CARBONATAÇÃO DO CONCRETO: Análise comparativa da profundidade de carbonatação em concretos com agregados convencionais e reciclados

Abstract

This work analyzes the depth of carbonation in concrete with conventional aggregates and recycled aggregates. The concrete structures are attacked by several pathologies, among these pathologies the corrosion of the reinforcements is highlighted by the phenomenon of the carbonation of the concrete. This article discusses the process of carbonation of concrete by the accelerated method through the carbonation chamber, where tests were carried out in the laboratory in the University City of the Unis Group. The acceleration method through the carbonation chamber is a test that consists of obtaining samples in high concentrations of CO2 in a chamber. Such an approach is necessary to compare the carbonation depth between concretes with different types of aggregates. For this purpose, 18 specimens were made for the production of concrete, which were introduced for compression tests. 6 specimens and tensile by diametrical compression were 12 specimens. Of these specimens, 12 were placed in the carbonation chamber for direct exposure to CO2 and the 6 were placed in an H2O tank for hydration, after breaking the traction by diametrical compression, placed over the 12 bodies of the phenolphthalein solution is tested, after 4 hours with the aid of a caliper, the carbonation depth was measured for the study to be carried out and the data obtained to be analyzed.