Thermodynamics and Kinetics Study of Tricalcium Silicate (C3S) Under Steam Curing
ZHANG Jitao1,2, GENG Jian1,3, LI Dong2, ZHU Haoze1,4
1 Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China 2 Department of Civil Engineering, Shanghai University, Shanghai 200444, China 3 Ningbo Research Institute, Zhejiang University, Ningbo 315100, China 4 College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China
Abstract: The mineral phase of C3S was prepared by a conventional solid phase sintering method. The thermodynamics and kinetics of C3S under steam curing were studied based on Parrot-Killoh (PK) model and GEM-Selektor, and compared with experimental results. The results show that steam curing can significantly promote the hydration degree of C3S in the early stage, but it will obstacle the hydration in the later age, this phenomenon is more obvious for C3S that under higher constant temperature. At 90 days, the hydration degree of C3S are basically same for five curing conditions. The increase of constant temperature has little effect on the C/S of C-S-H gel, but it will reduce the H/S of C-S-H gel. GEM-Selektor is accurate in the simulation calculation of the effect of constant temperature on C/S, but the H/S has a larger error in both numerical value and trend with increasing of constant temperature.
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2021, Vol. 35 
