Determination Of Chloride Concentration And Effect Of RAM In Concrete

As an important content of concrete durability, chloride-induced corrosion is valuable for the research of reinforcement corrosion and service life predictions in theory. The feasibility of Fick's second law, the application of chloride binding isotherms and the effect of RAM have been discussed in this paper.Experimental investigation and theory analysis are the main methods in this paper. The conclusion is believable because of a large number of test data. Excel and Origin have been used to analyse the linear or non-linear relationship of these data, calculate the parameters and the related coefficients between these data and the theoretical models. The results show that, the Fick's second law based on corrosion environment should be presented; the linear isotherm of chloride binding is appropriate in concrete structures; the amounts of bound chloride in tide range area and air environment is 0.11~0.37 times of free chloride; the diffusion coefficient is 1/3 to the concrete without RAM and the effect is the best when the RAM ratio is about 15%.The research of chloride binding isotherm and the effect of RAM in this paper is valuable for the improvement of Fick's second law, and new contents have been established for the definition of pouring.