Evaluation of the permanent and resilient deformation of an alternative laterite used in road pavement

Authors

DOI:

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

Keywords:

Laterita, Permanent deformation, Resilient modulus, Shakedown

Abstract

This study presents the geotechnical characterization of a lateritic soil extracted from an existing pavement section with double surface treatment of the BR-163 highway located in the state of Pará, Brazil. Resilient modulus and permanent deformation characterizations were performed to investigate the lateritic soil behavior during the pavement rehabilitation. The lateritic soil presented CBR (California Bearing Ratio) values below the minimum acceptable to serve as base material of pavements according to DNIT ES 098/2007. However, analysis of pavement mechanics fundamental tests - resilient modulus and permanent deformation - showed excellent behavior. The resilient modulus of the material presented good agreement with several models available in the literature and the results were compared with international reference values. The permanent deformation analysis indicated practically zero contribution of the material to whole track sinking, and the shakedown survey of the occurrence showed a tendency to accommodation in all tests performed in this study. It was concluded that the lateritic soil studied, despite having a CBR value below minimum required standards, can be used as pavement base layer without presenting risk of unsatisfactory performance.

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Published

2021-12-31

How to Cite

Duarte Bona, A. C. ., & Rodrigues Guimarães, A. C. . (2021). Evaluation of the permanent and resilient deformation of an alternative laterite used in road pavement. TRANSPORTES, 29(3). https://doi.org/10.14295/transportes.v29i3.2404

Issue

Vol. 29 No. 3 (2021)

Section

Artigos Vencedores do Prêmio ANPET Produção Científica

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Copyright (c) 2021 Ana Carolina Duarte Bona, Antonio Carlos Rodrigues Guimarães

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