Sustainable Asphalt Rejuvenation by Using Waste Tire Rubber Mixed with Waste Oils

Abstract

Waste materials such as waste tire rubber (WTR), waste cooking oil (WCO), bio-oils, waste engine oil (WEO), and other waste oils have been the subject of various scientific studies in the sustainable and waste research field. The current environmental concerns have been identified to protect natural resources and reuse waste materials. Accordingly, this work reviews the use of recycled waste tire rubber mixed with waste oils (waste cooking oil, waste engine oil) and bio-oils that can be extracted from waste oils to rejuvenate asphalt in reclaimed pavements. This new solution may reduce the massive amounts of WTR and waste oils and produce a more environmentally sustainable material. Reclaimed, aged asphalt has been rejuvenated to achieve various penetration capabilities and properties by blending asphalt with one or more waste materials to evaluate the binder using standard tests. Many solutions with promising results in improving the properties of asphalt mixtures have been selected for further characterization. This review highlights that the addition of WTR and waste materials to rejuvenated asphalt binders improves stability, enhances the viscoelastic properties, provides better fatigue and crack resistance performance, and enhances the compatibility of the rejuvenated rubber oil asphalt. Moreover, the flashing point, softening point, ductility, and penetration of aged asphalt and Poly(styrene-butadiene-styrene)-rubber-rejuvenated and waste-rubber-oil-rejuvenated asphalt were enhanced after applying the rejuvenator compound. On the other hand, adding waste oil to WTR and asphalt reduces the viscosity and enhances the storage stability compared to the asphalt rubber binder.

Study on Pavement Performance of Recycled Asphalt Mixture Modified by Carbon Nanotubes and Waste Engine Oil

“…Cao et al [16] studied the regeneration effect of waste vegetable oil on aging asphalt, and the results showed that waste vegetable oil can not only improve the road performance of aging asphalt, but also ensure its safety performance and anti-aging performance. However, there is still a gap between the performance of a waste engine oil, recycled asphalt binder and new asphalt binder [17][18][19][20]. Therefore, some scholars began to modify the waste engine oil, recycled asphalt binder to improve its performance.…”

Anti-deformation performance of asphalt modified by carbon black extracted from waste cooking oil pyrolysis waste tires rubber

“…Therefore, scholars have attempted to pre-desulfurize CTR by using vegetable oil, waste edible oil, furfural oil, waste engine oil, etc. [2][3][4][5][6].…”