混凝土的熱特性與再生利用研究.pdf

1、武漢理工大學(xué)碩士學(xué)位論文混凝土的熱特性與再生利用研究姓名：曹蓓蓓申請(qǐng)學(xué)位級(jí)別：碩士專(zhuān)業(yè)：材料物理與化學(xué)指導(dǎo)教師：水中和20060501AbstractWasteconcrete(wC)havebrou曲tintonegativeinfluencestoenvironmentItisneedforsocialsustainingdevelopmenttomakerecycledconcrete(RC)withWCbrokenasrecyc

2、ledaggregateWhiletheOldwasteconcreteisusedasrecycledconcreteaggregate(RCA)，thepoorworkabilityoffreshrecyclingconcreteduetothehi曲wateradsorptionofRCAmakesitswideapplicationlimitedIntheotherhand，thefineaggregatesofRCAsmall

3、erthan475mm，whichweregottenbygrindingandclassification，werealwaysabandonedaswaste，becausetheywerealmostconsideredasnopracticaluseasfortheinfluenceoftheworkabilityoffeshrecyclingconcreteInordertoimprovethequalityofRCA，inc

4、reasetherecyclingefficiencyandovercomesomeflawsofRCA，thetechnologywayofthermalgrindingandvibrationwasusedinthisresearchwork，bythisway，wecarlseparatetheaggregatesfromhydratedgelcomponents，getoriginalstateaggregatesandheat

5、activityconcretepowders，eventuallygethighqualityoriginalstateaggregatesanddrymixedmortarbyoursuitabletreatmentTogettheoptimalseparationtemperature，theWorkhorse一1thermalexpansioninstrumentwasconductedtOmeasurethelinearexp

6、ansionvaluesofdifferentcementmortarsandsomenormalaggregateTheresultsshowedthatthegreatestdivergenceofthermalexpansionbetweenhardenedcementpasteandaggregateliedbetween500℃to600℃whenthewasteconcretewassubjectedtotheelevate

7、dtemperatureThehi曲temperaturemechanicaltestinstrumentwasusedtomeasureconcretestrengthchangesunderdifferenttemperaturepointsfromroomtemperaturetO590。CItwasfoundthattheconcretestrengthat550。Cwasjust10％to14％ofconcretestreng

8、thatroomtemperatureAtthesametime，ThehydratingandhardeningperformanceofdehydratedcementpasteswasalsoinvestigatedtofindoutthatthestrenIgthofrehydrationproductswerethehi曲estwhentheseparatedwastemortarwereexperiencedtO600。CI