SIMULATION OF THE DEVELOPMENT OF PH IN THE PORE SOLUTION OF SLAG CEMENT PASTE AT EARLY AGE
The prediction and control of the development of pH in the pore solutions of cement-based materials, particularly at early age, is important for both engineering practise and academic interests.This study aims to simulate the development of pH in the pore solutions of slag cement pastes at early age based on the 3D numerical cement hydration model HYMOSTRUC3D 1.HYMOSTRUC3D was used to simulate the hydration of slag cements.Taylors method 2 was used to predict the Na+ and the K+.The thermodynamic equilibriums of the CH and the gypsum in the slag cement pastes were used to predict the Ca2+, the SO42- and the OH-.The development of pH in the pore solutions of the slag cement pastes was simulated based on the OH-.The results of simulation indicate that the Na+ and the K+ in the pore solutions of slag cement pastes predicted by this study are in good agreement with the experimental results.However the accuracy of the simulation of Ca2+ and SO42- is relatively low.The simulated pH in the pore solutions of slag cement pastes is in good agreement with that of experiment before 10 hours and after 72 hours.
Peng Gao Guang Ye Jiangxiong Wei Qijun Yu
School of Materials Science and Engineering,South China University of Technology,Guangzhou,Peoples Microlab,Faculty of Civil Engineering and Geosciences,Delft University of Technology,Delft,The Nethe School of Materials Science and Engineering,South China University of Technology,Guangzhou,Peoples
国际会议
The Fourth RILEM International Symposium on Concrete Modelling (CONMOD 2014)(第四届RILEM混凝土材料建模国际会议)
北京
英文
273-280
2014-10-12（万方平台首次上网日期，不代表论文的发表时间）