Effects and mechanism research of the crystalline state for the semi-crystalline calcium silicate

Semi-crystalline silicates have wide varieties and are used in a wide range of fields for their unstable crystalline degrees. The crystalline state largely depends on the synthesis time, temperature and nucleation promoter. In this paper, the above three parameters have been researched. With different synthesis temperatures, the active calcium silicate, xonotlite and the intermediate products have been simulated. After that, the crystalline process has been tracked from 1 h to 8 h. A model of calcium silicate formation process has been set up based on the time and temperature experiments. Finally, a nucleation promoter, aluminum, has been added into the synthesis process. The crystalline degree is greatly increased with the aluminum addition. When the aluminum and silicate rate is 0.1, the crystalline degree is above 70% after 1 h.