Evaluation of Rutting in Conventional and Rubberized Asphalt Mixes Using Numerical Modeling Under Repeated Loads

Authors

  • D. A. Saad Department of Civil Engineering, College of Engineering, University of Baghdad, Iraq
  • H. A. Al-Baghdadi Department of Civil Engineering, College of Engineering, University of Baghdad, Iraq
Volume: 11 | Issue: 6 | Pages: 7836-7840 | December 2021 | https://doi.org/10.48084/etasr.4549

Received: 6 October 2021 | Accepted: 19 October 2021 | Online: 11 December 2021


Corresponding author: D. A. Saad

Abstract

This research aimed to predict the permanent deformation (rutting) in conventional and rubberized asphalt mixes under repeated load conditions using the Finite Element Method (FEM). A three-dimensional (3D) model was developed to simulate the Wheel Track Testing (WTT) loading. The study was conducted using the Abaqus/Standard finite element software. The pavement slab was simulated using a nonlinear creep (time-hardening) model at 40°C. The responses of the viscoplastic model under the influence of the trapezoidal amplitude of moving wheel loadings were determined for different speeds and numbers of cycles. The results indicated that a wheel speed increase from 0.5Km/h to 1.0Km/h decreased the rut depth by about 22% and 24% in conventional and rubberized asphalt mixes, respectively. Moreover, increasing the number of cycles from 7,500 (15,000 passes) to 15,000 (30,000 passes) under constant speed increased the rut depth by about 25% and 30% in conventional and rubberized asphalt mixes, respectively. Furthermore, the addition of Crumb Rubber (CR) to the asphalt reduced its rut depth by 55% compared to conventional asphalt.

Keywords:

Rutting, Finite element method, Rubberized asphalt, Repeated load, Creep

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How to Cite

[1]
Saad, D.A. and Al-Baghdadi, H.A. 2021. Evaluation of Rutting in Conventional and Rubberized Asphalt Mixes Using Numerical Modeling Under Repeated Loads. Engineering, Technology & Applied Science Research. 11, 6 (Dec. 2021), 7836–7840. DOI:https://doi.org/10.48084/etasr.4549.

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