Ensaio de adensamento oedométrico em solos reforçados com cal, cimento Portland e cinza de casca de arroz

Abstract

The study investigated the coefficients of densification of a soil from the West of Rio Grande do Sul, extracted from a deposit located in Alegrete. The tests were performed with the natural soil and improved from lime additions, cement and rice hull ash (RHA). The soil improvement techniques with the lime and cement are already known and widely used. What is proposed here is to observe the mixture of these agents with percentages of RHA, which are waste generated from the rice blast and disposal, many times, in a inappropriate way, causing major impacts. Samples were compressed into CPs in the natural soil and in mixtures with additions of 10% lime + 15% RHA cement and 10% + 15% RHA. The traces were selected based on previous studies that showed these traces with the most efficient performance over the simple direct compression and shear. The compaction tests were performed in a satured way and all CPs tested were performed in 28-day cure or more. The results show a decrease in the densitification’s coefficients in reinforced soil.