Análise da resistência a compressão de um solo arenoso com a adição de fibras provenientes de garrafa pet

Abstract

The use of fibers as soil reinforcement generates a composite called fibrosoil. Soils added by certain types of fibers may show improvements in many engineering parameters, such as compressive strength, where the inclusion of fibers increases the mechanical capacity of the composite material. The present work aims to analyze the behavior of soils reinforced with fibers from PET bottles, submitted to simple compression tests. The experimental program consisted in carrying out tests with the characterization of the soil for the studied field. For the compaction tests, the contents of 1.0 and 2.0% of fibers of 20 mm in length were tested, where significant changes were recorded for optimum moisture with the addition of 2% fiber. The simple compression tests for the contents of 1.0% and 1.5% of fibers were carried out for 10 and 20 mm lengths of plain fiber and 20 mm of scarified fiber.In this research, we seek to compare and evaluate the natural soil behavior and fiber additions. The effects of different fiber lengths and fiber contents on the mechanical properties of the samples will be compared through the stress strain curve. From the analysis of the results, it was possible to observe changes in the resistance provoked by the addition of PET fibers in the matrix of the studied soil. The addition of fibers generally provided an increase in peak and post-peak compression strength, where the samples with fiber addition showed higher deformations until reaching rupture, that is, they provided greater ductility for mixing with addition of fibers . The influence of the addition of fibers to the soil, recorded better results for the fibers of greater length, and not necessarily for the greater percentages. The optimum blend achieved in this study was the addition of 1% 20 mm long scarified fiber.