Evaluating the effect of waste material on viscoelastic characteristics of bitumen

Systematic literature review, meta-analysis and artificial neural network modelling of plastic waste addition to bitumen

“…At the polymer level, Sun and Li (2010) mentioned that because the plastic particle tends to swell after absorbing the lightest portion of the bitumen, it results in bigger plastic particles that prevent the internal movement of the mixture. Alternatively, at the mixture level, Farahani et al (2017c) and Al-Abdul explained that the increase of viscosity occurs due to the creation of a three-dimensional network within the bitumen. This network creates an internal movement resistance and thus an increase in the viscosity.…”

“…In terms of the samples that combined plastic and crumb rubber, the improvements in the fatigue resistance can be attributed to the intrinsic properties of the plastomer portion, and better crack resistance due to the crumb rubber portion (Navarro et al, 2009;Yang and Cheng, 2016;Yao et al, 2018). However, it is also important to note that the addition of large quantities of these two elements can considerably increase the viscosity of the binder, and it might provoke the failing of the cracking resistance (Farahani et al, 2017a). Thus, a possible alternative additive is oil, for it could alleviate the workability issue (Maharaj and Maharaj, 2015), and it could also improve the fatigue resistance of the resultant binder (Liu et al, 2018;Yang et al, 2014;Yu et al, 2019).…”

A Practice for the Application of Waste in Road Asphalt Pavements in an Eco-Friendly Way

“…To provide a response to these objectives, in the road pavement sector, the production of more sustainable asphalt pavements is attracting great interest for researchers [2,3]. On the one hand, several waste materials have been employed to enhance the properties of bitumen and asphalt mixtures [4,5]. Those materials include sulphur [6], mineral acids [7] and waxes [8], but the most employed waste materials are the plastics (i.e., polymers) [9,10], which include: Polyethylene Terephthalate (PET) [11], High density polyethylene (HDPE) [12,13], Low Density Polyethylene (LDPE) [14], Polystyrene (PS) [15], Polyurethane (PU) [16,17], Polypropylene (PP) [18], acrylonitrile butadiene styrene (ABS) [19], polyvinyl chloride (PVC) [20][21][22] and ethylene vinyl acetate (EVA) [23,24].…”