Análise da influência do teor de umidade na deformação permanente de solos argilosos lateríticos para uso em estruturas de pavimentos

Abstract

The present work proposes to analyze the influence of moisture content variation on permanent deformation, when using lateritic soil as a constituent material of the low-cust pavement layer. The three soil samples used in this research were chosen based on Marangon's (2004) thesis, coming from the Zona da Mata Mineira region and classified by this author according to the MCT methodology, as LG'. The collected soils were submitted to granulometry, compaction, permanent deformation and resilience modulus tests. The materials used in the test of modulus of resilience and permanent deformation were molded at the optimum humidity and 2% above this humidity, and tested in the triaxial equipment of repeated loads. For the permanent deformation test, the materials were subjected to the application of 150,000 load cycles at a frequency of 2Hz. With the data obtained from these mechanical characterization tests, the design of typical pavement structures was proposed, using the MeDiNa program. In this last step, it was analyzed that the variation in the moisture content had a low influence on permanent deformation, and consequently, on the paviments design, since the deformations found for the soils in studies were very low, in both moistures