Structure and pozzolanic activity of calcined coal gangue during the process of mechanical activation |
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| Authors: | Wei Guo Dongxu Li Jianhua Chen Nanru Yang |
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| Affiliation: | (1) Department of Material Engineering, Yancheng Institute of Technology, Yancheng, 224051, China;(2) Institute of Material Science and Engineering, Nanjing University of Technology, Nanjing, 210009, China;(3) Department of Chemistry and Materials Engineering, Changshu Institute of Technology, Changshu, 215500, China |
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| Abstract: | On the basis of analyzing coal gangue’s chemical and mineral compositions, the structure change of coal gangue during the mechanical activation was investigated by XRD, FTIR, NMR, and the mechanical strength of the cement doped coal gangue with various specific surface area was tested. The experimental results indicate that, the lattice structure of metakaolin in coal gangue samples calcined at 700 °C disorganizes gradually and becomes disordered, and the lattice structure of α-quartz is distorted slightly. The pozzolanic activity of the coal gangue increases obviously with its structural disorganization. Funded by the Key Laboratory Foundation of Ecological-Environment Materials (Yancheng Institute of Technology) of Jiangsu Province (XKY2006020), and the Natural Science Foundation of Jiangsu Provincial Education Department(07KJB430123) |
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| Keywords: | coal gangue mechanical activation structure NMR tetrahedron |
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