Research on cementitious behavior and mechanism of pozzolanic cement with coal gangue |
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| Authors: | Dongxu Li Xuyan Song Zhihua Pan |
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| Affiliation: | a College of Material Science and Engineering, Nanjing University of Technology, New Mofan Road, No.5, Nanjing 210009, People's Republic of China
b Department of Civil Engineering, University of Science and Technology of Suzhou, Binhe Road, No.1701, Outskirt of Suzhou 215011, People's Republic of China |
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| Abstract: | In this paper, the mechanical property of coal gangue in the activatory process is studied by using the method of orthogonal experiment, and then the micromechanism of various coal gangues is determined by modern test methods such as scanning electron microscope (SEM) and nuclear magnetic resonance (NMR). The experiment can approve those results: when proper amount of gypsum and fluorite were taken as for mineralizer in the course of calcinations of added-calcium coal gangue, much micropore can appear in microstructure and it can be in more molten state; spectrum peak of 29Si in this kind of coal gangue is not only in splitting decomposition, but also in broadening; the mechanical property of coal gangue calcined with calcium is in accordance with microstructure. |
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| Keywords: | Coal gangue Orthogonal design Scanning electron microscope Nuclear magnetic resonance Si-O polyhedron |
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