Distribution of Chloride Concentration in Modeled Recycled Concrete Simulated by Finite Element Method
Proposed is a simple analytic model that can simulate the chloride diffusion distribution in a modeled recycled aggregates concrete (RAC). In this paper, on the one hand, the RAC is divided into three phases such as normal aggregates, new mortar and old attached mortar; on the other hand, a single aggregates RAC model was built, finite element method (FEM) is used to simulate chloride diffusion process based on the parameters of diffusivities summarized or derived from other literatures. It is found that the chloride concentration distribution in the RAC shows a band-like profile instead of a smooth curve for a homogeneous medium by ten years diffusion, with the bandwidth undulating and narrowing as the diffusion depth increases. The concentration of chloride distribution can be indicated by the different colors and, therefore, the proposed model allows more accurate realization of diffusion process.
J. W. Ying and H. G. Chen, "Distribution of Chloride Concentration in Modeled Recycled Concrete Simulated by Finite Element Method", Advanced Materials Research, Vols. 261-263, pp. 147-150, 2011