The mechanism study of ultra-fine fly ash sintered material performance |
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Authors: | Xu Zifang Gui Can Ma Jun Xie Yihan |
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Affiliation: | 1. School of Material Science and Engineering, Anhui university of Science and Technology, Anhui Huainan, Chinazhfxu@aust.edu.cn;3. School of Material Science and Engineering, Anhui university of Science and Technology, Anhui Huainan, China |
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Abstract: | AbstractIn view of production of fly ash and coal gangue is very large, much attention has been paid to the problem of its resource utilization. Using ultra-fine fly ash, coal gangue and clay to roast into lamellose brick at different temperatures by certain proportion, at the same time, using fly ash to replace ultra-fine fly ash as the contrast group. In addition, we have been further studied it by using XRD, SEM, TG-DTA and other means. This article studies the superiority of using ultra-fine fly ash and coal gangue instead of clay to roast into brick and the mechanism of ultra-fine fly ash sintered material. Research shows that: the brick mixed with ultra-fine fly ash than an equal amount of fly ash has better physical properties after roasting 100?min in 100?°C. Bibulous rate can reach 10%; compressive strength reaches MU30 high-class level; Thermal coefficient of conduction is 0.41 W/(m·K).There are significant characteristics peaks of quartz and mullite on the XRD diffraction pattern of bricks. SEM photos shows that quartz cover a small amount of mullite and sintered sample is the dense; TG-DTA thermal mechanism shows that the best sinterning temperature of the sample is 1150?°C.The study shows the necessity of ultra-fine fly ash processing. |
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Keywords: | Ultra-fine fly ash coal gangue sinterning mechanism research mullite |
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