AVALIAÇÃO DA RESISTÊNCIA AO CISALHAMENTO DE UM SOLO RESIDUAL DE LAMITO COM ADIÇÃO DE FIBRAS DE POLIPROPILENO

: Aiming to meet the various soil conditions desired in engineering projects, the objective of the present study is to evaluate the geomechanical behavior of a mudstone residual soil compacted at the Intermediate Proctor energy with the addition of polypropylene fibers. The soil sample was taken at the city of Gravataí / RS. Soil characterization (grain specific mass, particle size and Atterberg limits), compaction and consolidated drained shear strength tests were conducted with samples of pure soil and with the addiction of 0.5%, 0,75% and 1.0% of fibers relative to the total mass of soil. It was expected that the optimum amount of fibers to be added would be between the percentages of 0.5% and 1.0%, however, the greatest increase in soil resistance was seen in the addition of 0.5%, while the additions of 0.75% and 1.0% of fibers caused an increase in the volume of voids and a reduction of the internal friction angle when compared to the addition of 0.5%.