Flexible Pavement Design Criterion Based on Octahedral Shear Stresses

Open access

Abstract

The judicious pavement design is the key factor in achieving the longest service life and the lowest maintenance and rehabilitation costs. It is based on the consideration of the phenomena in which the pavement structures are subjected to exploitation and the limitation of their destructive effects.

The aim of this study is to verify the possibility of implementing in the flexible pavement structures design practice of another design criterion based on limiting the bituminous mixtures creep phenomenon and that to be called: The criterion of admissible octahedral shear stresses in the bituminous layers.

Estimation of octahedral shear stresses is done with a calculation model based on finite element method, and hereafter referred to as 2D ASFEM (2D Axi-Symmetric Finite Element Model). The paper presents the results obtained by modeling several specific calculation assumptions for the behaviour of flexible pavement structures in service.

The study underlines the fact that the Octahedral Shear Stresses Ratio (OSSR) can be an additional design criterion to be taken into account when designing flexible pavement structures alongside other established criteria.

REFERENCES

  • [1]. Ş.M. LAZĂR, “Contributions to the Overlay Design of Flexible Pavement Systems”, PhD thesis, TUCEB, September 2011.

  • [2]. T.J., FREEMAN şi S.H., CARPENTER, “Characterizing Permanent Deformation in Asphalt Concrete Placed over Portland Cement Concrete Pavements”, In Transportation Research Record: Journal of the Transportation Research Board, No. 1070, Transportation Research Board of the National Academies, Washington, D.C., pp. 342–387, 1986.

  • [3]. C., RĂCĂNEL, “Effects of Creep and Fatigue on the Behaviour of Asphalt Mixtures”, PhD thesis, TUCEB, March 2002.

  • [4]. ***, PIARC (Permanent International Association of Road Congresses), “Bituminous Materials with a High Resistance to Flow Rutting”, PIARC Technical Committee on Flexible Roads, Reference 08.03.B, 1995.

  • [5]. M., AMERI-GAZNON şi D.N., LITTLE, “Permanent Deformation Potential in Asphalt Concrete Overlay over Portland Cement Concrete Pavements”, Research Report 452-3F, Texas Transportation Institute, nov. 1988.

  • [6]. M., AMERI-GAZNON şi D.N., LITTLE, “Octahedral Shear Stress Analyses of an ACP Overlay on a Rigid Base”, Journal of the Association of Asphalt Paving Technologists, Vol. 59, pp. 443–476, 1990.

  • [7]. S., JERCAN, C., ROMANESCU and M., DICU, “Road construction. Laboratory Tests”, Institute of Construction Bucharest (ICB), 1992.

Romanian Journal of Transport Infrastructure

The Journal of Technical University of Civil Engineering Bucharest

Journal Information

Metrics

All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 11 11 11
PDF Downloads 1 1 1