Literature review on Coefficient of Chloride diffusion in Concrete and Propose the novel model

Corrosion of reinforcement in concrete structure is the main factor of determination in the world. Therefore evaluation of concrete on durability base is essential for construction in coast of Persian Gulf and Oman sea. The most important test method is measurement or prediction of diffusion coefficient of concrete. There are different direct and indirect methods for determining of diffusion coefficient. The methods include, chloride profile and Fick law, rapid chloride permeability test, conductivity, and resistivity. Formation factor is considered as an important indicator of concrete performance against chloride diffusion. Because this indicator contains both the resistivity of the concrete and resistivity of the pore solution. In otherwords, the formation factor indicates the amount of porosity in the concrete and the type and amount of ions in the pores. The porosity and ions determine the intensity of chloride diffusion in concrete. The target of researchers is to achieve accurate diffusion methods or proposing simple models, in last 30 years. In this paper beside literature review, a novel and simple model for prediction of diffusion is presented.