Comportamento mecânico de um solo da formação Guabirotuba com adição de resíduo de rochas ornamentais

• Ano de defesa: 2019
• Autor(a) principal: Cardoso, Alexandre
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Tecnológica Federal do Paraná; Curitiba; Brasil; Programa de Pós-Graduação em Engenharia Civil; UTFPR
• Palavras-chave em Português: Sedimentologia; Rochas ornamentais - Curitiba, Região Metropolitana de (PR); Geologia física - Paraná; Mecânica do solo; Engenharia civil; Sedimentology; Ornamental rocks - Curitiba, Região Metropolitana de (Brazil); Physical geology - Paraná (Brazil); Soil mechanics; Civil engineering; CNPQ::ENGENHARIAS::ENGENHARIA CIVIL; Engenharia Civil
• Link de acesso: http://repositorio.utfpr.edu.br/jspui/handle/1/4694

The city of Curitiba and metropolitan region are situated over a sedimentary basin characterized by geological unit of Guabirotuba formation. Predominant in this composition silty clays and clayey silts, being possible, the occurrence of granular materials. Due to their physical and mechanical properties, low carrying capacity, high compressibility and erodibility, sedimentary soils often cannot be used in pavement base and subbase material, stabilization of hillside and slope or to support surface foundations. Given the problem of occurrence of soils with properties unsuitable for engineering works, two options are presented, the first is the partial or total removal of the material and the second seeks the improvement of its properties in order to make it suitable for the application that is submitted. In many situations soil improvement is performed by adding residue by middle of soil stabilization techniques. This work will be used ornamental rock waste (RRO) mainly because Brazil occupies the fourth position in the ranking of the largest producers of ornamental rock in the world. Given this perspective, this research sought to conduct a study of the mechanical behavior of a soil of the Guabirotuba Geological Formation in its pure state and later with the addition of ornamental rock residue, in four different contents (3%, 5%, 7% and 9%) and in three cure times (30, 60 and 90 days), to analyze the influence of the residue over time. The main mechanical tests performed were: Proctor compaction at the three energies (normal, intermediate and modified), California Support Index (ISC), unconfined compressive strength (qu), diametral tensile strength (qt), shear strength (f) with undisturbed and compacted samples and one-dimensional consolidation with undisturbed and compacted samples. The addition of residue resulted in an increase in the apparent dry specific weight of the soil due to the bagging and pore refinement effect. The addition of residue provided a gain in compressive strength and soil tensile strength. The ISC of the mixtures presented lower values than the pure soil. The overdensity stresses of the compacted samples (pure soil and mixtures) presented lower values than the undisturbed samples of pure soil. Due to the shape of its particles the residue showed a greater internal friction angle in relation to the pure soil and the mixtures in the direct shear test. The content with 3% residue stood out in improving soil properties. Followed by the 5% RRO content. Followed by the 5% RRO content. The contents with 7% and 9% of RRO presented less satisfactory results in the improvement of the mechanical properties of the soil.