Sustentabilidade e análise acústica: produção de blocos de concreto com utilização de resíduos da construção civil

Abstract

Based on the growing generation of construction and demolition waste (RCD) in the world, and even in the Brazilian civil construction sector, the need to search for ways to use this input was born, and one of the ways to reduce these Environmental liabilities, is using it as aggregates in the manufacture of concrete blocks. The main objective of this research is to develop concrete blocks for sealing from construction and demolition residues, analyze their properties according to the characterization of the materials employed, and then determine their isolation levels Sound with different noise frequencies. This work not only developed and analyzed the best possible compositions for making concrete blocks, but also evaluated the requirements of noise insulation, describing the acoustic performance of concrete blocks made with RCD. For this purpose, RCD materials were collected, where subsequently it was used to produce the first specimens of the concrete blocks in the vibro baler. After analyzing the results, it is noteworthy that the use of RCD in the construction of sealing blocks is technically feasible, considering that it met the minimum requirements for façades for I and II noise zones. Thus, it is understood that the proposed objective was achieved since the results were compared between the blocks and reached the service of a good portion of the requirements imposed by national and international norms. About the parameters of mechanical strength, the RCD blocks complied with the recommendations of the norm ABNT NBR 6136 (ABNT, 2016). It is concluded that the use of RCD in the construction of sealing blocks is permissible and that it can be an efficient way to reuse this type of residue thus reducing the levels of pollution of the environment caused by inadequate disposal. It is noteworthy that even the block being porous and possessing a smaller specific mass it still has satisfactory levels of performance in noise isolation, especially if the use of this is accompanied by wall coverings such as Chapisco, and plaster which will make it even more efficient.