Investigação dos parâmetros normatizados para elementos de concreto enterrados frente a durabilidade requerida

• Autor(a) principal: Rosa, Daniel Campos
• Data de Publicação: 2020
• Outros Autores: Sabino, Leonam Ferreira
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Universitário da Ânima (RUNA)
• Texto Completo: https://repositorio.animaeducacao.com.br/handle/ANIMA/4411
• topic: Durabilidade; Vida útil; Concreto enterrado

Durability started to gain value as the structures constituted of reinforced concrete started to show problems related to the degradation of its constituent materials, and it became necessary to look for the causes of these problems, which are related to the aggressiveness of the environment where the concrete structure is inserted. Thus, this research aimed to investigate the standardized parameters for buried concrete elements in view of the required durability and lifespan. For this, the investigation was structured in two steps, the first step was constituted in the making of buried concrete traces, based on the NBR 6122 standard (ABNT, 2019), for helix continuous cutting pile concrete, each containing different additives, such as microsilica, metakaolin and crystallizing additive. In the second step, an accelerated chloride penetration test and acid attack by immersion were carried out, where a life expectancy method was used to estimate the durability against the required parameters, and to compare the performance of each trace for an environment with severe aggressiveness. With the results of step 2, it was possible to conclude that the trace containing microsilica obtained the best performance, and that some traces didn’t reach the required parameters, showing that they still need better specifications regarding parameters of environmental aggressiveness and tests for the Brazilian standards, to guarantee durability and the required lifespan for buried concrete.