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针对碱-矿渣水泥水化产物中不存在Ca(OH)2且碳化比较严重的现象,选择水玻璃和NaOH作碱组分,采用X-射线衍射仪和可变真空扫描电子电镜研究了碱-矿渣水泥浆体的碳化产物和微观形貌,结合氮吸附方法分析了碳化对碱-矿渣水泥浆体孔结构的影响.结果表明:碱-矿渣水泥浆体的碳化是CO2直接和水化硅酸钙(C-S-H)凝胶发生作用的结果,碳化后生成的碳酸钙主要以方解石的形式存在;碳化后,C-S-H凝胶的Ca与Si原子比降低,浆体的比表面积增大,平均孔径降低,而累积孔体积的变化情况和碱组分有关.
In view of the absence of Ca (OH) 2 in the hydration product of alkali-slag cement and the more severe carbonation phenomenon, sodium silicate and NaOH were selected as the alkali components. The structure of alkali-slag cement hydration products was studied by X-ray diffraction and variable- The effects of carbonation on the pore structure of alkali-slag cement slurry were analyzed by carbonation products and microstructure of slag cement slurry.The results showed that the carbonization of alkali-slag cement slurry was the direct and hydrated silicic acid Calcium carbonate (CSH) gel generated after the results of the formation of calcium carbonate mainly calcite in the form of existence; after carbonization, CSH gel Ca and Si atomic ratio decreased, the slurry of the specific surface area increases, the average pore size decreases, The accumulation of pore volume changes and alkali components.