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Thermal Reaction Kinetics of Fly Ash Cement Paste at the Age of 28 Days

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Abstract:

The thermal reaction kinetics of fly ash cement pastes were studied by Differential Scanning Calorimetry (DSC) and Thermal Gravity Analysis-Differential Thermal Gravity (TG-DTG) method, the kinetics parameters such as apparent activation energy was calculated by the Kissinger method, and the physical parameters were obtained. The result show that the fly ash cement pastes performance three endothermic reaction stages at different heating rates, peak temperatures of each stage at the range of 91.85~121.08°C, 453.93~496.48°C, and 680.21~751.62°C. TG-DTG show there were three thermal decomposition stages, thermal dehydration reaction apparent activation energy of fly ash cement pastes in each stage were 47.23kJ/mol, 128.84kJ/mol, and 134.07kJ/mol.

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Periodical:

Applied Mechanics and Materials (Volumes 668-669)

Pages:

91-94

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.668-669.91

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Online since:

October 2014

Authors:

Xiao Fang He, Chang Wen Miao, Yong Hao Wu, Xin Xin Cao, Dan Liu

Keywords:

Activation Energy, Fly Ash Cement Pastes, Kissinger, Thermal Reaction Kinetics

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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References

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