Concreto estrutural leve contendo argila expandida e adição mineral de metacaulim e resíduo de tijolos cerâmicos.

Abstract

Nowadays, we seek to apply the concept of sustainable development in all branches of industry. In construction this is no different. The search for minimization of the execution costs of a work is directly associated with the consumption of concrete, steel and the dimensions of the parts used. In addition, the use of waste generated in the construction industry itself has increasingly attracted the attention of researchers. Lightweight structural concrete with use of mineral addition emerges as an innovative and alternative material to conventional concrete. Based on this, the present work studied light structural concrete containing expanded clays of two distinct granulometries together with the use of metakaolin and residue of ceramic bricks, partially replacing the Portland cement. The materials were characterized for physical and mineralogical properties and if concrete mixtures were studied replacing the Portland cement with 10% mineral addition. The influence of the mineral additions on properties such as compressive strength, fresh specific mass, specific hardened mass, modulus of deformation, water absorption and voids index were analyzed. Cone trunk abatement limits and water / cement factor were set for all traits studied. It was verified that the addition of 10% of the metacaulim proved to be beneficial in the resistance gain and the maintenance of the void index and water absorption. However, the addition of ceramic brick residue did not show significant improvements in concrete properties.