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基于硬化硅酸盐水泥浆体的Powers理论和水泥乳化沥青浆体的配合比,通过理论计算和X射线衍射(XRD)、扫描电子显微镜(SEM)、能量色散X射线谱仪(EDAX)等相分析方法,分析了硬化水泥乳化沥青浆体的物相组成与微结构.结果表明,硬化水泥乳化沥青浆体的物相组成与微结构取决于沥灰比和水灰比.提出了表征硬化水泥乳化沥青浆体物理结构的两种结构模型,以沥青为连续相、水泥相为分散相的有机-无机复合胶凝体结构模型—I型模型;以水泥相为基体、沥青嵌入其中的无机-有机复合胶凝体结构模型—II型模型.为深入分析高速铁路板式无砟轨道结构中水泥乳化沥青砂浆的微结构参数和力学性能及其衰变规律奠定了基础.
Based on the Powers theory of hardened Portland cement paste and the mix proportion of cement emulsified asphalt paste, theoretical calculations and X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDAX) The results show that the phase composition and microstructure of hardened cement emulsified asphalt slurry depend on the ratio of asphalt to cement and the ratio of water to cement.The paper presents a method to characterize the phase composition and microstructure of hardened cement emulsified asphalt slurry, Two kinds of structural models of the emulsified asphalt slurry physical structure, the organic-inorganic composite gel structure model-I model with asphalt as the continuous phase and the cement phase as the dispersed phase, the cement-based matrix with the asphalt embedded in the inorganic- Organic composite gel structure model-II model.This paper lays the foundation for in-depth analysis of microstructure parameters, mechanical properties and decay rules of cement emulsified asphalt mortar in high-speed railway slab track structure.