AN ASSESSMENT ON THE REMAINING SERVICE LIFE OF CONCRETE STRUCTURES UNDER CHLORIDDE CONTAINING ENVIRONMENTS

摘要

In recent years, many research works have been carried out to obtain a more controlled durability and long-term performance of concrete structures under chloride containing environments. In particular, the development of new procedures for probability-based durability analysis/design has proved to be very valuable for the enhancement of service life of concrete structures. Although there is still a lack of relevant data, this approach has been successfully applied to some new concrete structures. In this paper, the equation used for modeling of the chloride penetration was based on Fick's second law of diffusion in combination with a time dependent diffusion coefficient. The probability analysis of the durability performance was carried out by using a Monte Carlo Simulation. The new procedure for durability analysis was proved by using chloride penetration data from some concrete structures. The established procedure may be very useful in designing important concrete structures in chloride containing environments. Also, it may help to predict the remaining service life of concrete structures under a given probability of steel corrosioa.