Análise da durabilidade do concreto de alto desempenho com adição de cinza de casca de arroz e borracha de pneu

• Autor(a) principal: Vasconcelos, Antonio Rogério Brizante De [UNESP]
• Data de Publicação: 2010
• Outros Autores: Akasaki, Jorge Luís [UNESP]
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1590/S1678-86212010000100009; http://hdl.handle.net/11449/110284
• topic: Concreto de alto desempenho; Durabilidade; Borracha de pneu; Cinza da casca de arroz; High-Performance concrete; Durability; Tire rubber; Rice husk ash

Since the Seventies, there has been a growing degradation of concrete structures in Brazil. For that reason, much research has been made on the durability of those structures, aiming at contributing towards quality improvement and reduction of maintenance and repair costs. This study evaluates the behavior of the durability of high-performance concrete with additions, replacing part of the cement and aggregates with rice husk ash and tire rubber, respectively. Durability tests were carried out in which concrete was subjected to several degradation processes, such as the action of water, temperature, salts and acid solution. The results indicated that the addition of active silica or rice husk ash, both with tire rubber did not worsen the durability of concrete. In fact, rubber proved to be very effective in preventing the action of chemical agents, high temperatures and the penetration of water. Rice husk ash, despite the larger diameter of particles, had similar results to that of the active silica.