基于多相水化模型的水泥水化动力学研究

Cement hydration kinetics research based on multi-phase hydration model

基于Ulm和Coussy提出的多相水化动力学模型,在考虑水泥的化学组成、养护温度、水灰比、最终水化程度及水泥细度等因素情况下,从理论上建立了水化动力学方程,可用于预测水化速率随水化程度的变化。结果表明:水灰比会加速相边界反应,而对早期的结晶成核与晶体生长却没有明显影响;温度的升高能够加速水化进程,却不能改变最终水化程度。

Based on the multi-phase hydration dynamic model proposed by Ulm and Coussy,taking into account the factors such as chemical composition of cement、curing temperature、water-cement ratio、the final hydration degree and fineness of cement,a theoretical hydration kinetics equations was established in this paper.It can be used to predict the hydration rate increases with the change of hydration degree.The results showed that：water-cement ratio will accelerate the phase boundary reaction,while not influence the the early crystallization of nucleation and crystal growth;temperature can accelerate the hydration process,but it can not change the ultimate hydration degree.