Research Progress of Hydration Mechanism of Belite-Calcium Barium Sulphoaluminate Cement

Belite-calcium barium sulphoaluminate cement is a new type of cementitious material.Compared with belite cement the cement has a high hydration rate,short setting time,little water need,and good corrosion resistance.This paper mainly discussed the hydration mechanism of calcium barium sulphoaluminate mineral,belite cement and belite-calcium barium sulphoaluminate cement.The results show that increasing amount of gypsum can improve the hydration rate,increase the formation amount of AFt in the early hydration period and benefit to the improvement of early strength.The hydrate of belite-calcium barium sulphoaluminate cement is the same with Portland cement,but the AFt content is increased and the Ca(OH)2 content is reduced.Compared with Portland cement the early hydration reaction rate of the cement is low and the hydration heat is also decreased.