A utilização de modelos multi-físicos na simulação do processo de carbonatação em estruturas de concreto e uma breve aplicação / An overview of multi-physics modeling to simulate the carbonation process in concrete and a simple application
DOI:
https://doi.org/10.34117/bjdv8n2-234Keywords:
Concreto, Modelos multifísicos, Carbonatação, Análise numérica .Abstract
A previsão da vida útil para uma estrutura de concreto pode ser considerada um aspecto essencial, uma vez que muitas estruturas apresentam problemas e o uso da estrutura pode ser inviável. A proteção passiva feita pela cobertura de concreto é fundamental, no entanto, ocorre um fenômeno natural no concreto em contato com a atmosfera, a carbonatação. A carbonatação leva a uma descalcificação progressiva da pasta de cimento hidratada. Esse fenômeno ocorre quando a concentração de cálcio diminui na água dos poros devido ao consumo de cálcio induzido pela reação de carbonatação. Este artigo apresenta a descrição de modelos numéricos utilizados por diferentes autores para simular o processo de carbonatação usando equações multi-físicas para concreto. São descritos modelos com diferentes abordagens. Considerando as características de cada modelo, uma discussão integrada é feita juntamente a uma análise paramétrica simples da evolução do fenômeno. Considerando o cenário atual no Brasil, este estudo pode ser considerado relevante, uma vez que várias estruturas apresentam problemas vitais associados ao processo de carbonatação.
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