跨海桥梁混凝土结构的腐蚀机理与防腐措施

Bridges over sea are exposed structures that are continuously subjected to attack from the marine environment, the structure concrete is easy to infiltrate and accumulate that the chloride ions of its surrounding will cause the steels to be corroded in the surface of the inside steel bars.The corrosion process will be very complicated and it will greatly influence the life-span of the bridge structure. In order to lessen or avoid the disadvantage caused by the corrosion which will have an execrable effect on the mechanics performance and durability of concrete structure, some feasible measure must be taken. It is reviewed on the useful anti-corrosion protection methods on the basis of mechanisms analysis of reinforced concrete corrosion in this paper.Meanwhile,their applicable characteristic and necessary requirement is also mentioned,which including improving structure and material behavior, enhancing steel–protection concrete dimension,enlarging diameters of the reinforcing steel bars by pre-considering their corrosion ,and promoting construction technique,etc.