Análise do uso da cinza do bagaço de cana-de-açúcar na produção de concreto permeável para pavimentação

Abstract

The 2022 demographic census revealed that Brazil has 208 million inhabitants, with about 85% living in urban areas. Population growth leads to an increase in disordered urbanization, resulting in an increase in impermeable areas, which, along with other factors, overloads the conventional drainage system. In search of alternative solutions, permeable concrete pavement emerges. The layers of the system allow water infiltration, which is correctly directed. The permeable concrete used in the coating layer is composed of binder, coarse aggregate and water, its production allows the incorporation of additives and additions, which can come from waste from the construction industry or agroindustry, such as sugarcane bagasse ash. The incorporation of these ashes into the mixture represents a new use through recycling, contributing to the reduction of waste generation and aligning with the 12th goal of the Sustainable Development Goals. Given the problem at hand, this work aimed to determine the reference trace for permeable concrete intended for pedestrian use and with the incorporation of sugarcane bagasse ash, replacing 5% and 10% of the cement used to produce cylindrical test specimens of 100 mm x 200 mm and plates of 200 mm x 200 mm x 60 mm. In order to analyze the behavior of the traces, the samples were submitted to axial compression resistance and permeability tests. With the results found, it was observed that the incorporation of ash into the mixture reduces the resistance and permeability of permeable concrete. However, they remained within the values identified in the literature and in the standard. It was concluded that the use of ashes is promising, although reducing the parameters analyzed in the study, despite its application being limited to areas of light traffic. It is recommended that dosages and compaction process be reviewed in future studies. As well as, the incorporation of new tests that allow a better characterization of the waste used and the concrete produced.