Research on the Compatibility of Cement-Based Biomass Materials Modified by Early-Strength Agents

Hong Qi; Wei Qi; Guo Dong Sheng

doi:10.4028/www.scientific.net/AMM.775.287

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 775Research on the Compatibility of Cement-Based...

Research on the Compatibility of Cement-Based Biomass Materials Modified by Early-Strength Agents

Abstract:

Aim at the slow and complicated hydration process of straw-cement mixed system and the retarding coagulation of cement-based biomass material in C₃S reaction. To investigate the improving effect of early-strength agents on the hydration process of straw-cement mixed system by adding CaCl₂, FeCl₃ and Al₂(SO₄)₃ which could increase the release of hydration heat, accelerate the hydration of cement and weaken the retarding effect of dissolved substances from straw. By testing the variation of temperatures in hydration process to analyze the highest hydration temperature (T_max), the time of reaching the highest hydration temperature (t), the maximum temperature difference (△T) and the compatibility coefficients (C_A) of cement-based biomass materials with modified agents and with no modified agents, and evaluate the compatibility of straw-cement mixed system. Experimental results show that T_max, t and △T these indexes can intuitively reflect the changing characteristics of early hydration heat of cement-based biomass materials, while C_A could reflect the early hydration behavior comprehensively and objectively. Meanwhile, when the dosage of early-strength agents is between 3%~8%, the growth of C_A shows as follows: CaCl₂ is the best, and FeCl₃ is better than Al₂(SO₄)₃.

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Periodical:

Applied Mechanics and Materials (Volume 775)

Pages:

287-291

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.775.287

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Online since:

July 2015

Authors:

Hong Qi*, Wei Qi, Guo Dong Sheng

Keywords:

Cement-Based Biomass Materials, Compatibility, Early-Strength Agents

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