3d28dA000.4855.296.70.147A110.4162.299.80.138A220.3864.3103.60.171A330.4363.2101.20.240A440.4561.897.90.373A550.4660.196.00.428A660.5351.289.50.738A770.5943.973.71.373S440.7250.487.90.556S550.7849.688.30.692Table2EffectofMgOcontentonthecementperformances●InfluenceofMgOonthePropertiesofCement
■C3S●C1.5Sr2.5A3◆C2S▼C4AF▲C3AFig.1X-raydiffraction(XRD)patternsofclinkers●XRDanalysisofclinkers
●SEM-EDSanalysisofclinkersFig.2SEM–EDSofsilicatemineralsinclinkerA2(a)SEMofA2clinker(b)C3Satpoint1
(a)SEMofA2clinker(b)C1.5Sr2.5A3atpoint2Fig.3SEM–EDSofC1.5Sr2.5A3inclinkerA2
(a)SEMofA7clinker(b)C1.5Sr2.5A3atpoint2Fig.4SEM–EDSofC1.5Sr2.5A3inclinkerA7
PetrographyanalysisofclinkersA0A2S5A5Fig.5
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