ANÁLISE DA FRENTE DE CARBONATAÇÃO EM OBRAS DE INFRAESTRUTURA VIÁRIA: ESTUDO DE CASO DE UMA PASSARELA
Resumo
Apontada como uma das principais causas relacionadas à degradação de estruturas de concreto, a corrosão das armaduras tem motivado diversas pesquisas. Entretanto, um contingente escasso de trabalhos remete às estruturas reais, principalmente no que tange o estado de degradação de obras de infraestrutura viária como, por exemplo, passarelas de pedestres sobre rodovias. Neste sentido, o presente trabalho apresenta uma análise da frente de carbonatação em uma passarela de pedestres que permaneceu em serviço por mais de vinte anos, localizada na BR 116, Rodovia Presidente Dutra, no trecho que atravessa a cidade de São José dos Campos, SP. Os resultados obtidos demonstraram que a adoção de camadas de pintura e a dispersão do CO2 na atmosfera, ocasionada pelo movimento dos veículos, minimizou a penetração de dióxido de carbono através da rede de poros do concreto, contribuindo assim, para a durabilidade e vida útil da obra em questão.Referências
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