Hydration Kinetics Model of Rice Husk Ash-Blended System

Abstract:

Rice husk ash (RHA) is a highly active pozzolanic material produced by rice husk combustion control, and it is widely used as a mineral admixture in the production of high performance concrete. The addition of rice husk ash has a complex effect on cement hydration. Current models do not explain all these complex effects. In this paper, the hydration kinetics model of RHA-cement cementitious system was established by considering the dilution effect, chemical effect and water absorption and release of porous structure of rice husk ash to composite cementitious system. Compared with the experimental results, it is proved that the model can simulate the cementitious system containing RHA-cement well. The hydration process of RHA-cement system can be used to predict the hydration degree of RHA-cement system changing with age.

• Periodical: Key Engineering Materials (Volume 842)
• Pages: 306-313
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.842.306
• Online since: May 2020
• Authors: Lang Wu, Ru Yu Yan, Jun Yao Cai, Wen Xia Yue*
• Keywords: Cementitious System, Hydration Kinetics, Rice Husk Ash

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