Avaliação da deformação permanente e resiliente de uma laterita alternativa utilizada em base de pavimento rodoviário

Autores

DOI:

https://doi.org/10.14295/transportes.v29i3.2404

Palavras-chave:

Laterita, Deformação permanente, Modulo resiliência, Shakedown

Resumo

No presente trabalho são apresentados resultados dos ensaios de caracterização geotécnica, de módulo resiliente e de deformação permanente de um solo laterítico oriundo do pavimento de um trecho existente da rodovia BR-163/PA, revestido com tratamento superficial duplo, e em fase de execução de restauração do pavimento. Mostra-se que a laterita apresentou valores de CBR (California Bearing Ratio) inferiores ao mínimo aceitável para constituir material de base de pavimentos de acordo com a Norma DNIT ES 098/2007, porém quando se analisou os resultados dos ensaios fundamentais da mecânica dos pavimentos - módulo resiliente e deformação permanente - verificou-se que o material apresentou excelente comportamento. São apresentados enquadramentos do módulo resiliente do material em diversos modelos disponíveis na literatura e comparados os resultados com valores de referências internacionais. A análise da deformação permanente indicou contribuição praticamente nula do material para o afundamento de trilha de roda total, e a pesquisa de ocorrência do shakedown mostrou tendência ao acomodamento em todos os ensaios realizados. Conclui-se que a laterita estudada, apesar de apresentar valor de CBR inferior ao mínimo exigido por norma, pode compor a camada de base do pavimento sem risco de desempenho insatisfatório.

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Publicado

31-12-2021

Como Citar

Duarte Bona, A. C. ., & Rodrigues Guimarães, A. C. . (2021). Avaliação da deformação permanente e resiliente de uma laterita alternativa utilizada em base de pavimento rodoviário. TRANSPORTES, 29(3). https://doi.org/10.14295/transportes.v29i3.2404

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