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在波特兰水泥中,石膏的作用是控制凝结时间和促进熟料硅酸盐相的水化。但是,水化硫铝酸钙是不稳定的新生物,其相转变产生应力,有时会使水泥石破坏。
In Portland cement, the role of gypsum is to control the setting time and promote hydration of the clinker silicate phase. However, hydration of calcium sulphoaluminate is an unstable new organism, and its phase transition produces stress that sometimes destroys the cement stone.