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.

除了为全球投资者提供新的投资机会外，在沥青路面上使用再生碎橡胶（CR）可能是迈向确保更可持续发展的未来的重要一步。沥青改性剂能够增强柔性路面的性能，并有助于确保更可持续的环境。由于CR的显着特性，已证明将报废轮胎（ELT）生产的CR用作沥青改性剂可以提高沥青在高温车辙和低温热裂方面的性能。本文介绍了先前研究的发现，包括ELT的研磨以获得碎屑橡胶，该工艺中使用的技术以及沥青改性剂的物理和机械性能。尽管本研究着重于热拌沥青（HMA）的应用，但还有其他方法，例如，将CR用作热拌沥青（WMA），再生沥青路面（RAP）和多孔沥青。改性剂或作为沥青粘合剂的添加剂。文献综述表明，大多数CR具有良好的性能，适用于顶层铺面以降低噪音以及其他应用。