Determinação da profundidade de penetração de cloretos por aspersão de nitrato de prata em estrutura de concreto - estudo de caso

Abstract

Of the pathologies that attack the steel reinforcement in structures of reinforced concrete generating corrosion, we have that the one caused by the penetration of free chlorides in the concrete is considered one of the most severe. The main objective of this work is to evaluate the depth of the penetration of chlorides in a reinforced concrete structure located in a coastal region, where the propensity for this type of chloride attack is high. The method used was the colorimetric method, by spraying silver nitrate on the collected material of the studied structure, so that the analysis would bring an indicative for the appearance of recurrent fissures in the structure. It was observed in the experimental results that the colorimetric method used is excellent for preliminary determination of causes of pathologies, since it is a qualitative method of easy application, low cost and that has fast preliminary results, so that technicians and professionals of the field can diagnose alternatives of treatment or indicate the pathology engineer to perform other laboratory tests, now towards the correct direction.