Comments About Tests Methods for Chloride’s Penetration in Cement-Based Materials
摘要
It has been important to comprehend the transport mechanisms of aggressive ions in concrete for an approach based on performance and durability indicators of reinforced concrete. Chloride ions can cause corrosion of reinforcing steel in concrete and as result of causing severe degradation of reinforced concrete structures. Besides that, chloride migration coefficient values have revealed as an interesting parameter and indicator of durability of concrete exposed to chloride-rich atmospheres such as marine environments. Thus, this paper shows a mini-review about some test methods for experimental determination of resistance to chloride penetration in cement-based materials. Some of them methods were listed, summarized and categorized as chloride diffusion coefficient or chloride migration coefficient and as in steady state, non-steady state or multi-regime state. In addition, the advantages and disadvantages of these test methods have been mentioned within the context of a general discussion of them. Finally, the chloride diffusion/migration coefficients have been used as input parameters in service life predictive models to evaluate and guarantee durability for concrete structures in marine environments.