The Constitutive Modeling of Unpaved Flexible Pavement Under Static Loading

Praveen Aggarwal

Department. of Civil Engineering, NIT, Kurukshetra, India

K. K. Gupta

Department of Civil Engineering, IIT Delhi, India


K. G. Sharma

Department of Civil Engineering, IIT Delhi, India


An experimental study is carried out to numerically model the behavior of unpaved flexible pavement materials. Behavior of constituting materials, which comprise the Yamuna sand and Water Bound Macadam (WBM) are studied under drained triaxial tests at three different confining pressures of 50, 100 and 200 kPa with specimen size of 100mm diameter and 200mm height. The hierarchical single surface model (HISS), developed by Desai and co-workers is used to model the constituting materials. Predicted stress-strain-volume change behavior of the two materials match closely with the observed results. A model pavement was tested under static loading and load-penetration behavior was obtained. The verified models of the constituting materials are applied to the model pavement using FEM and predicted results are compared with the experimentally obtained results.

Keywords: Flexible pavement, WBM, Yamuna sand, numerical modeling, finite element method.

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