Análise do módulo de resiliência de um solo residual estabilizado com cal hidratada e de carbureto
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Data
2023-12
Autores
Orientador
Weber, Rodrigo Carreira
Banca
Fransozi, Carolina Becker Porto
Gauer, Emanuele Amanda
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Resumo
Apesar do modal rodoviário ser a principal forma de transporte no Brasil, mais da metade das rodovias brasileiras possuem problemas de pavimentação. Um pavimento e sua durabilidade dependem da qualidade das camadas que o compõem. Assim, esta monografia propõe um estudo sobre estabilização de solos através do uso de cal, devido à importância desta técnica na construção de pavimentos. Foi utilizada a cal de carbureto em comparação à cal hidratada como uma forma de utilizar rejeitos industriais na construção civil. Para avaliar a estabilização do solo com cal, foi realizado o ensaio triaxial cíclico, com a finalidade de simular os carregamentos sofridos pelos pavimentos com o trânsito de veículos sobre eles. Os teores de 6% e 10% de carbureto e 10% e 12% de cal hidratada foram adicionados ao solo, determinados através do ensaio de pH. Os resultados foram analisados considerando as características do solo, as tensões aplicadas e o ajuste aos modelos matemáticos k-σd, k-σ3 e k-θ. Também foi realizado um ensaio de compressão simples no teor de 12% de cal hidratada para validar o comportamento da mistura com a literatura. Os resultados mostraram um módulo resiliente significativamente maior para a cal de carbureto em relação à cal hidratada, sendo os melhores resultados obtidos com o teor de 10% de cal de carbureto. A umidade da mistura foi a característica dos corpos de prova que mais influenciou nos resultados. O modelo que melhor se ajustou às misturas de cal de carbureto foi o k-σ3, mostrando a dependência da mistura à tensão confinante. Nenhum modelo se ajustou à cal hidratada. Em suma, os resultados obtidos foram coerentes com demais estudos que avaliaram solos estabilizados com cal. As cais melhoraram as propriedades do solo, embora seja necessário um certo teor de cal para ele ser considerado estabilizado.
Although highway transportation is the main form of transport in Brazil, more than half of Brazilian highways have paving problems. A pavement and its durability depend on the quality of the layers that make it up. Therefore, this research proposes a study on soil stabilization through the use of lime, due to the importance of this technique in the construction of pavements. Carbide lime was used in comparison to hydrated lime as a way of using industrial waste in civil construction. To evaluate the stabilization of the soil with lime, the cyclic triaxial test was carried out, with the purpose of simulating the loads suffered by the pavements with the traffic of vehicles over them. The contents of 6% and 10% carbide and 10% and 12% hydrated lime were added to the soil, determined through the pH test. The results were analyzed considering the characteristics of the soil, the applied stresses and the adjustment to the mathematical models k-σd, k-σ3 and k-θ. A simple compression test was also carried out with a content of 12% hydrated lime to validate the behavior of the mixture according to the literature. The results showed a significantly higher resilient modulus for carbide lime compared to hydrated lime, with the best results being obtained with a content of 10% carbide lime. The moisture content of the mixture was the property of the sample that most influenced the results. The model that best fitted carbide lime mixtures was k-σ3, showing the dependence of the mixture on confining stress. No model adjusted to hydrated lime. In short, the results obtained were consistent with other studies that evaluated soils stabilized with lime. The limes improved the properties of the soil, although a certain lime content is required for it to be considered stabilized.
Although highway transportation is the main form of transport in Brazil, more than half of Brazilian highways have paving problems. A pavement and its durability depend on the quality of the layers that make it up. Therefore, this research proposes a study on soil stabilization through the use of lime, due to the importance of this technique in the construction of pavements. Carbide lime was used in comparison to hydrated lime as a way of using industrial waste in civil construction. To evaluate the stabilization of the soil with lime, the cyclic triaxial test was carried out, with the purpose of simulating the loads suffered by the pavements with the traffic of vehicles over them. The contents of 6% and 10% carbide and 10% and 12% hydrated lime were added to the soil, determined through the pH test. The results were analyzed considering the characteristics of the soil, the applied stresses and the adjustment to the mathematical models k-σd, k-σ3 and k-θ. A simple compression test was also carried out with a content of 12% hydrated lime to validate the behavior of the mixture according to the literature. The results showed a significantly higher resilient modulus for carbide lime compared to hydrated lime, with the best results being obtained with a content of 10% carbide lime. The moisture content of the mixture was the property of the sample that most influenced the results. The model that best fitted carbide lime mixtures was k-σ3, showing the dependence of the mixture on confining stress. No model adjusted to hydrated lime. In short, the results obtained were consistent with other studies that evaluated soils stabilized with lime. The limes improved the properties of the soil, although a certain lime content is required for it to be considered stabilized.
Descrição
Palavras-chave
Módulo de resiliência; Cal hidratada; Cal de carbureto; Estabilização de solos; Resilience module; Hydrated lime; Carbide lime; Soil stabilization
Citação
NARDI, Marco Tulio. ANÁLISE DO MÓDULO DE RESILIÊNCIA DE UM SOLO RESIDUAL ESTABILIZADO COM CAL HIDRATADA E DE CARBURETO. 2023. Monografia (Graduação em Engenharia Civil) – Universidade do Vale do Taquari - Univates, Lajeado, 11 dez. 2023. Disponível em: http://hdl.handle.net/10737/4190.