Análise do comportamento físico e mecânico do solo do Campus Universitário de Várzea Grande adicionado da CAL CH I

Abstract

Research into stabilizing soils with hydrated lime is essential in regions with tropical saprolitic soils, which are found on the UFMT Campus in Várzea Grande. These soils have challenging geotechnical characteristics, such as expansibility and low mechanical strength, which directly affect their use in paving works. In this context, the study is justified by the need to improve the physical and mechanical properties of this soil, providing a more economical and sustainable solution for its application in infrastructure. Following standard 419 (DNIT, 2019), the minimum dosage of lime needed to stabilize the soil was determined, in order to achieve a pH of 12.4. Laboratory tests, such as the California Bearing Ratio (CBR) and expansion tests, were carried out to assess the behavior of the soil before and after the addition of different levels of lime. The results indicated a significant increase in mechanical strength, with the CBR going from 18% in the natural state to 42% with 3.5% lime, and for expansion measured in the CBR, the natural soil went from 0.20 to 0.04 with the addition of 3.5% lime, proving to be effective in controlling expansion and increasing strength. It can therefore be concluded that the addition of hydrated lime can be a viable and efficient alternative for improving the geotechnical properties of saprolitic soil, providing a stable base for paving.