活化煤矸石生态型混凝土长期性能及水化特性的研究  

Long-term Performance and Hydration Characteristics of Activated Coal Gangue Ecological Concrete

作　　者：赵旭东 刘开志 陈杰[1,2] 覃宇坤 陈祎明 赵宇航 肖勋光 水中和[2,3] ZHAO Xudong;LIU Kaizhi;CHEN Jie;QIN Yukun;CHEN Yiming;ZHAO Yuhang;XIAO Xunguang;SHUI Zhonghe(School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China;State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China;Wuhan University of Technology Advanced Engineering Technology Research Institute of Zhongshan City, Zhongshan 528437, China)

机构地区：[1]武汉理工大学材料科学与工程学院,武汉430070 [2]武汉理工大学建筑硅酸盐材料国家重点实验室,武汉430070 [3]中山市武汉理工大学先进工程技术研究院,中山528437

出　　处：《硅酸盐通报》2020年第6期1757-1764,共8页Bulletin of the Chinese Ceramic Society

基　　金：广东省中山市重大科技专项(2017A1021);2017年广东省省级科技计划(协同创新与平台环境建设2017B090907009);中山市武汉理工大学先进工程技术研究院公开研究项目(WUT201802)。

摘　　要：以煅烧煤矸石为掺合料配制了一种煤矸石基生态型混凝土,并与普通硅酸盐水泥和传统矿渣水泥配制的混凝土进行了性能对比。系统地评价了其力学性能发展规律、体积稳定性(湿胀和干缩)及抗硫酸盐侵蚀能力,同时对煤矸石体系、普通硅酸盐水泥体系和矿渣体系的水化特性及主要水化产物进行了系统的表征分析。结果表明,活化煤矸石生态型混凝土力学性能可以达到传统矿渣水泥混凝土同一水平。同时,煤矸石水泥对混凝土的体积稳定性有一定的劣化,但能显著增强其抗硫酸盐侵蚀能力。煅烧煤矸石具有一定的火山灰活性,其体系中C-S-H凝胶主要以C-S-H(Ⅰ)为主,平均Ca/Si比为1.39。Calcined coal gangue was used as admixture to make coal gangue based ecological concrete,which was compared with ordinary Portland concrete and traditional slag concrete.The strength development,volume stability(wet expansion and dry shrinkage)and sulphate resistance of concrete were systematically evaluated.Simultaneously,the main hydration products of coal gangue system,ordinary Portland cement system and slag system were analyzed.The results show that the mechanical properties of activated coal gangue modified concrete reach the same level as that of slag blended concrete.Furthermore,coal gangue cement decreases the volume stability of concrete in some degree,but significantly enhances sulfate resistance.Calcined coal gangue has certain pozzolanic activity.The C-S-H gels in this system is mainly C-S-H(Ⅰ),with an average Ca/Si ratio of 1.39.

关 键 词：活化煤矸石 力学性能 体积稳定性 抗硫酸盐侵蚀 C-S-H凝胶 

分 类 号：TU528[建筑科学—建筑技术科学]