Comportamento hidromêcanico de misturas de solos areno argilosos com fibras de polipropileno

Hydromechanical Behavior and Crack Formation Process in Expansive Soil Reinforced with Green Coconut Fibers

Abstract

The use of polypropylene fibers as soil reinforcement is applicable when the soil in its natural state does not have the necessary geotechnical properties to withstand the expected stresses in the field. Fibers can bring improvements such as increasing shear resistance and decreasing soil compressibility. Regarding permeability, there is an increase in soil added with fibers, this effect may not represent a negative point, as long as the permeability of the mixture is suitable for field application. This work aims to study the hydromechanical behavior of a sandy-clay soil, used as covering material for a landfill in the State of Ceará, with the insertion of polypropylene fibers, in different fiber contents and lengths, and to verify the influence on geotechnical parameters. soil coverage. As part of the research, laboratory tests for geotechnical and mineralogical characterization were carried out. Polypropylene fibers 6 and 12 mm long were used, with gravimetric contents from 0 to 1.25%. The results indicated gains in resistance with the addition of fibers up to a certain level. Permeability increased progressively with increasing fiber content, but the composite can still be used as a waterproofing layer to cover landfills.