Avaliação dos parâmetros de compactação e de permeabilidade de misturas de solo argiloso com resíduos de borracha de pneus

Abstract

In order to assess the feasibility of the use of rubber waste that is produced in the tire retreading process as soil reinforcement material, this work has studied the influence of the addition of tire rubber residues to soil in the compaction and permeability parameters. Thus, samples of clay soil, that are representative of the western region of the State of Santa Catarina, were molded and submitted to the Proctor compaction test, along with mixtures containing 5%, 10%, 15% and 20% of rubber residues of tires. From the specific maximum dry mass optimum moisture content that were determined in the compaction, new test samples were molded and subjected to variable load permeability tests. The results of the compaction tests demonstrate that the maximum specific dry mass and optimum moisture content of the blends are reduced as a result of the increase in the rubber residue content. On the other hand, the permeability coefficient increased as the rubber residues were added. It is concluded, therefore, on the basis of the parameters studied, that the use of the tire rubber residues mixed with the soil should be judicious, recommended mainly as light filler material or in works that have little restrictive permeability criteria.