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Hydration Kinetics of Municipal Solid Wastes Incineration (MSWI) Fly Ash-Cement

  • Lili Kan (阚黎黎)Email author
  • Li Zhang
  • Huisheng Shi
Cementitious Materials
  • 4 Downloads

Abstract

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.

Key words

municipal solid waste incineration (MSWI) fly ash hydration heat kinetics hydration degree 

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Copyright information

© Wuhan University of Technology and Springer-Verlag GmbH Germany, Part of Springer Nature 2019

Authors and Affiliations

  1. 1.School of Environment and ArchitectureUniversity of Shanghai for Science and TechnologyShanghaiChina
  2. 2.Key Laboratory of Advanced Civil Engineering Materials of Education MinistryTongji UniversityShanghaiChina

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