物理化学在水泥基材料中的应用.docx

2012年1月January，2012JOURNALOFTHECHINESECERAMICSOCIETY物理化学在水泥基材料中的应用DenisDAMIDOT1,2(1.UniversityLilleNorddeFrance,59000Lille,France;2.EMDouai,LGCgE-MPE-GCE,59508Douai,France)摘要：热力学和动力学可用于水泥基材料尤其是水泥浆体设计中。热力学的应用便于选择水泥浆体需要的化学组分，使得该材料具有宏观孔隙的特殊相组合，而动力学的应用，一方面可以提高早期水泥水化过程中的水化率，另一方面可以调节该材料的宏观孔隙的分布。对于含有水化硅酸钙的水泥浆体，控制晶核形成和生长的速率有助于改变细观孔隙的分布。因此，应用热力学和动力学研究水泥基材料的物理化学特性，可以大大改善这些材料的微观结构和最终的物理力学性质。关键词：孔隙度；水泥浆体；水化作用；热力学；溶解；沉淀中图分类号：TQ172文献标志码：A文章编号：0454–5648(2012)01–0001–06DOI：CNKI:11-2310/TQ1907.001网络出版时间：2011–12–2919:07:42网络出版地址：/kcms/detail/11.2310.TQ1907.001.htmlPhysico-ChemistryAppliedtoCement-BasedMaterialsDenisDAMIDOT1,2(1.UniversityLilleNorddeFrance,59000Lille,France;2.EMDouai,LGCgE-MPE-GCE,59508Douai,France)Abstract:Thermodynamicsandkineticsappliedtocement-basedmaterialsandespeciallytocementpasteareverypowerfulinordertodesignbetterengineeredandmoresustainableconstructionmaterials.Indeedthermodynamicsenablestochoosetherequiredchemicalcompositioninordertoreachspecificphaseassemblageswithadefinedmacro-porosity.Ontheotherhand,controllingthekineticsisessentialfirsttoreachhighpercentageofreactionduringcementhydrationatshortages,andsecond,totunetheporesizedistributionofmacro-porosity.Inthecaseofcementpastesthatcontaincalciumsilicatehydrate,meso-porositycanalsobemodifiedthankstothecontroloftherateofnucleationrelativetotheoneofgrowth.Asaconsequence,masteringphysico-chemistryofcementbasedconstructionmaterialsusingthermodynamicsandkineticsappearstobeagreatopportunitytoimprovemarkedlythemicro-structureandthusthefinalpropertiesofthesematerials.Keywords:porosities;cementpaste;hydration;thermodynamics;dissolution;precipitationmaterial.Thesechemicalreactionsthataregenerallytermedascementhydrationproceedthroughadissolu-tion-precipitationprocessasexplainedalongtimeagoby1IntroductionConstructionmaterialsarecomplexmaterialshavingpropertiesthatmostlyrelyontheirmicrostructure.Thusabetterengineeredmicrostructurethroughaglobalmate-rialbydesignapproachisessentialtoimprovetheprop-er