Abstract
Concrete structures in the natural circumstances are going to detoriorate gradually, affected by carbonation (neutralization). The possibility of corrosion of reinforcement steel is considered to be significant when carbonation reaches its cover thickness. Also, the carbonation velocity of concrete is much affected by the natural circumstances. In this paper, to estimate the optimal cover thickness which contains the lifecycle term, the concept on reliability based total cost munimum technique is used. Furthermore, to evaluate the ambiguity of influences of natural circumstances that affects the carbonation velocity, fuzzy algebla is adopted.
