Estudo da Influência do Tempo de Cura em Misturas de Solo-Agregado Reciclado

While the construction industry favors the growth of a nation's economy, it contributes decisively to environmental degradation in the world, whether in the intensified generation of waste or in the high consumption of raw materials. However, for some time now, the problems resulting from construction and demolition activities have already been a source of concern in some countries, which, due to a lack of abundant raw materials in their territory, are using technically and economically viable alternatives, which in the end end up favoring the reduction of environmental impacts on the planet. However, in countries such as Brazil, there are not many studies that seek the efficient use of construction and demolition waste. Thus, the present work sought to investigate the mechanical behavior of recycled soil-aggregate mixtures at different cure times. For this, mixtures of soil and recycled aggregates were prepared at concentrations of 15%, 30% and 45% of RA in relation to the dry weight of the soil, with the specimens of each mixture being cured at 7, 14 and 28 days. For the mechanical evaluation, the CPs were submitted to simple compression tests, where it was possible to analyze the tensions and deformations at the rupture. Based on the results, it was concluded that the curing procedure slightly favored the improvement of the resistance to situations of lower concentration of recycled aggregate (30% and, mainly, 15%). However, in the case of samples containing 45% of recycled aggregate, the increase in curing time, resulted in a decrease in the resistance to simple compression.