Evaluation of the relationship between mechanical and hydraulic behavior for railway ballast: case study

Authors

  • Daianne Fernandes Diógenes Universidade Federal do Ceará, Ceará – Brasil
  • Verônica Teixeira Franco Castelo Branco Universidade Federal do Ceará, Ceará – Brasil
  • Laura Maria Goretti Motta Universidade Federal do Rio de Janeiro, Rio de Janeiro – Brasil

DOI:

https://doi.org/10.14295/transportes.v28i3.1829

Keywords:

Railway ballast. Shape properties. Mechanical behavior. Hydraulic behavior.

Abstract

The performance of the rail ballast layer is dependent on the physical, mechanical and hydraulic characteristics as well as the characteristics of other components such as vehicle and track speed. This study aims to evaluate ballast materials, in various application phases, regarding mechanical and hydraulic behavior. For this purpose, traditional aggregate shape tests, advanced aggregate shape properties tests were performed using digital image processing, resilience modulus, permanent deformation and hydraulic conductivity. The results showed that greater permanent axial deformation does not necessarily imply lower hydraulic conductivity for the materials evaluated in this study. The mechanical behavior was changed from the changes in the shape properties of the aggregates (2D shape and texture), as well as the particle size. The hydraulic conductivity remained the same for the three materials evaluated, even after the mechanical tests. Overall, the three materials were considered prone to breakage, but although they went through construction and operation, they were all classified as clean.

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Published

2020-08-31

How to Cite

Diógenes, D. F., Castelo Branco, V. T. F., & Motta, L. M. G. (2020). Evaluation of the relationship between mechanical and hydraulic behavior for railway ballast: case study. Transportes, 28(3), 61–74. https://doi.org/10.14295/transportes.v28i3.1829

Issue

Vol. 28 No. 3 (2020)

Section

Articles

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