Influência da carbonatação no índice esclerométrico

• Autor(a) principal: Ribeiro, Valeska Maria Brasileiro
• Data de Publicação: 2019
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Federal do Ceará (UFC)
• Texto Completo: http://www.repositorio.ufc.br/handle/riufc/52203
• topic: Ensaio não destrutivo; Esclerometria.; Carbonatação

The sclerometer test method is one of the oldest non-destructive tests, still it is very used due to the low cost of execution, the simplicity of equipment handling and the speed in estimating the surface hardness of concrete. Among the factors that influence the sclerometer, it is worth highlighting the carbonation that causes an overestimation of the sclerometric index. This study aims to verify how the carbonation front of the structural element interferes with the values of the sclerometric index.The equipment used for the sclerometer test allows adding correction coefficient of the sclerometric index considering the carbonation’s degree and there is an indication of ABNT NBR 7584: 2012 to apply the corrective factor for these cases, however the Standard does not define parameters of how this coefficient can be quantified. Therefore, it is necessary to obtain correction factors of the sclerometric index in relation to carbonation for the reality of Ceará state. Initially, the sclerometer test was performed, then the accelerated carbonation in the concrete element, then, using phenolphthalein, the carbonated front was verified. After carbonation, sclerometry was performed again. After that, the axial compression strength test was performed. Finally, with the obtained results, il was determined the correction factors and the correlation curve between the correction factor considering the carbonation element and carbonation front.