Contribuição para o uso de material alternativo em camada de sublastro de ferrovia heavy haul

Authors

  • José Carlos Silva Filho Exército Brasileiro, Instituto Militar de Engenharia. Rio de Janeiro, RJ, Brasil.
  • Antonio Carlos Rodrigues Guimarães Exército Brasileiro, Instituto Militar de Engenharia. Rio de Janeiro, RJ, Brasil.
  • Maria Esther Soares Marques Exército Brasileiro, Instituto Militar de Engenharia. Rio de Janeiro, RJ, Brasil.
  • Carmen Dias Castro Exército Brasileiro, Instituto Militar de Engenharia. Rio de Janeiro, RJ, Brasil.

Keywords:

Railway pavement, Resilient Modulus, Sublast

Abstract

This work is presenting the geotechnical and mechanical characterization of a fine sandy lateritic soil (SAFL) and your performance in the field as sublast layer in railway pavement. The SAFL is properly established in road pavement in Brazil, their use in railway pavement requires special attention. The material was characterized and subjected to repeated load tests, permanent deformation and the California Support Indext,(CBR). In the “in situ” evaluation of the mechanical properties, the Dynamic Cone Penetrometer was used. When using AREMA material selection standards, soils with a predominance of fine soils are discarded because they do not meet the criteria of plasticity index (PI), grain size and CBR. However, when one is about tropical lateritic soil, this material presentnatural cementation, due to the high concentrations of oxide-hydroxides of Fe and Al, which gives this material a peculiar structural behavior. Results obtained, with high resilient modulus and low permanent deformation, corroborate the use of SAFL.

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Published

2020-10-01

How to Cite

Silva Filho, J. C., Guimarães, A. C. R., Marques, M. E. S., & Castro, C. D. (2020). Contribuição para o uso de material alternativo em camada de sublastro de ferrovia heavy haul. Revista Militar De Ciência E Tecnologia, 37(4), 100–111. Retrieved from https://ebrevistas.eb.mil.br/CT/article/view/8621