Estudo de melhoria de areia eólica sob a adição de solo de textura fina e estabilizante químico para aproveitamento em estradas não pavimentadas

Abstract

In the southwest region of Rio Grande do Sul, the degrading sites due to sanding total over 130,000 hectares, generating an environmental and socioeconomic impact. Another problem is the poor condition of unpaved agricultural highways. The present work has the objective to study the geotechnical behavior of a graded (SP), stabilized with elastic sandy (MH) and hydrated wind, with different mixing proportions, 75% -25% -0%, 80% - 20. % -0%, 85% - 15%, 75% -20% -5%, 80% -15% -5%, and 85% -10% -5%. According to the results obtained, the treatment of sand and soil wind: 75% -20% -5%, compared to the tests, shows the smallest maximum dry mass, the highest optimum sample content and the highest simple compressive strength. The addition of hydrated lime in the mixtures decreased as color specific masses. In addition, all blends when compressed under normal Proctor energy have acceptable California Bearing Ratio (CBR) for subgrade and underlay reinforcement. Finally, a fine soil-wind-sand mixture: 75% -20% -5% exhibits the appropriate CBR for sub-base tiering.