Brise de concreto com resíduo de borracha da indústria calçadista.

Abstract

The disregard for the climatic conditions of the environment left the new buildings hostage to artificial solutions for thermal improvement. In addition, the large consumption of natural inputs, as well as waste generation, has caused ecological disasters, alerting to a scenario of the need for sustainable awareness. Civil construction, even using primarily raw materials, has always shown potential in the application of waste, including rubber. The concrete, in its various uses, is also applied in brises, which is an element of solar protection inserted externally in facades, for thermal and luminous improvement of environments. This is an element of expressive mass, which has no governing regent in Brazil and which is treated, in design, as an integral part of the structure, even without having this responsibility. Thus, in an attempt to find a more sustainable and light material for the production of concrete brises, this work aims to develop brises-soleis concrete using rubber residue of the footwear industry to replace part of the small aggregate, through the process recycling. Initially, four dosage compositions were tested, replacing 5%, 10%, 20% and 30% of the small's aggregate (sand) with the ground rubber. These were compared to conventional dosing, from cylindrical specimens, referred to as reference concrete. Specific gravity, water absorption by capillarity, compressive strength and tensile strength tests were performed in addition to scanning electron microscopy (SEM) analysis. In the second step, after choosing the best characteristics (TB10%), brise prototypes were developed in real scale, to observe bending and evaluate deformation and cracking, as well as some small scale prototypes for pigmentation test. Since the element in question does not need high resistance, the results it was possible to show that it is possible, with residue replacement, to obtain a lighter part, with adequate strength to support its own weight, without allowing damage to the reinforcement. It was obtained element with characteristics suitable for the indicated use and that can still compose the buildings in a playful way. It is concluded that the contribution of the research is given in the sustainable context, from the development of a new product.