复合混凝土胶浆-集料界面区微观结构特征

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1、复合混凝土（全文都用这个名称）胶浆-集料界面区微观结构特征摘要：界面特征直接影响复合材料性能。针对半刚性面层复合材料与乳化沥青混凝土材料浆体-集料界面区微观结构特征的不同，采用SEM等微观测试手段，对复合材料浆体-集料界面区微观结构进行研究，提出结构特征。结果表明，与乳化沥青浆体相比，水泥乳化沥青复合浆体表面存在许多突起，主要由沥青包裹的矿粉与未水化水泥组成的粒状颗粒和C-S-H凝胶及自由沥青构成，并相互交织；水泥、矿粉等无机填料没有与乳化沥青破乳产生的沥青发生明显反应。在复合材料表面，浆体结构疏松，与集料表面距离较大，存在明显浆体-集料界面；在复合材料内部，集料表面浆体光滑，沥青数量较多，

2、然后是致密的复合浆体结构，存在大量簇状的C-S-H凝胶，沥青数量较少；到集料表面距离不同，复合浆体中所含Si、Ca等元素原子比和质量比发生变化。水泥能够明显改善复合材料界面区微观结构。关键词：半刚性面层复合材料，水泥乳化沥青复合浆体，浆体-集料界面区，结构特征Micro-structurecharactersofinterfacezonebetweenmortarandaggregateinsemi-rigidpavementcompositematerialAbstract:Interfacecharacter.hasadirectinfluenceonperformanceofcompo

3、sitematerial.Directingagainstdifferencesofinterfacezonemicro-structureinsemi-rigidpavementcompositematerialandemulsifiedasphaltconcretematerial,theauthorsadoptedsomemicroapparatuses,suchasSEM,tostudytheinterfacezoneofthecompositematerialandputforwardthestructurecharactersofinterfacezone.Theresultsi

4、ndicatethatincontrasttotheemulsifiedasphaltmortar,therearemanytubersonsurfaceofcementemulsifiedasphaltcompositemortar,whicharecomposedofmineralpowderpackedbyasphalt,nonhydrationcementparticle,C-S-Hgelandfreeasphalt.Furthermore,theyinterleaveoneanother.Thereisnoevidentreactionbetweeninorganicfillers

5、,suchascementandmineralpowder,andasphaltfromemulsifiedasphaltde-emulsion.Onsurfaceofthecompositematerial,thereexistsloosecompositemortar,bigdistancefromtheaggregatetothecompositemortarandevidentinterfacebetweenaggregateandmortar.Inthecompositematerial,therearesmoothmortarandmuchasphaltontheaggregat

6、esurface.ThenacompactcompositemortarstructurecomesonwhichtherearemuchclustershapeC-S-Hgelandlittleasphalt.TheatomandthemasspercentageofSiandCachangewiththechangeofdistancefromtheaggregatetothecompositemortar.TheordinaryPortlandcementhasanevidentmendfunctiononmicro-structureofinterfacezoneinsemi-rig

7、idpavementcompositematerial.Keywords:semi-rigidpavementcompositematerial;cementemulsifiedasphaltcompositemortar;interfacezonebetweenmortarandaggregate;structurecharacter99浆体-集料界面区微观结构对混凝土材料力学性能和耐久性能产生较大影响，已