A review of the feasibility of using crumb rubber derived from end-of-life tire as asphalt binder modifier
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REVIEW
A review of the feasibility of using crumb rubber derived from end‑of‑life tire as asphalt binder modifier Abdalrhman Milad1 · Abobaker G. F. Ahmeda2 · Aizat Mohd Taib1 · Suzielah Rahmad1 · Mohmed Solla3 · Nur Izzi Md Yusoff1 Received: 23 October 2019 / Accepted: 20 August 2020 © The Malaysian Rubber Board 2020
Abstract The use of recycled crumb rubber (CR) in asphalt pavements could be an essential step towards ensuring a more sustainable future in addition to opening a new investment opportunity for global investors. Asphalt modifiers have the ability to enhance the performance of flexible pavements and contribute towards ensuring a more sustainable environment. The utilization of CR produced from end-of-life tires (ELTs) as an asphalt modifier has been shown to enhance asphalt performance with regard to high-temperature rutting and low-temperature thermal cracking due to the remarkable characteristics of the CR. This paper presents the findings of previous studies, including the grinding of ELTs to obtain crumb rubber, the technology employed in the process, and the physical and mechanical properties of the asphalt modifiers. Even though the present study focuses on the application of hot-mix asphalt (HMA), there are other methods, for instance, warm-mix asphalt (WMA), reclaimed asphalt pavement (RAP), and porous asphalt, that used CR as a modifier or as an additive in asphalt binders. A review of the literature suggests that most CR have a good performance and are suitable for use in the top paving layer to reduce noise as well as for other applications. Keywords End-of-life tires (ELTs) · Waste tire · Rubber recycling · Used tire management · Asphalt modifier · Crumb rubber
Introduction The use of crumb rubber (CR) to reinforce asphalt pavements is seen as a smart solution for sustainable development, since it involves the reuse of industrial waste materials. Additionally, CR can be used as an alternative polymer material to improve the performance of hot-mix asphalt (HMA) [1]. The properties of traditional asphalt binder have to be improved to enhance their resistance to permanent deformation (rutting) and cracking. The mechanical * Abdalrhman Milad [email protected] 1
Department of Civil Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Selangor, Malaysia
2
Department of Civil and Structural Engineering, Higher Institute of Science and Technology Aljufra (HIST), Sokna, Libya
3
Department of Building and Construction Engineering, Universiti Tun Hussein Onn Malaysia, Johor, Malaysia
properties of conventional asphalt binder can be improved through modification with appropriate materials [2]. Some of the earlier research focused on investigating the feasibility of using different types of synthetic polymers in an attempt to improve pavement resistance when exposed to varying temperature intervals [2]. Modification of binders with natural materials or polymers, including CR, is able to enhance the properties of asphalt mixtures a
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