MODELING KINETICS OF C-S-H DISSOLUTION DURING CARBONATION OF CEMENT PASTE.BEYOND THE SOLID SOLUTION APPROACH

摘要：

　　The thermodynamic of the dissociation reaction of C-S-H is studied by considering the Gibbs free energy of C-S-H as being dependent of the C/S and H/S ratios considered as two independent thermodynamic variables.Firstly equilibrium results in relationships involving the saturation degrees of dissolved pure substances and the C/S ratio of the C-S-H.From this basis the thermodynamic inequality shows that the time rate of change of calcium and silicon contents in C-S-H can be related to the departure from equilibrium in terms of these saturation degrees.Two simple kinetic laws are then proposed.We simulate the carbonation kinetics of a cement sample.

作者: Patrick Dangla Antoine Morandeau Mickael Thiery

作者单位: Laboratoire Navier,Université Paris-Est,ENPC-IFSTTAR-CNRS,France Department of Civil and Environmental Engineering,Princeton University,USA Département MAST,IFSTTAR,Université Paris-Est,France

会议类型: 国际会议

会议名称: 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)

会议地点: 北京

会议语种:英文

页码: 401-407

在线出版日期: 2014-10-12（万方平台首次上网日期，不代表论文的发表时间）