Journal
CEMENT AND CONCRETE RESEARCH
Volume 136, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.cemconres.2020.106174
Keywords
Tricalcium silicate; Thermodynamic; Kinetic model; Heterogeneous nucleation
Funding
- National Key Research and Development Program of China [2017YFB0310101]
- National Natural Science Foundation of China [51878381]
- China Postdoctoral Science Foundation [2019M660037]
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In this study, thermodynamic and kinetic models are established to describe the early hydration of tricalcium silicate, by means of considering of dissolution and precipitation mechanisms separately. Since both the dissolution of C3S and the precipitation of hydration products are affected by the ions concentrations, these two procedures are coupled via the aqueous properties of the solution. In this model, a critical length of outer-CSH is introduced to modify the boundary nucleation and growth. The influence of hydration temperature and particle size distribution on the early hydration kinetics of C3S are evaluated with the newly developed model. A good simulation is obtained.
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