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用X射线衍射分析、水化热的测量、化学结合水量的测定、孔结构的测定、扫描电镜观察及强度测试研究了钢渣的水化产物的特性。结果表明:钢渣硬化浆体中主要含有水化硅酸钙(C–S–H)凝胶、Ca(OH)2、惰性组分[RO相、铁酸二钙(C2F)和Fe3O4]和未水化的胶凝相[硅酸三钙(C3S)和硅酸二钙(C2S)];总体而言,钢渣的水化过程与水泥的水化过程相似;钢渣早期的水化速率远低于水泥,但钢渣后期,尤其是90d之后的水化速率高于水泥的。钢渣水化产生的C–S–H凝胶不具有良好的胶凝性能,凝胶之间的相互黏结也不牢固,因此钢渣砂浆的强度很低。
The characteristics of hydration products of steel slag were studied by X-ray diffraction analysis, hydration heat measurement, determination of the amount of chemically bound water, pore structure determination, scanning electron microscopy and intensity measurement. The results show that the hardened steel slag mainly contains C-S-H gel, Ca (OH) 2, inert components [RO phase, dicalcium Hydrated gelling phase [Tricalcium Silicate (C3S) and Dicalcium Silicate (C2S)]; Overall, the hydration process of steel slag is similar to that of cement; the early hydration rate of steel slag is much lower than Cement, but the latter part of the slag, especially after 90d hydration rate higher than cement. The C-S-H gel produced by the slag hydration does not have good gelling properties, and the mutual bonding of the gels is also not strong, so the strength of the slag mortar is low.