用低硅铜尾矿制备蒸压灰砂砖  

AUTOCLAVED SAND-LIME BRICKS FROM COPPER MINE TAILING WITH LOW SiO_2 CONTENT

作　　者：方永浩[1] 庞二波[1] 王锐[1] 宣文[1] 陈宇峰[2] 

机构地区：[1]河海大学力学与材料学院,南京210098 [2]南通大学建筑工程学院,江苏南通226019

出　　处：《硅酸盐学报》2010年第4期559-563,共5页Journal of The Chinese Ceramic Society

基　　金：国家科技支撑计划课题(子课题:2006BAJ04A04–02);江苏省自然科学基金(Bk2009345)资助项目

摘　　要：研究了配合料组成和成型、蒸养工艺参数对低硅铜尾矿蒸压灰砂砖力学性能的影响。通过掺加适量河砂粉,在175～190℃蒸压反应可制得铜尾矿蒸压砂砖,该砂砖的配合料中低硅铜尾矿用料达65%,物理力学性能符合GB11945—1999《蒸压灰砂砖》MU15蒸压灰砂砖的技术要求。X射线衍射和扫描电子显微镜分析结果表明:制备的铜尾矿蒸压灰砂砖中的主要反应产物为0.9nm托勃莫来石(Ca5Si6O18H2)、1.1nm托勃莫来石(Ca5Si6O17·5H2O)和1.4nm托勃莫来石(Ca5Si6O18H2·8H2O)晶体,铜尾矿中的钙铁榴石几乎不参与反应。The influences of ingredients and forming and autoclaving processes on the properties of autoclaved sand-lime brick from copper mine tailing with low SiO2 content were studied.The results show that it is possible to prepare autoclaved copper mine tailing-lime bricks meeting with the technical requirements of GB11945—1999 for MU 15 sand-lime bricks.The proportion of the copper mine tailing in the ingredient of the brick could be as high as 65%.X-ray diffraction and scanning electron microscope analyses show that the main reaction products in the brick are tobermorite crystals（0.9 nm Ca5Si6O18H2,1.1 nm Ca5Si6O17·5H2O,and 1.4 nm Ca5Si6O18H2·8H2O）.Andradite in the copper mine tail nearly does not take part in the reaction during the autoclaving process.

关 键 词：铜尾矿 灰砂砖 蒸压 托勃莫来石 钙铁榴石 

分 类 号：TU522[建筑科学—建筑技术科学]