这些模具应由不会与含有硅酸盐水泥的混凝土发生反应的材料制成。
They shall be made of materials that do not react with concrete containing Portland cement.
以硅粉取代部分普通硅酸盐水泥，对混凝土性能改善效果最好。
By substituting silica powder for ordinary Portland cement, the performance of the concrete can be best improved.
上述研究结果对于采用普通硅酸盐水泥生产超轻泡沫混凝土具有一定的指导作用。
The results of the study had a role of guiding the production of product the super-ligh foamed concrete with ordinary Portland cement.
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