Model analysis of the transportation of chloride into concrete under dry-wet cyclic conditions

The dry-wet cyclic experimental method is designed to imitate the reinforced concrete corrosion in the natural environment. The polynomial model of chloride ions transporting inside the concrete is discussed and its numerical calculation is analysed through the reasonable differencing scheme, and the stability of the differencing scheme is discussed accordingly. The chloride concentration distribution in concrete can be obtained respectively by the chemistry titration method and calculated using the above model by selecting the parameters according to the concrete material property and the stability of differencing scheme. The statistical characteristic analysis and the relativity of the calculated value and the tested value both verify the accuracy of the model.