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Study on the Hydration Kinetics of Portland Cement

Wang, Wei / Yao, Wu / Wei, Yong-Qi

A kinetic model originally developed by Tomosawa is analyzed for the hydration of Portland cement. The complicated kinetic equation of Tomosawa model is transformed into three simple equations of simplified model which represent mass transfer, phase-boundary reaction and diffusion process at different stage, respectively. Based on the isothermal calorimetry and the simplified model, the relationship between the degree of reaction and reaction rate is discussed. The derived result could reflect the development of degree of reaction and reaction rate during the cement hydration. The calculation results of simplified model are compared well with the experimental results. Studying the connection among the three processes is helpful to understanding the complicated hydration mechanism of Portland cement.

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Study on the Hydration Kinetics of Portland Cement

Wang, Wei / Yao, Wu / Wei, Yong-Qi

A kinetic model originally developed by Tomosawa is analyzed for the hydration of Portland cement. The complicated kinetic equation of Tomosawa model is transformed into three simple equations of simplified model which represent mass transfer, phase-boundary reaction and diffusion process at different stage, respectively. Based on the isothermal calorimetry and the simplified model, the relationship between the degree of reaction and reaction rate is discussed. The derived result could reflect the development of degree of reaction and reaction rate during the cement hydration. The calculation results of simplified model are compared well with the experimental results. Studying the connection among the three processes is helpful to understanding the complicated hydration mechanism of Portland cement.

Study on the Hydration Kinetics of Portland Cement

Wang, Wei / Yao, Wu / Wei, Yong-Qi

A kinetic model originally developed by Tomosawa is analyzed for the hydration of Portland cement. The complicated kinetic equation of Tomosawa model is transformed into three simple equations of simplified model which represent mass transfer, phase-boundary reaction and diffusion process at different stage, respectively. Based on the isothermal calorimetry and the simplified model, the relationship between the degree of reaction and reaction rate is discussed. The derived result could reflect the development of degree of reaction and reaction rate during the cement hydration. The calculation results of simplified model are compared well with the experimental results. Studying the connection among the three processes is helpful to understanding the complicated hydration mechanism of Portland cement.

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Title:

Study on the Hydration Kinetics of Portland Cement

Contributors:

Wang, Wei (author) / Yao, Wu (author) / Wei, Yong-Qi (author)

Published in:

Testing and Evaluation of Advanced Building Materials, TEBM, National Academic Symposium on Testing and Evaluation of Building Materials, 1 ; 30-34

Key Engineering Materials ; 539

Publication date:

2013

Size:

5 Seiten

ISSN:

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.539.30

Type of media:

Conference paper

Type of material:

Print

Language:

English

Keywords:

Modell , Kinetik , Hydratation , kinetische Gleichung , Massentransfer , Diffusion , Kalorimetrie , Portlandzement , kinetisches Modell , Reaktionsgeschwindigkeit

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