Rohayzi Nurul Farhana, Katman Herda Yati Binti, Ibrahim Mohd Rasdan, Norhisham Shuhairy, Rahman Noorhazlinda Abd
Department of Civil Engineering, College of Engineering, Universiti Tenaga Nasional, Putrajaya Campus, Jalan Ikram-Uniten, Kajang 43000, Malaysia.
Institute of Energy Infrastructure, Universiti Tenaga Nasional, Putrajaya Campus, Jalan Ikram-Uniten, Kajang 43000, Malaysia.
Polymers (Basel). 2023 Apr 20;15(8):1951. doi: 10.3390/polym15081951.
Conventional bitumen pavement is no longer suitable for handling increasing loads and weather variations, which cause road deterioration, Thus, the modification of bitumen has been suggested to counter this issue. This study provides a detailed assessment of various additives for modifying natural rubber-modified bitumen used in road construction. This work will focus on the use of additives with cup lump natural rubber (CLNR), which has recently started to gain attention among researchers, especially in rubber-producing countries such as Malaysia, Thailand and Indonesia. Furthermore, this paper aims to briefly review how the addition of additives or modifiers helps elevate the performance of bitumen by highlighting the significant properties of modified bitumen after the addition of modifiers. Moreover, the amount and method of application of each additive are discussed further to obtain the optimum value for future implementation. On the basis of past studies, this paper will review the utilisation of several types of additives, including polyphosphoric acid, Evotherm, mangosteen powder, trimethyl-quinoline and sulphur, and the application of xylene and toluene to ensure the homogeneity of the rubberised bitumen. Numerous studies were conducted to verify the performance of various types and compositions of additives, particularly in terms of physical and rheological properties. In general, additives enhance the properties of conventional bitumen. Future research should investigate CLNR because studies on its utilisation are limited.
传统的沥青路面已不再适合应对不断增加的交通负荷和天气变化，这些因素会导致路面损坏，因此，有人建议对沥青进行改性以解决这一问题。本研究对用于道路建设的天然橡胶改性沥青的各种添加剂进行了详细评估。这项工作将重点关注与块状天然橡胶（CLNR）一起使用添加剂的情况，CLNR最近开始受到研究人员的关注，尤其是在马来西亚、泰国和印度尼西亚等橡胶生产国。此外，本文旨在通过强调添加改性剂后改性沥青的重要性能，简要回顾添加剂或改性剂的添加如何有助于提高沥青的性能。此外，还将进一步讨论每种添加剂的用量和应用方法，以获得未来实施的最佳值。基于以往的研究，本文将回顾几种添加剂的使用情况，包括多聚磷酸、Evotherm、山竹果粉、三甲基喹啉和硫磺，以及二甲苯和甲苯的应用，以确保橡胶沥青的均匀性。进行了大量研究以验证各种类型和组成的添加剂的性能，特别是在物理和流变性能方面。一般来说，添加剂可增强传统沥青的性能。未来的研究应该调查CLNR，因为关于其使用的研究有限。
