还有用沙子的混凝土吗?
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混凝土的四组分:水泥,沙子,石子,空气(很少一部分)。
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如果混凝土包含水泥,那水泥又是用什么生产出来的?一直以为混凝土=水泥。
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简单地说,水泥是石灰石(碳酸钙),加热到1450度左右,分解成氧化钙,同时添加一点其它的相应成分补齐,就形成了水泥。
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