Parâmetros de compressibilidade e permeabilidade de misturas de areia e finos lateríticos de um sedimento pós-barreiras da cidade de Natal-RN

Abstract

In the scope of Civil Engineering, it is necessary to know the fractions that make up the soil, since its mechanical behavior differs from that of pure soils. The present study seeks to determine the parameters of compressibility and permeability of mixtures of sands and lateritic fines from a Post-Barreiras sediment in the city of Natal, Rio Grande do Norte. The mixtures produced have contents of 0, 10, 20, 30, 40, 50, 75 and 100% of fines. Edometric compression tests were performed for mechanical characterization. It was identified that the fines content influences the compressibility and void ratio of the mixture, depending on the vertical stress applied. The content of transition fines varied in a range between 13% and 25%. Hydraulic conductivity is affected by the fines content of the mixture. For grades up to the transition, the permeability drops drastically, after which its drop is smoothed.