RESEARCH ON CEMENT HYDRATION PROCESS BASED ON AN IMPROVED MICROSTRUCTURE MODEL

Author(s): Xianyu Jin, Nanguo Jin, Yuwei, Wang, Ye Tian
Paper category: Proceedings
Book title: Proceedings of CONSEC13 Seventh International Conference on Concrete under Severe Conditions - Environment and Loading Volume I
Editor(s): Z.J. Li, W. Sun, C.W. Miao, K.Sakai, O.E. Gjørv, N.Banthia
ISBN: 978-2-35158-124-7
e-ISBN: 978-2-35158-134-6
Publisher: RILEM Publications SARL
Publication year: 2013
Pages: 220-233
Total Pages: 961
Language : English

Abstract: In order to accurately predict the hydration degree and analyze the time-dependent development of microstructure of cement paste during hydration process, based on Krstulović-Dabić hydration kinetics formulas, the concept of hydration unit was proposed to bridge the relationship between hydration degree and microstructure of cement. Taking water/cement ratio, chemical compositions of cement, free water in porosity, temperature, interfacial contact area between hydration products and free water, and diameter distribution of cement particles into consideration, an improved microstructure model of cement hydration was established. In this research, the thermo-gravimetric analysis (TGA) and non-contact electrical resistivity measurement were employed to study the development of hydration degree and specific contact area of cement paste. The experiment results agree well with the model prediction results which indicate that the model can accurately simulate the time-dependent development of cement hydration process.

Online publication : 2013
Publication type : full_text
Public price (Euros) : 0.00