Structure and pozzolanic activity of calcined coal gangue during the process of mechanical activation

Wei Guo; Dongxu Li; Jianhua Chen; Nanru Yang

doi:10.1007/s11595-009-2326-7

Journal of Wuhan University of Technology Materials Science Edition ›› 2009, Vol. 24 ›› Issue (2) : 326 -329. DOI: 10.1007/s11595-009-2326-7

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Structure and pozzolanic activity of calcined coal gangue during the process of mechanical activation

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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.

Keywords

coal gangue / mechanical activation / structure / NMR / tetrahedron

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Wei Guo, Dongxu Li, Jianhua Chen, Nanru Yang. Structure and pozzolanic activity of calcined coal gangue during the process of mechanical activation. Journal of Wuhan University of Technology Materials Science Edition, 2009, 24(2): 326-329 DOI:10.1007/s11595-009-2326-7

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