Study of the resilient behavior of five fine soils on the island of São Luís for paving purposes
DOI:
https://doi.org/10.6008/CBPC2179-6858.2020.005.0035Keywords:
Resilience module, Fine soils, Mechanistic analysis, Tropical soilsAbstract
The advancement of pavement mechanics made it possible to analyze the deformability of soils when applying cyclic loads, and thus better represent the field condition. With this in mind, this work aims to investigate the resilient behavior of fine soils from São Luís region, state of Maranhão, as an alternative for use in pavement layers. We studied seven soils, classified according to the MCT Methodology as: one lateritic clayey soil, three lateritic sandyey soils and three non-lateritic siltyey soils. After geotechnical characterization, specimens were molded with modified proctor energy to determine the resilience module by the repeated load triaxial test. Then, with the aid of the STATISTICA 2.0 program, statistical treatments were carried out to define the best model for predicting resilient behavior. The results showed that the models that best fit were the statistical model proposed by NCHRP (2014) and the composite model proposed by Pezo et al. (1992). All the studied samples presented Resilience Modulus values suitable for use in pavement layers. Thus, the research contributed to complete the database of the mechanical behavior of soils of the region and, then, better the accuracy of paving projects.
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