废弃混凝土中的硬化水泥浆体是资源、能源消耗最大、环境负荷最重、经济成本最高的部分，本文研究了硅酸盐脱水相的制备及其相关表征，研究表明，硬化后的水泥浆体在经过煅烧处理后能得到一种名为硅酸盐脱水相的物质，该物质遇水后能再次发生水化反应而得到具有强度的硬化结构体，其中以650℃煅烧温度下得到的硬化水泥浆体脱水相水化后强度最大。同时，还对硅酸盐脱水相-硅微粉系的性能进行了研究，为改善脱水相的强度，加入硅微粉进行了改性，发现加入硅微粉后有强度增加的趋势。%The hardened cement paste in waste concrete is the part of the largest energy and resource consumption, the worst environmental impact and the most economic costs. The preparation of silicate dehydration phase and characteri-zation are studied. The results show that a material called silicate dehydration phase can be obtained from the hardened cement paste after calcination, and rehydration hardening structure is obtained by adding silicate dehydration phase sub-stance and water. The biggest rehydration strength of hardened cement paste dehydration phase is derived at 650℃. The research on performance of silicate dehydration phase-silica powder is studied. In order to improve the strength of dehy-dration phase, the modification for adding silica powder is carried out, the strength is improved after adding microsilica powder.
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