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水泥乳化沥青复合胶浆微观结构特征

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Keywords: 道路工程,水泥乳化沥青复合胶浆,粉胶比,填料,结构特征,微观分析

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Abstract:

采用扫描电镜(SEM)、红外光谱(IR)和电子能谱(EDXA)等微观试验手段,对由不同粉胶比(质量比)、不同类型水泥和不同岩性填料构成的水泥乳化沥青复合胶浆进行研究,给出复合胶浆微观结构特征。结果表明水泥乳化沥青复合胶浆由沥青包裹的矿粉与未水化水泥组成的粒状颗粒和纤维状水泥水化产物水化硅酸钙(C-S-H)凝胶、晶状氢氧化钙(CH)等构成;粒状颗粒、C-S-H凝胶和自由沥青相互交织,构成一种空间网络结构;当粉胶比为1.1时,胶浆表面C-S-H凝胶较多,胶浆结构致密,孔隙分布均匀;不同粉胶比复合胶浆中,各有机基团之间或与无机化合物间没有新键生成;石灰岩矿粉、较高强度水泥以及合理的粉胶比有利于复合胶浆微观结构的改善。

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