Avaliação do comportamento resiliente não saturado de três solos típicos de subleito do Recôncavo Baiano

Abstract

The mechanical behavior of soil is directly related to deformation and strength parameters. As a study approach, there is the triaxial resilience modulus test that analyzes these parameters for a specific material, whether saturated or not. The resilience modulus, in turn, is related to suction, which can be determined by its characteristic water retention curve using different methodologies. Therefore, the objective of this study was to analyze the unsaturated behavior of three typical soils in the Recôncavo region of Bahia, including a Dystrocohesive Yellow Latosol, a vertisol, and a granulite residual, at different soil saturation levels above, below, and at their optimum moisture content through resilience modulus tests. The samples were compacted using the Standard Proctor energy, and test specimens with dimensions of 100 mm in diameter and 200 mm in height were formed, triplicated for each saturation level (30%, 50%, 70%, 95%, and optimum moisture). With the average results obtained from the triaxial test, it was observed that as the soil saturation level increased, there was a decrease in the resilience modulus and vice versa. Additionally, this can be correlated with suction, which is directly proportional to the resilience modulus. Therefore, it can be concluded that sandy soils are in a more favorable condition for pavement due to their ease of drainage and suction, in addition to their high resilience modulus values.