ویژگی های جذب آب مواد بر پایه سیمان
Abstract
1. Introduction
2. Theoretical process of absorption model
3. Materials and methods
4. Results and discussion
5. Conclusions
Declaration of Competing Interest
References
Abstract
With the development of urban infrastructure, subway and other underground projects are gradually being constructed in various cities. The influence of water absorption on surface of cement-based materials has therefore become more and more important. A mathematical model and the relative experiment of water absorption in cement mortar were investigated. The results showed that the change of radius of pore was decreased and absorption mass fraction was increased with the increased of absorption time. The possibility and direction of reaction during this process were studied, and the result showed that hydrolysis was not merely occurred in this process.
Introduction
Cement-based material is one of the most useful materials in civil engineering. Based on the characteristic of porous of cement-based material, its service performance change accordingly. When they are built in the underground environment, water tends to penetrate cement-based materials as capillary force. Because of existence of other ions in groundwater, it penetrated into the materials and lead to be affected of durability of materials. Therefore, the research of absorption of underground water on surface of cement-based materials is important. The recent research of absorption behavior was mainly focused on the fitting equation. the fitting method was adopted in the research of Martys et al.