Thermally and Chemically Added-Calcium Composite Activation of Coal Gangue and its Application in Cement

• DOI: 10.4028/www.scientific.net/amr.306-307.1016
• Publication Date: 2011-08-16T11:34:32Z
• Authors: Xu Yan Song; Jing Yun Han; Zhi Hai Gao
• Keywords: Gangue; Cementitious; Calcium silicate

Activation of coal gangue from Yixing was done by the method addition calcium during calcination. Structural characteristic and cementitious properties activated samples were analyzed. And then hydration degree cement studied. The results show that: thermally chemically added-calcium composite activation can improve activity gangue. At 1050°C, more effective silicate minerals may be in samples, with which system have a higher hydration. infra-red(IR) spectra shows that large number new mineral peaks occur sample, extending age gradually decreases until it disappears.