铜尾矿与陶瓷抛光泥复合蒸压加气混凝土的制备及其性能研究  

PREPARATION AND PROPERTIES OF COPPER TAILINGS AND CERAMIC POLISHING MUD BY AUTOCLAVED AERATED CONCRETE

作　　者：田键[1,2] 鲁锋 陈坤 苑跃辉[1] TIAN Jian;LU Feng;CHEN Kun;YUAN Yue-hui(College of Materials Science and Engineering,Hubei University,Wuhan 430062,China;Tianshu Industrial Research and Design Institute of New Energy Materials Hubei University,Wuhan 430062,China)

机构地区：[1]湖北大学材料科学与工程学院,武汉430062 [2]湖北大学天沭新能源材料工业研究设计院,武汉430062

出　　处：《环境工程》2020年第1期157-161,共5页Environmental Engineering

基　　金：国家自然科学基金项目(21571056)

摘　　要：利用废弃物铜尾矿与抛光泥复合取代粉煤灰,与水泥、石灰、石膏等材料制备蒸压加气混凝土。重点研究了铜尾矿与陶瓷抛光泥的颗粒细度、掺加量、工艺参数等对蒸压加气混凝土砌块抗压强度、绝干密度等性能的影响,通过XRD、SEM对其微观机理进行研究。结果表明:铜尾矿与抛光泥粉磨时间为20 min时,铜尾矿的比表面积达到244.5 m2/kg,抛光泥比表面积为350.4 m2/kg。原材料中铜尾矿、抛光泥、水泥、石灰、石膏的质量比为45∶20∶10∶22∶3时,制备的砌块最大抗压强度达到5.1 MPa,平均抗压强度达到4.7 MPa,绝干密度低于625 kg/m3,达到A3.5,B06的蒸压加气混凝土砌块的要求。砌块中的托贝莫来石与C-S-H(B)等水化产物与未反应的石英相互致密穿插,使砌块的微观孔结构更加致密,砌块的抗压强度更高。In this paper,a compound was made from copper tailing and polishing mud to replace fly ash and then add the cement,lime,gypsum and other materials to prepare the autoclaved aerated concrete.The influence of particle fineness,dosage and technological parameters on the compressive strength and dry density of autoclaved aerated concrete block was studied.The microscopic mechanism was studied by XRD and SEM.The experimental results showed that when copper tailing and ceramic polishing mud were grinding for 20 min,the surface area of copper tailing and ceramic polishing mad were 244.5 m 2/kg and 350.4 m 2/kg.With the mixing ratio of raw materials for copper tailings was polishing mud∶cement∶lime∶gypsum=45∶20∶10∶22∶3,the maximum compressive strength of the block reached 5.1 MPa,the average compressive strength reached 4.7 MPa,and the dry density was less than 625 kg/m 3,complete complied with the requirements of autoclaved aerated concrete block of A3.5 B06.Tobermorite,C-S-H(B)and other hydration products in the block was closely interposed with unreacted quartz,which made the microcosmic pore structure of the block more compacter and the compressive strength higher.

关 键 词：铜尾矿 抛光泥 加气混凝土 复合掺量 水化机理 

分 类 号：TU528[建筑科学—建筑技术科学]