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1、土木工程材料复习题whut版(ReviewofcivilengineeringmaterialswhutEdition)Waterresistanceindexofmaterials?Requirementsformaterialwaterproofstructureoftencomeintocontactwithwaterintheindex?Answer:thesofteningcoefficientismorethan0.85.forthegeneralstructureshouldbegreaterthan0.75.Requirements
2、ofwallmaterialthermalperformanceindexAnswer:smallthermalconductivity,goodthermalinsulation.Highspecificheatcapacity,hightemperaturestability.Characteristicsofquicklimeripening"Chenvolt"?Purpose?Answer:(1)theheatreleaseislargeandrapid.Volumeexpansionislarge,upto1~2.5timesChenFu
3、:Limedigesterat2~3weeks,andcoveredwithwater.Objective:inordertoeliminatetheharmofburnedlime,makefullhydration.ThenatureofarchitecturalgypsumAnswer:fastsettingandhardening,hydrationhardeninghighporositylowstrength,heatinsulation,soundinsulationandsoundabsorptionperformanceisgoo
4、d,butpoorwaterresistance;goodfireproofperformance;hardeningvolumeslightlyexpanded,gooddecoration;theadjustmentoftemperatureandwet;constructionisverygood.MineralcompositionofcementclinkerEngineeringpropertiesofvariousmineralsAnswer:three,twocalciumsilicatecalciumsilicate,alumin
5、ate,calciumthreeferritealuminatefourcalcium.Themineralpropertiesofcementclinker:threecalciumaluminate,hydrationandhardeningspeedisthefastest,28dhydrationheatreleaseisthemost,andthestrengthisthelowest;calciumsilicatetwocalciumhydrationandhardeningrateistheslowest,28dheatrelease
6、istheleast,thestrengthislowearly,latehigh.Improvethecontentofthreecalciumsilicate,canbemadeofhighstrengthcement;improvethecontentofthreecalciumaluminateandsilicatecalciumthree,canproducefasthardcement;reducethecontentofcalciumsilicateandaluminatethreethreecalciumsilicatecalciu
7、m,increasethecontentoftwo,canbepreparedinlowheatcement;improvethecontentofironandaluminumacidfourcalcium,reducethecontentofthreecalciumaluminatecementroad,canbeprepared.Whatisthepurposeofproducingcementandgypsum?StructurecompositionofcementstoneAnswer:adjustthehardeningrateofc
8、ement,thecementsettingdelay.SoundnessofcementvolumeThecauseof