A New Life for Cross-Linked Plastic Waste as Aggregates and Binder Modifier for Asphalt Mixtures

Every year, millions of tons of plastic waste, with potential to be reused, are wasted in landfills. Based on a literature review and in a local market analysis, cross-linked polyethylene (PEX) waste arose as the material with the greatest potential to be tested for incorporation in asphalt mixtures due to the difficulty in its recycling and the lack of solutions for its reuse. Thus, in the present work, mixtures produced with and without PEX were tested in order to compare their performance, aiming at understanding if this waste could successfully be used as an alternative material for this type of application. Thus, water sensitivity, rutting resistance, stiffness modulus and fatigue cracking resistance tests were carried out on asphalt mixtures with up to 5% PEX. Based on the results obtained, it can be concluded that the incorporation of PEX in asphalt mixtures is a viable solution for paving works, especially when high service temperatures are expected. It also decreases the density of the mixture, which can be attractive to lighten structures. Thus, this technology contributes to give new life to cross-linked polyethylene plastic waste.

[1]  Payam Shafigh,et al.  Using waste plastic bottles as additive for stone mastic asphalt , 2011 .

[2]  Gordon Airey,et al.  Rheological evaluation of ethylene vinyl acetate polymer modified bitumens , 2002 .

[3]  R. Vasudevan,et al.  A technique to dispose waste plastics in an ecofriendly way – Application in construction of flexible pavements , 2012 .

[4]  Mohammad T. Awwad,et al.  The Use of Polyethylene in Hot Asphalt Mixtures , 2007 .

[5]  Yong Zhang,et al.  Pyrolyzed wax from recycled cross-linked polyethylene as warm mix asphalt (WMA) additive for SBS modified asphalt , 2011 .

[6]  B. Birgisson,et al.  Polymer modification of bitumen : Advances and challenges , 2014 .

[7]  Karol J. Kowalski,et al.  Thermal and Fatigue Evaluation of Asphalt Mixtures Containing RAP Treated with a Bio-Agent , 2017 .

[8]  Joel Oliveira,et al.  Optimization of warm mix asphalts using different blends of binders and synthetic paraffin wax contents , 2010 .

[9]  Joel Oliveira,et al.  Are totally recycled hot mix asphalts a sustainable alternative for road paving , 2012 .

[10]  M. O’Mahony,et al.  RECYCLED POLYMERS FOR USE AS BITUMEN MODIFIERS , 2001 .

[11]  M. Gilchrist,et al.  Development of a recycled polymer modified binder for use in stone mastic asphalt , 2008 .

[12]  S. Zoorob,et al.  Laboratory design and investigation of the properties of continuously graded Asphaltic concrete containing recycled plastics aggregate replacement (Plastiphalt) , 2000 .

[13]  Moisés García-Morales,et al.  Viscous properties and microstructure of recycled eva modified bitumen , 2004 .

[14]  Shaopeng Wu,et al.  Study of the Diffusion of Rejuvenators and Its Effect on Aged Bitumen Binder , 2017 .

[15]  Mohamed Rehan Karim,et al.  A review of using waste and virgin polymer in pavement , 2012 .

[16]  Feng Zhang,et al.  The research for high-performance SBR compound modified asphalt , 2010 .

[17]  Joel Oliveira,et al.  Recycled asphalt mixtures produced with high percentage of different waste materials , 2015 .

[18]  Yvonne Becker,et al.  Polymer modified asphalt , 2001 .

[19]  F. Martínez-Boza,et al.  Evaluation of thermal and mechanical properties of recycled polyethylene modified bitumen , 2008 .

[20]  S. Colagrande,et al.  PVC AND PET PLASTICS TAKEN FROM SOLID URBAN WASTE IN BITUMINOUS CONCRETE , 2000 .

[21]  Joel Oliveira,et al.  The role of a surfactant based additive on the production of recycled warm mix asphalts – Less is more , 2012 .