Comparativo entre Efeito da Carbonatação em Corpos-de-Prova de Concreto Expostos na Cidade de Pelotas/RS e o Uso de Modelos Matemáticos

• Autor(a) principal: Ferreira, Carina Farias
• Data de Publicação: 2018
• Outros Autores: Paliga, Charlei Marcelo, Torres, Ariela da Silva
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: P@ranoá
• Texto Completo: https://periodicos.unb.br/index.php/paranoa/article/view/24045
• topic: Conservação; Estruturas de concreto; Carbonatação; Ensaio natural; Modelos de previsão; Conservation; Concrete structures; Carbonation; Natural test; Prediction models

The carbonation being a major cause of compromising the performance of structures concrete over time, and have been studied by different methods. This research had as objective to make a comparative analysis between the prediction made by mathematical models existing in the literature with the carbonation depth found in concrete elements in the city of Pelotas / RS. For that, concrete specimens (10x20cm) were exposed in different districts of the city in order to verify if there is a difference in the depth of CO2 penetration during the exposure period. The specimens were exposed for a total period of 16 months, and samples were taken every 4 months for the application of phenolphthalein and determination of the carbonation depth. Then, for comparison and analysis of results, the models of Smolczyk, Vesikari, Morinaga, Helene and Possan were applied. As a result, significant values were found for the CO2 penetration, and through the application of the prediction models, it was possible to observe that the Helene model, despite the differences between the values obtained with its application and the data of the natural test, represented satisfactorily the penetration of CO2 over time to the city of Pelotas / RS, quite possibly due to the characteristics of the concrete used.