Hydration Kinetics of Municipal Solid Wastes Incineration（MSWI） Fly Ash-Cement
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2019年第3期
论文作者：阚黎黎 ZHANG Li SHI Huisheng
文章页码：596 - 603
摘 要：Hydration heat behavior and kinetics of blended cement containing up to 20% MSWI fly ash were investigated based on its hydration heat evolution rate measured by isothermal calorimeter. Kinetics parameters, N and K, and hydration degree, Ca（OH）2 content, were also calculated and analyzed. According to the experimental results, the induction period was elongated, the second heat evolution peak was in advance, and the third hydration heat peak could be detected due to MSWI fly ash pozzolanic reaction. The hydration reaction rate was controlled by nucleation kinetics in the acceleration period and then by diffusion in the decay period, but in the deceleration period, the hydration experienced a dual controlling reaction of autocatalytic chemical reaction and diffusion. The hydration rate of blended cement was faster. Ca（OH）2 content increased before 14 days.
阚黎黎1，ZHANG Li1，SHI Huisheng2
1. School of Environment and Architecture,University of Shanghai for Science and Technology2. Key Laboratory of Advanced Civil Engineering Materials of Education Ministry,Tongji University
摘 要：Hydration heat behavior and kinetics of blended cement containing up to 20% MSWI fly ash were investigated based on its hydration heat evolution rate measured by isothermal calorimeter. Kinetics parameters, N and K, and hydration degree, Ca（OH）2 content, were also calculated and analyzed. According to the experimental results, the induction period was elongated, the second heat evolution peak was in advance, and the third hydration heat peak could be detected due to MSWI fly ash pozzolanic reaction. The hydration reaction rate was controlled by nucleation kinetics in the acceleration period and then by diffusion in the decay period, but in the deceleration period, the hydration experienced a dual controlling reaction of autocatalytic chemical reaction and diffusion. The hydration rate of blended cement was faster. Ca（OH）2 content increased before 14 days.
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