Investigating the Creep Properties of PET-Modified Asphalt Concrete

Document Type : Research Papers


1 assistant professor, civil engineering department, university of zanjan, zanjan, Iran

2 Civil Engineering Department, University of Zanjan, Zanjan, Iran


This study has investigated the creep properties of asphaltic concrete modified with different dosages of waste polyethylene terephthalate (PET) in two different ranges of size. Uniaxial dynamic creep test at 40°C was conducted on the cylindrical specimens of the mixtures. The load was applied in two different frequencies of 0.5 and 5Hz. Creep test results showed that the accumulated strain under dynamic loading increased with increasing PET content, with lower values for the mixtures containing finer PET particles. Moreover, it was found that the accumulated strain under the loading with higher frequency was more than that under lower frequency, with higher sensitivity to frequency for the mixtures containing finer PET. The results of dynamic creep tests were used for determination of the constants of a three stage model. The linear creep slope in the second region of the creep curve and the flow number showed that the increase of PET content and size results in decrease of permanent deformation resistance. However, the mixtures modified with 4% of fine and coarse PET particles had the highest loading cycles at the end of primary creep region, where most of the strain was recoverable.


Main Subjects

Ahmad, A.F., Razali, A.R. and Razelan, I.S.M. (2017). "Utilization of polyethylene terephthalate (PET) in asphalt pavement: A review", Proceedings of the Mechanical Engineering, Science and Technology International Conference, Johor Bahru, Malaysia.
Ahmadinia, E., Zargar, M., Karim, M.R., Abdelaziz M. and Shafigh, P. (2011). "Using waste plastic bottles as additive for stone mastic asphalt", Materials and Design, 32(10), 4844-4849.
Ahmadinia, E., Zargar, M., Karim, M.R., Abdelaziz, M. and Ahmadinia, E. (2012). "Performance evaluation of utilization of waste Polyethylene Terephthalate (PET) in stone mastic asphalt", Construction and Building Materials, 36(2), 984-989.
Almeida, J.A., Rodrigues, J.K.G., Carvalho, M.W., Lucena L.C. and Cavalcante, E.H. (2017). "Mechanical performance of asphalt mixtures using polymer-micronized PET-modified binder", Road Materials and Pavement Design, 19(4), 1001-1009.
Baghaee Moghaddam, T., Karim, M.R. and Syammaun, T. (2012). "Dynamic properties of stone mastic asphalt mixtures containing waste plastic bottles", Construction and Building Materials, 34(1), 236-242. doi:10.1016/j.conbuildmat.2012.02.054.
Baghaee Moghaddam, T., Soltani, M., Karim, M.R. (2014a). "Evaluation of permanent deformation characteristics of unmodified and Polyethylene Terephthalate modified asphalt mixtures using dynamic creep test", Materials and Design, 53(5), 317-324.
Baghaee Moghaddam, T., Soltani, M. and Karim, M.R. (2014b). "Experimental characterization of rutting performance of polyethylene terephthalate modified asphalt mixtures under static and dynamic loads", Construction and Building Materials, 65(1), 487-494.
Container Recycling Institute ( accessed 20 July 2017.
Earnest, M.D. (2015). "Performance characteristics of Polyethylene Terephthalate (PET) modified asphalt", Ph.D Thesis, Georgia Southern University.
Geyer, R., Jambeck, K.J. and Law, K.L. (2017).  "Production, use and fate of all plastics ever made" Science and Advances, 3(2), 1-5.
Hassani, A., Ganjidoust, H. and Maghanaki, A.A. (2005). "Use of plastic waste (poly-ethylene terephthalate) in asphalt concrete mixture as aggregate replacement", Waste Management Resources, 23(4), 322-327.
Management and Planning Organization. (2012). Iranian Highways Asphaltic Pavements (IHAP) code, Publication No. 234, 2nd Edition Tehran, Iran.
Katman, H.Y., Ibrahim, M.R., Karim, M.R., Mashaan, N.S. and Koting, S. (2015). "Evaluation of permanent deformation of unmodified and rubber-reinforced SMA asphalt mixtures using dynamic creep test", Advances in Material Science and Engineering, 2015, Article ID 247149, 1-12.
Modarres, A. and Hamedi, H. (2014a). "Developing laboratory fatigue and resilient modulus models for modified asphalt mixes with waste plastic bottles (PET)", Construction and Building Materials, 68(1), 259-267.
Modarres, A. and Hamedi, H. (2014b). "Effect of waste plastic bottles on the stiffness and fatigue properties of modified asphalt mixes", Materials and Deign, 61(1), 8-15.
Shukla, S.R. and Harad, A.M. (2006). "Aminolysis of polyethylene terephthalate waste", Polymer Degradation and Stability, 91(8), 1850-1854.
Sinha, V., Patel, M.R. and Patel, J.V. (2010). "PET Waste management by chemical recycling: A review", Journal of Polymers and Environment, 18(1), 8-25.
Taherkhani, H. (2016). "Investigation of asphalt concrete containing glass fibers and nanoclay", Journal of Civil Engineering Infrastructures, 49(1), 45-58.
Taherkhani, H. and Afroozi, S. (2017). "Investigating the performance characteristics of asphalt concrete containing nano-silica", Journal of Civil Engineering Infrastructures, 50(1), 75-93.
Taherkhani. H. and Arshadi, M.R. (2017). "Investigating the mechanical properties of asphalt concrete containing waste polyethylene terephthalate (PET)", Road Materials and Pavement Design, 1-18.
Zhou, F., Scullion, T. and Sun, L. (2004). "Verification and modeling of three-stage permanent deformation behavior of asphalt mixes", Journal of Transportation Engineering, ASCE,130(4), 486-494.