海洋环境下混凝土的微生物腐蚀行为、作用机制及其防治技术基础研究

当前国内外对混凝土的微生物腐蚀研究主要侧重于污水环境，且主要集中于混凝土性能劣化影响方面，缺乏对微生物腐蚀的前提，即微生物在混凝土表面的附着以及生物膜的形成和腐蚀行为研究，而对含有相同代表性微生物的海洋环境下的混凝土微生物腐蚀则更是缺乏系统研究。针对上述问题，本项目拟首先对海洋环境中不同代表性微生物的生理生化特性以及上述微生物附着在混凝土表面经过不同时间后形成的生物膜特征进行研究，然后对形成生物膜后的混凝土电化学腐蚀行为、腐蚀特征以及作用机制进行研究，同时通过对混凝土的性能随腐蚀进行发生变化的过程进行分析，探明其性能劣化时变规律，最后通过对添加抗菌剂前后混凝土耐微生物腐蚀性能的对比研究，最终提出混凝土的微生物腐蚀防治方法。通过该项目的实施，将探明海洋微生物对混凝土的电化学腐蚀行为和作用机制，获得微生物腐蚀防治方法，为认识海洋环境下的混凝土微生物腐蚀现象以及加强腐蚀防治提供理论和技术支撑。

The present studies on the microbial corrosion of concrete mainly focus on that happening in sewage environment and the aspects of concrete performance degradation, lacking research on the premise of microbial corrosion, that is, the adhesion of microorganisms on concrete surfaces and the formation and corrosion behavior of biofilms. Besides, there have been few systematic studies on the microbial corrosion of concrete in marine environment containing the same representative microorganisms. To address the above problems, this project intends to firstly study the physiological and biochemical characteristics of different representative microorganisms in marine environment and the characteristics of biofilms which form upon the attachment of microorganisms on concrete surfaces after different periods of time. Secondly, the electrochemical corrosion behavior, and the properties and mechanism of the corrosion will be investigated. In the meantime, the law of dynamic change of concrete performance degradation will be uncovered by analyzing the process of concrete property change with corrosion. Finally, a concrete microbial corrosion control method will be proposed by a comparison study of the corrosion resistance of concrete before and after adding antimicrobial agent. By implementing this project, the electrochemical corrosion behavior and the mechanism of microbial corrosion of concrete in marine environment will be explored, and a microbial corrosion prevention and control method will be obtained. This will provide theoretical and technical support for understanding the microbial corrosion of concrete in marine environment and its prevention and control.