Avaliação do uso de cinzas de carvão mineral produzidas em usina termelétrica na construção de pavimentos

Abstract

The use of residues produced in thermoelectric plants can represent an alterna9ve for the construc9on of economical and sustainable pavements. The objec9ve of this re-search was to evaluate the use of coal ashes from a thermoelectric plant, located in the Metropolitan Region of Fortaleza, in layers of pavements. Ini9ally, the ashes that were arranged in a module of the thermoelectric plant were characterized and it was proved that the materials, besides heterogeneous, had no sa9sfactory mechanical behavior. Thus, it was produced laboratory mixtures of ash-soil-lime and they were subjected to different test (compac9on, resilience module, permanent deforma9on, simple compres-sion resistance and tensile strength by diametral compression) of interest in the paving area. Subsequently, pavement structures were designed using a mechanis9c-empirical method with the mixtures that presented more sa9sfactory mechanical results. It was concluded that the reu9liza9on of thermoelectric residues in paving represents poten-9al alterna9ve for construc9on of economical and self-sustainable pavements.