Experimental Research on Chloride-Induced Service Life of Sturctures under Loading Capacity Criterion

Abstract

The whole service life of reinforcement concrete structure under chloride environment was devided into two stages according to mechanism of degradation. Using diffusion test, content of chloride ion was tested to decide diffusion coefficient for different age and damped exponential of diffusion coefficient. Then, through using effective diffusion coeffient into solution of the Fick’s Second Law, service life of the first stage was predicted. For corrosion propogation phase, loading test was carried out to construct relationship between loading capacity of corroded test model and accelerated corrosion time. When using this relationship to actual structure, we calculated the service life of the second stage. These methods and results can be considered as reference to eveluate service life of structure under the samilar environment.