Análise da mistura de solo argiloso do município de Apucarana e pó de brita para fins de pavimentação

Abstract

The mechanical properties of soils are directly linked to their performance in pavement layers. The typically clay soil present in the region of Apucarana-PR has, by its nature, poor use in the pavement layers due to its low support capacity. The present work has as objective to evaluate the mechanical behavior of a granulometric stabilization of the soil with incorporation of different contents of gravel dust (10, 30 and 50%) and to evaluate its use in the layers of flexible pavements. In this work, undisturbed soil samples were collected from a borrowed deposit and gravel dust was provided by a quarry located in the municipality of Apucarana. The collected materials were used in characterization test, compaction test and California Bearing Ratio. Through the tests performed, it was possible to verify the growth of the dry density and the reduction of the optimal moisture according to the addition of gravel dust in the soil, an increase in the carrying capacity was also observed as an increase in the content of incorporated gravel dust. The highest values found for dry density and CBR were obtained in the sample composed of 50% of gravel dust. The results obtained in the CBR tests showed an increase in the index in relation to the natural soil, based on the criterion for employability in layers of road pavements, the sample with 10% of gravel dust showed satisfactory results for subgrade reinforcement layers, while the samples with 30 and 50% of gravel dust meet the criterion for sub-base layer.