Análise de ensaios índice de suporte califórnia: determinação de traço ótimo de solo-brita com materiais de Alegrete-RS

Abstract

Due to the importance of the road modal for the Brazilian Society, being its main means of transporting cargo and people. And knowing that within the extensive road network used. There is a considerable proportion of unpaved roads with local characteristics, with low traffic volume and that demands low-cost solutions in their construction and maintenance. The present study aims to test materials found in the region of Alegrete-RS, in order to evaluate its performance as a material for road use, focusing on its use on local unpaved roads and as a primary coating layer. After properly collecting and characterizing the samples of the materials used, California Support Ratio tests were carried out, with intermediate compaction energy, for 4 different proportions of soil and gravel. Their results were presented and analyzed in accordance with the relevant technical standards. As results obtained, it was found that all mixtures have the potential to be used as a sub-base layer and primary coating for unpaved roads because they present ISCmax ≥ 20%. At the end, the results were compared and it was considered that the mixture proportion with the best performance was 30%, presenting the second highest maximum density and ISCmax. It is recommended to consolidate this result with modulus of resilience tests in order to assess the durability of each mixture. Keywords: Gravel Roads; Gravel-Soil; Granulometric Stabilization