Thermal-Activation & Activity Analysis of Neimenggu High Alumina Coal Gangue

Abstract:

In this paper, the Neimenggu high alumina coal gangue was calcined at 400°C~1000°C, its micro-structure in different calcining temperature was studied using XRD and IR, and then the preferred activated condition and the PAI were investigated by testing the strength of cement mortars with activated coal gangue. The result shows that: the optimal calcining temperature of the gangue is 800°C, at this temperature the high activated SiO₂ and AI₂O₃ can be decomposed from the gangue. The activity of the original gangue is very high, the PAI of the cement mortars with 800°C activated coal gangue can achieve to 126%, and thus can be used as high activity cement admixture. The PAI of the high alumina gangue is higher than that of coal gangue from other parts of China.

• Periodical: Applied Mechanics and Materials (Volumes 198-199)
• Pages: 9-13
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.198-199.9
• Online since: September 2012
• Authors: Hai Li Cheng, Fei Hua Yang, Jie Zhang, Yi Wang
• Keywords: High Alumina Coal Gangue, PAI, Spectral Analysis, Thermal Activation

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