Previsão da vida útil de concreto armado de alta resistência com adição de metacaulim e sílica ativa em ambientes marinhos

Abstract

In marine environments, the big problem related to concrete durability is a chloride ion attack. Service life prediction in this type of environment is still without consensus by technical and scientific researchers. This work presents advances by proposing a way to interpret data from chloride ions diffusion in high-strength concrete containing metakaolin and silica fume as admixtures. The results showed that metakaolin and silica fume increased service life in a marine environment by 240 per cent and 440 per cent, respectively. This evidenced the high efficiency of the metakaolin and silica fume admixtures as a way of producing more durable concretes for regions highly influenced by saltwater spray.