Application of silane to improve durability of concretes with different age and moisture content

作者：Gao, Xiaojian^*; Deng, Hongwei; Yang, Yingzi

来源：Optoelectronics and Advanced Materials-Rapid Communications, 2012, 6(7-8): 750-754.

• Concrete
• Freeze-thaw resistance
• Silane impregnation
• Age
• Moisture content

This paper presents the improvement effects of silane impregnation treatment on durability of concretes with different strength grades (C30 and C50) and air content. The influence of age and initial moisture content of concrete were considered and the water adsorption and freeze-thaw resistance of concretes were measured. The age of concrete was simulated by exposing specimens to different cycles of freeze-thaw before silane treatment, and three different drying processes were selected to prepare different moisture contents in specimens. The results show that both water adsorption and freeze-thaw resistance of concretes are significantly improved by the silane impregnation treatment. The lower initial moisture content leads to the more improvement of freeze-thaw resistance of silane treated concretes. Therefore, the freeze-thaw resistance of both new and old concretes can be improved by the silane treatment, and the earlier treatment leads to the better improvement of concrete durability.

• 出版日期2012-8
• 单位哈尔滨工业大学