在我国西部云贵地区配制混凝土用的砂粒度较细,因而配制如C30等级的混凝土,水泥用量大,且混凝土强度还不稳定。第十四冶金建设公司建材科研所经试验采用云南冶炼厂生产的废铜渣代替部分细砂,不但利用了废料,配制成强度合格的混凝土,还降低了水泥用量。例如:他们用425号矿渣水泥 In our country, Yunnan-Guizhou region preparation of concrete sand smaller size, and thus prepared as C30 grade concrete, large amount of cement, and the concrete strength is not stable. The fourteenth Metallurgical Construction Company Building Materials Research Institute tested Yunnan scrap smelting plant to replace some of the fine sand, not only the use of waste, formulated into strength concrete, but also reduces the amount of cement. For example: they use 425 slag cement