Volume 43, N. 2, April-June 2020 | PDF(21 downloads)
Products derived from tires have been increasingly used for geotechnical engineering applications because of the economic, environmental, and social benefits they provide. The objective of this paper is to analyze the effect of the addition of rubber fibers from unserviceable tires on the hydromechanical behavior of argillaceous soil from the Barreiras Formation, in the Brazilian northeast. Soil mixtures were prepared containing 10 % and 20 % tire fibers, by weight, at optimum moisture and maximum dry specific weight. Their microstructure, shear strength, and permeability were evaluated. The Scanning Electron Microscopy (SEM) analysis indicates changes in the soil microstructure from the addition of the fibers and there is an intense interaction of fiber with the soil matrix. There is an increase in the shear strength of the blends by up to 47 %, making them more ductile. The saturated hydraulic conductivity of the soil is in the order of 10-10 m/s, assuming values between 10-8 and 10-6 m/s when the tire fibers are inserted into the structure.