铜尾矿在制备蒸压加气混凝土砌块综合利用技术研究  

Research on comprehensive utilization technology of copper tailings in preparation of autoclaved aerated concrete block

作　　者：曾兴华 ZENG Xing-hua

机构地区：[1]江西省建筑材料工业科学研究设计院,江西南昌330001

出　　处：《砖瓦》2018年第10期71-73,共3页Brick-tile

摘　　要：实现铜尾矿回收利用意义重大。试验用铜尾矿中SiO_2含量较低,为29.41%,需复合天然砂作为制备蒸压加气混凝土的硅质材料,铜尾矿与天然砂的比例为1:1.7。得出了制备蒸压加气混凝土砌块的最佳配比,在蒸压釜(蒸汽压力1.3MPa、温度198℃)中恒压养护6h,制备的铜尾矿蒸压加气混凝土砌块的抗压强度达4.2MPa,密度为615kg/m^3,满足GB11968-2006《蒸压加气混凝土砌块》A3.5B06等级产品对强度和密度指标的要求。The realization of copper tailings recycling is of great significance. The copper tailings used in the test have a low SiO2 content of 29.41%. The composite natural sand is required as the siliceous material for preparing autoclaved aerated concrete, and the ratio of copper tailings to natural sand is 1：1.7. The optimum ratio of the prepared autoclaved aerated concrete block is obtained. The autoclaved aerated concrete block of the copper tailings is prepared by constant pressure curing for 6 h in an autoclave （steam pressure 1.3 MPa, temperature 198°C）. The compressive strength is 4.2 MPa and the density is 615 kg/m3, which meets the requirements of the strength and density indicators of the A3.5B06 grade of GB11968-2006“Autoclaved aerated concrete blocks”.

关 键 词：铜尾矿 含硅量 蒸压加气混凝土砌块 研究 

分 类 号：TU522.3[建筑科学—建筑技术科学]