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《Journal of Hubei University(Natural Science)》 2018-01
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Study on application of silica mud to autoclaved aerated concrete

TIAN Jian;CHEN Kun;YE Bin;ZHU Yanchao;School of Materials Science and Engineering,Hubei University;Hubei University Tianshu Industrial Research and Design Institute of New Energy Materials;  
Using the abandoned tailings silica mud,instead of river sand,with cement,lime,gypsum and other materials to prepare the autoclaved aerated concrete.The effects of specific surface area and content of silica mud on the compressive strength and dry density of autoclaved aerated concrete blocks were studied,the microscopic mechanism of the formation of autoclaved aerated concrete blocks was studied by XRD and SEM.The experimental results show that the silicon mud grinding 20 min and the surface area is 358.1 m~2·kg~(-1),the proportion of raw material for silicon mud∶cement∶lime∶gypsum=60∶12∶25∶3,the test block strength up to 5 MPa,the average compressive strength of 4 MPa and above,in full compliance with the A3.5requirements of aerated concrete block table;the apparent density is less than 625 g·cm~(-3),has reached B06level;The strength of the block was enhanced by the way of cementation which include C-S-H gel、tobermorite and unreacted quartz.
【Fund】: 国家自然科学基金重点项目(21571056);; 湖北省重大科技创新计划项目(2014ACA042)资助
【CateGory Index】: TU528
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