滨海混凝土锈蚀表征与抑制研究

Abstract: With the development of marine resources in our country, the investment in major coastal infrastructure has been further increased, and the structural durability has become a critical issue. Under the coastal environment, corrosion of steel caused by chloride ingress is the most important factor affecting the durability of coastal concrete structures. In this project, aiming at the key problems of chloride ingress in concrete in coastal area, the mechanism of chloride-induced corrosion of reinforced concrete and the key parameters of corrosion inhibition are deeply investigated. A new type of chemical triggered micro-capsule is designed to controls the release of rust-resistant materials by chloride ions, which realizes the intelligent inhibition of corrosion of concrete and build up a self-immune system to adapt and respond to the costal environment. The research of this project can realize the self-immunity of concrete against chloride ingress in coastal / marine environment, promote the development of sustainable and resilience civil structure, and achieve the goal of improving the durability and safety of coastal concrete .Abstract: With the development of marine resources in our country, the investment in major coastal infrastructure has been further increased, and the structural durability has become a critical issue. Under the coastal environment, corrosion of steel caused by chloride ingress is the most important factor affecting the durability of coastal concrete structures. In this project, aiming at the key problems of chloride ingress in concrete in coastal area, the mechanism of chloride-induced corrosion of reinforced concrete and the key parameters of corrosion inhibition are deeply investigated. A new type of chemical triggered micro-capsule is designed to controls the release of rust-resistant materials by chloride ions, which realizes the intelligent inhibition of corrosion of concrete and build up a self-immune system to adapt and respond to the costal environment. The research of this project can realize the self-immunity of concrete against chloride ingress in coastal / marine environment, promote the development of sustainable and resilience civil structure, and achieve the goal of improving the durability and safety of coastal concrete .

随着我国对海洋资源开发步伐的加快，滨海重大基础设施投资进一步加大，结构耐久性变得尤为重要。滨海环境下，氯离子侵蚀引起的钢筋锈蚀是影响滨海混凝土结构耐久性的最主要因素。本项目针对滨海混凝土中氯离子侵蚀这一关键问题，深入研究氯离子侵蚀诱发的钢筋混凝土锈蚀机理及钢筋锈蚀抑制的关键参数，设计新型化学触发微胶囊，在氯离子侵蚀条件下控释阻锈材料，实现混凝土中锈蚀智能抑制，构筑能够适应和响应环境的滨海混凝土自免疫系统。该项目研究的开展，可实现混凝土在滨海/海洋环境下针对于氯离子侵蚀的自免疫功能，推动土木结构朝着自适应、可恢复的目标发展，达到提高滨海混凝土耐久性和安全性的目标。

随着我国对海洋资源开发步伐的加快，滨海重大基础设施投资进一步加大，结构耐久性变得尤为重要。滨海环境下，氯离子侵蚀引起的钢筋锈蚀是影响滨海混凝土结构耐久性的最主要因素。本项目针对滨海混凝土中氯离子侵蚀这一关键问题，深入研究氯离子侵蚀诱发的钢筋混凝土锈蚀机理针对性地设计新型化学触发微胶囊，在氯离子侵蚀条件下控释阻锈材料，实现混凝土中锈蚀智能抑制，构筑能够适应和响应环境的滨海混凝土自免疫系统。项目的成功实施实现了混凝土在滨海/海洋环境下针对于氯离子侵蚀的自免疫功能，推动土木结构朝着自适应、可恢复的目标发展，达到提高滨海混凝土耐久性和安全性的目标，并取得如下成果：发表学术论文12篇，其中SCI收录中科院分区二区以上论文10篇，获批发明专利2项（见本结题报告的项目成果列表）；依托本项目项目负责人获批国家自然科学基金优秀青年基金项目1项，联合培养博士研究生3名，硕士研究生5人，完成项目预期指标。