Viabilização do uso de agregado reciclado de concreto na confecção de pavers de concreto permeável

Abstract

The verticalization of buildings and the growth of urban centers has been happening in a proportion higher than the environment supports, thus constituting a threat to the preservation of the environment. The emphasis on sustainability in construction is justified because this sector is prevalent in relation to environmental impacts, since it generates a large percentage of solid waste, decreases infiltration capacity and increases heat islands. Conventional concrete, the most used in civil construction, currently has a waterproof surface, which changes the water quality. The pollutants that are deposited on such surface end up being transported to water systems by rainwater. Another problem is the inadequate disposal of concrete wastes (CW) since there is no space and information on what purpose is ecologically correct for these materials, generating great concern on a global scale. Thus, one way of contributing to the reduction of the impacts generated by the waterproofing of the soil is the production of pervious concrete, a material that allows the percolation of water through its pores, and the reduction of the surface runoff of the rainwater. The contribution to the reduction of concrete residues is to reuse them to produce pervious concrete. This enables to give an appropriate destination to the material, contributing to both aspects of impact. Therefore, this work aims to verify the partial replacement of the conventional aggregate by recycled aggregates of CW, evaluating the hydraulic and mechanical properties of pervious concrete pavers. As a result, was evidenced the possibility of using recycled CW aggregate as a replacement of the conventional aggregate in pervious concrete pavers, for use in pedestrian areas and parking lots.