Substituição parcial do cimento portland pelacinza do bagaço da cana-de-açucar com adição de silica ativa no concreto

Abstract

This work aims to evaluate the potential of CBA with the addition of active silica and its influence on concrete as a partial replacement of Portland cement. Sugarcane is produced on a large scale in Brazil, and one of its by-products is sugarcane bagasse, which can be used to generate energy through burning, due to its calorific value. In contrast, this process provides a residue called sugarcane bagasse ash, which is considered a major pollutant when improperly disposed of in the environment. This ash has properties of pozzolanic addition, being able to partially substitute contents of Portland cement, causing improvement in the physical and mechanical properties of the concrete. This work develops a study of the sugarcane produced in the municipality of Pedro Afonso -TO, and proposes substitution in the contents of 5%, 10% and 15% of Portland cement by sugarcane bagasse ash, analyzing the physical properties of the small aggregates, large aggregates and CBC as well as the physical properties of the concrete in the fresh and hardened state. The results obtained show that the higher the percentage of substitution of Portland cement for sugarcane bagasse ash, the more the resistance tends to fall in comparison to the reference trait, and that the trait in the 5% substitution content obtained more results. close to the reference line, making the substitution more viable.