Análise do comportamento mecânico do solo do Campus Universitário de Várzea Grande adicionado do resíduo advindo da mineração de agregados

Abstract

The implementation of road sidewalks requires soils with specific characteristics. Due to the limitations of the technical properties of the materials available on site for paving layers, it is necessary to look for techniques that can improve these characteristics. In this context, soil improvement can be achieved through mechanical stabilization, granulometric stabilization, physical stabilization, or chemical treatment. This research aims to evaluate the variation in expansion and strength of the soil at the Várzea Grande Campus of the Federal University of Mato Grosso (UFMT/CUVG) when three different dosages of residue are added: 20%, 35%, and 50%. The residue, "bica corrida," is sourced from aggregate mining at Caieira Nossa Senhora da Guia Mineração Ltda. Both the soil and the residue were physically characterized. To evaluate the resistance of the mixtures, CBR (California Bearing Ratio) tests were performed, with expansion measurement, comparing the results with the soil without addition. The results of the CBR tests indicated that adding residue to the soil resulted in a reduction in resistance. However, due to the granulometric variability of the residue, it was not possible to estimate an average CBR value for the mixtures, with the soil CBR being 18%. Regarding expansion, it was found that the soil without addition exhibited expansion equal to or less than 0.2%. Even with this low expansion, it was observed that adding 35% residue to the soil further reduced the soil's expansibility values