煅烧制度对煤矸石活化性能的影响  

Effects of Calcination System on Activation Performance of Coal Gangue

作　　者：宋旭艳[1] 韩静云[1] 郜志海[1] 

机构地区：[1]苏州科技学院土木工程学院,215011

出　　处：《混凝土与水泥制品》2011年第10期23-26,共4页China Concrete and Cement Products

基　　金：国家"十一五"科技支撑计划合作项目(Z1201);苏州市建设系统科研项目(Z1574);校科研基金项目(Z1516)

摘　　要：以江苏宜兴产煤矸石为研究对象,对其基本物性进行分析可知,煤矸石的矿物组分以高岭石和石英为主。将煤矸石于不同煅烧温度和不同保温时间下进行活化,利用X射线衍射分析(XRD)和力学强度试验对其活化过程进行研究。结果显示,随着煅烧温度和保温时间的增加,高岭石的分解趋于完全,活化煤矸石水泥强度增加;但煅烧温度过高、保温时间过长,无定形矿物会向稳定状态转变,活性降低。煅烧温度为750℃、保温4h时煅烧煤矸石的活化性能较好。Taking the coal gangue from Jiangsu Yixing as research object, from the basic performance analysis on it, it shows that the coal gangue＇s mineral compositions are chiefly kaolinite and quartz. Coal gangue can be activated at different calcination temperature and different holding time. The activation process is studied by using X-ray diffraction （XRD） analysis and mechanical strength test. The results show that with increasing of calcination temperature and holding time, the decomposition of kaolinite tends to be complete and the strength of activated coal gangue cement is improved. However, when calcination temperature is too high and holding time is too long, the structure of amorphous minerals turns into steady state and its activity is reduced. The activation performance of coal gangue can be better when it is calcined at 750℃ and hold for 4 hours.

关 键 词：煤矸石 煅烧制度 活化性能 XRD分析 水化过程 

分 类 号：TU528[建筑科学—建筑技术科学]