2025-09-182025-09-182025-07-16https://repositorio.ifal.edu.br/handle/123456789/1250This study aimed to investigate the unconfined compressive strength behavior of a clayey sand (SC) soil from the Maceió-AL region, Brazil, when reinforced with geosynthetics, specifically a unidirectional geogrid and a MACGRID NET® geotextile. To achieve this, the physical characterization of the soil was performed, along with the determination of its compaction curve, and a comparative evaluation of the compressive strength of unreinforced and reinforced soil. The methodology included consistency limit tests (LL of 24.46% and LP of 13.76%), grain size analysis, and compaction tests, which determined a maximum dry specific weight of 1.84 g/cm3 and an optimum moisture content of 13.8%. The main phase involved unconfined compression tests on unreinforced soil specimens (CP-S), geogrid-reinforced soil (CP-GGR), and geotextile-reinforced soil (CP-GTX), following ABNT (NBR 12770, 2022). The results demonstrated that the geogrid increased the unconfined compressive strength by approximately 36.75%, while the geotextile provided a gain of 8.54%. For small deformations (2% axial deformation), the resistance increased by about 52% with the geogrid and 64% with the geotextile, compared to the unreinforced soil. Future perspectives include the study of different types of geosynthetics, layout variations, triaxial tests, and field-scale studies for technical and economic validation.ptAttribution-ShareAlike 3.0 BrazilMatemática - LicenciaturaGeossintéticos - GeogrelhaSolo - Compressão simplesGeosynthetics - GeogridSoil - CompressiveTrabalho de Conclusão de CursoCIENCIAS EXATAS E DA TERRA::MATEMATICA