TEST ON PROTECTION FUNCTION OF EXTERNALLY BONDING CFRP FOR COASTAL CONCRETE STRUCTURE SUBJECTED TO CHLORIDE ATTACK
The function that carbon fiber reinforced polymer (CFRP) bonded externally to prevent effectively chloride ions from diffusing into concrete is confirmed by 2 groups of laboratory accelerated penetration tests. The effectiveness of CFRP material to prevent Cl- is confirmed by tests of 1st group; and similar conclusion also is drawn in 2nd groups of test for CFRP externally bonded on concrete specimens. Thus, for coastal concrete structures, there is not only strengthening function of bonding CFRP, but also that of preventing chloride ion from penetrating into concrete, and consequently to prolong the initiation period of rebars corrosion. It is also confirmed by test that there is similar function of CFRP and coating on the surface of concrete to shield concrete against chloride ions. Therefore, it is suggested that CFRP bonded externally and coating or other surface protection measures are applied jointly to form an integrated surface prevention system when CFRP is applied in strengthening coastal concrete structures. Considering the limitation involving with time of the effective shielding function of CFRP, an equation used for residual lifetime prediction of concrete structures bonded externally with CFRP is derived from Ficks diffusion law. Overall, the conclusion may be used for recommendation when CFRP is applied to strengthen coastal concrete structures.
Carbon Fiber Reinforced Polymer (CFRP) Chloride Ions protection function Corrosion Protection System Residual Durability Life Prediction
Feng-shan CHEN Chao GAO Guo-fan ZHAO Fang YU
State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology, China Institute of Civil Engineering Dalian Fisheries University, China
国际会议
The 3rd International Conference on The Concrete Future(第三届混凝土未来国际会议)
烟台
英文
115-122
2008-10-17（万方平台首次上网日期，不代表论文的发表时间）