Effects of Different Calcining Temperatures on the Properties of Ceramsite Prepared by High-carbon Gasification Slag  

作　　者：WU Feng LI Hui LI Taizhi MA Xudong 

机构地区：[1]College of Materials Science and Engineering,Xi’an University of Architecture and Technology,Xi’an,710055,China [2]State Key Laboratory of Green Building in Western China,Xi’an University of Architecture and Technology,Xi’an,710055,China [3]Shaanxi Ecological Cement&Concrete Engineering Technology Research Center,Xi’an,710055,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2023年第2期292-298,共7页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China (Z20180222);the Independent Research and Development project of State Key Laboratory of Green Building in Western China (LSZZ202021);the Natural Science Foundation of Shaanxi Provincial Department of Education (20JY041);the Qingyuan Science and Technology Plan Project (No.2020KJJH040)。

摘　　要：The structure and characteristics of high-performance lightweight aggregates produced by high-carbon gasification slag were investigated by X-ray diffraction,scanning electron microscopy,thermogravimetry/differential thermogravimetr,differential scanning calorimetry-Fourier transform infrared,and mercury intrusion porosimetry,respectively.The experimental results show that the ceramsite undergoes two weightless stages in the calcining process.With the increase in the calcining temperature,a large number of pores are formed inside the ceramsite,its structure becomes denser,but the calcining temperature band of the ceramsite becomes narrow.The crystalline phase of the ceramsite changes at different calcining temperatures and the mineral phase changes from the earlieralbite,quartz,oligoclase,hematite,etc,to a silica-aluminum-rich glass phase.The 1130℃ is a more suitable calcining temperature,and the cylinder compressive strength of ceramics is 11.59 MPa,the packing density,apparent density,porosity,and water absorption are 939.11 kg/m^(3),1643.75 kg/m^(3),28.11%,and 10.35%,respectively,which can meet the standards for high-strength lightweight aggregates.

关 键 词：high-carbon gasification slag CERAMSITE CONCRETE physical property 

分 类 号：TQ174.71[化学工程—陶瓷工业] X784[化学工程—硅酸盐工业]