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Matéria (Rio de Janeiro)

versão On-line ISSN 1517-7076

Resumo

CASTRO, Carlos Eduardo Neves de et al. Mechanical behavior of clay soil stabilizedwith glass residue powdered in high-energy and ball mills. Matéria (Rio J.) [online]. 2019, vol.24, n.2, e12356.  Epub 10-Jun-2019. ISSN 1517-7076.  https://doi.org/10.1590/s1517-707620190002.0671.

The capital of the Amazonas State presents difficulties in the construction of pavements due to the superficial predominance of clay in its geotechnical profile. This material is unsuitable for the construction of sublayers of these urban structures. In the present study, the mechanical behavior of the Manaus-AM typical clay soil was evaluated in its natural condition and when mixed with 5% of powdered glass waste processed in two types of mills (balls and high energy) in order to improve their geotechnical properties. The natural material and its compositions was characterized in relation to their physical properties (liquidity limit, plasticity limit, grain size and compaction) and mineralogical properties, as well as the natural soil mineralogy. According to the direct shear test and the Coulomb rupture criterion, the cohesion and the internal friction angle of the clay soil were determined, as well of the soil compositions with 5% of powdered glass processed in ball mill and 5% of powdered glass processed in high-energy mill. The results showed that there was a significant improvement in the regional soil properties when glass residue is added, both physically and mechanically, with emphasis on the participation of the powdered material processed in the high-energy mill. Therefore, the powdered glass has the potential to be used as granulometric stabilizer in roadways construction, which is an environmental alternative for the disposal of such materials.

Palavras-chave : soil; glass residue; high-energy mill; cohesion; angle of friction.

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