Effect of Matrix Modification on Durability of Cementitious Composites in an Acid Rain Environment
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2014年第3期
论文作者：贺奎 YANG Hui LU Zhenbao JIA Fangfang WANG Erpo 董全霄
文章页码：498 - 503
摘 要：The durability of silane-modifi ed mortar, a cementitious composite, in acid rain environment was investigated given its extensive usage as a structural material. The results indicated that the addition of silane decreased the compressive strength of the cementitious composite. Wetting angle was increased by incorporating silane into the matrix. Decrease in both water absorption ability and coefficient of capillary suction confi rmed hydrophobicity as induced by silane addition. Results of mechanical testing, scanning electron microscopy and X-ray diffraction showed that the sulfuric acid resistance of mortar was enhanced by silane. Based on these results, it is revealed that silane addition inhibits the diffusion of water, and consequently, sulfate ion diffusion rate decreases, thereby resulting in reduction in the rate of corrosion of cementitious composites by sulfuric acid.
贺奎1,2，YANG Hui1，LU Zhenbao2，JIA Fangfang2，WANG Erpo2，董全霄2
1. Department of Materials Science and Engineering, Zhejiang University2. Beijing Engineering Research Center of Architectural Functional Macromolecular Materials, Beijing Building Construction Research Institute, Co., Ltd.
摘 要：The durability of silane-modifi ed mortar, a cementitious composite, in acid rain environment was investigated given its extensive usage as a structural material. The results indicated that the addition of silane decreased the compressive strength of the cementitious composite. Wetting angle was increased by incorporating silane into the matrix. Decrease in both water absorption ability and coefficient of capillary suction confi rmed hydrophobicity as induced by silane addition. Results of mechanical testing, scanning electron microscopy and X-ray diffraction showed that the sulfuric acid resistance of mortar was enhanced by silane. Based on these results, it is revealed that silane addition inhibits the diffusion of water, and consequently, sulfate ion diffusion rate decreases, thereby resulting in reduction in the rate of corrosion of cementitious composites by sulfuric acid.
关键词：
