混凝土结构劣化机理及耐久性设计研究

Researches on concrete structure deterioration priciples & durability design

我国是使用混凝土的大国 ,混凝土结构耐久性问题十分突出 ,是一个迫切需要解决的问题。论文从材料层次对混凝土结构的劣化机理就有关研究成果进行了综述 ,内容包括冻融循环、混凝土碳化、化学侵蚀、碱 -集料反应、钢筋锈蚀、应力腐蚀等方面。提出了混凝土耐久性设计的概念和原则 ,认为应从混凝土结构的材料、技术和构造措施。

China is a country consuming a great many concrete.Concrete structure deterioration is a serious problem which needs to be solved urgently.This paper makes a comprehensive review on researchs of deterioration mechanism of concrete structure from the aspect of materials.Cycle of frost and melting,carbonation of concrete,erosion of chemicals,alkali-aggregate reaction of concrete,reinforcement corrosion and stress of corrosion are included in this parer. It proposes the concept and principle of concrete durability design,thinking that the design of concrete structure durability should be from the following four aspects:the design of concrete materials,the measures of techniques and mechanism,regular detection and,protection and maintenance.