Effect of Added-Calcium Thermal Activated Coal Gangue on Cement Hydration

Abstract:

Through determining Ca(OH)₂ content and chemically combined water content, hydration degree of cement with added-calcium thermal activated coal gangue may be analyzed. Variation of mineral composition during hydration process of system was analyzed by X-ray diffraction(XRD) method. Simultaneously, specific strength index was applied to study pozzolanic effect of activated coal gangue. The results can show high contribution of added-calcium coal gangue calcined at 1050°C for pozzolanic properties and high hydration reaction degree in this kind of activared coal gangue cement system, with fewer Ca(OH)₂ content, more chemically combined water content and obviously reduced hydration product Ca(OH)₂ at each age.

• Periodical: Applied Mechanics and Materials (Volumes 71-78)
• Pages: 833-836
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.71-78.833
• Online since: July 2011
• Authors: Xu Yan Song, Jing Yun Han, Zhi Hai Gao
• Keywords: Added-Calcium Thermal Activated Coal Gangue, Ca(OH)₂ Content, Cement Hydration, Chemically Combined Water Content, Pozzolanic Effect, XRD Analysis

References

[1] X.Y. Song, D.X. Li and J.Y. Han. Non-Met Min, Vol. 32(2009), pp.38-41, in chinese.

[2] X.C. Pu, W.N. Yan, C Wang, etc. Coal Ash China, (2000), pp.6-9, in chinese.

[3] J.Y. Han, X.Y. Song and Z.H. Gao. Non-Met Min, Vol. 32(2009), pp.17-19, 25, in chinese.

[4] L.H. Yu and H Ou. J Harbin Inst Technol, Vol. 35(2003), pp.739-742, in chinese.

[5] Feng Q and Wang P M. J Mater Res, Vol. 20(2006), pp.191-196, in chinese.

[6] Maria S. Konsta-Gdoutos and Surendra P. Shah. Cem Concr Res, Vol. 33(2003), pp.1269-1276.

[7] M X Shi, Y J Xie and B J Liu. J Build Mater, Vol. 5(2002), pp.114-119, in chinese.