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苏联研究了三种利用明矾石生产自应力水泥的方法:第一种方法是在500—700℃下焙烧明矾石、硅酸盐水泥和石膏;第二种方法是以磺化明矾石熟料、硅酸盐水泥和石膏为基料;第三种方法则是焙烧并磨细由明矾石和石灰石组成的混合料。
The Soviet Union studied three methods of using alum to produce self-stressing cement: the first method is to roast alum, Portland cement and gypsum at 500-700°C; the second method is to sulfonate alumite clinker, Portland cement and gypsum are the base materials; the third method is to roast and grind the mixture consisting of alum and limestone.