Blab Ronald, Ahmad Juraidah, Shaffie Ekarizan, Sidek Norbaya, Mirwald Johannes, Eberhardsteiner Lukas, Hofko Bernhard
Institute of Transportation, Faculty of Civil and Environmental Engineering, TU Wien, Karlsplatz 13/E230, 1040 Vienna, Austria.
School of Civil Engineering, College of Engineering, Universiti Teknologi MARA, Shah Alam 40450, Selangor, Malaysia.
Materials (Basel). 2024 Nov 26;17(23):5800. doi: 10.3390/ma17235800.
Researchers are increasingly concerned about the vast amounts of waste rubber tires produced globally, which contribute significantly to environmental pollution. The potential of incorporating waste rubber tires to modify bitumen has garnered considerable interest. This study assesses pavement design temperatures according to SUPERPAVE standards for representative Malaysian regions. The assessment is based on hourly air temperature data and simulates temperature diffusion in typical Malaysian road pavements using the finite difference method (FDM). Tests on neat bitumen (PEN 60/70) and crumb rubber-modified bitumen (CR-TMB) samples evaluated their physical and rheological properties across various temperatures and aging stages. These tests were conducted using the dynamic shear rheometer, rotational viscometer, and bending beam rheometer. The attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) analysis provided insights into the aging processes of both PEN 60/70 and CR-TMB. The findings indicate that adding 15% crumb rubber to produce CR-TMB enhances the physical and rheological properties of bitumen. Additionally, this modification significantly improves aging behavior, highlighting its potential for more resilient and sustainable road construction materials. Therefore, the use of crumb rubber in road construction should be considered to improve pavement durability and strength. Furthermore, utilizing crumb rubber as an alternative material can reduce costs by recycling waste materials.
研究人员越来越关注全球产生的大量废旧橡胶轮胎，这些轮胎对环境污染有重大影响。将废旧橡胶轮胎用于改性沥青的潜力已引起了相当大的关注。本研究根据SUPERPAVE标准对马来西亚代表性地区的路面设计温度进行评估。该评估基于每小时的气温数据，并使用有限差分法（FDM）模拟典型马来西亚道路路面的温度扩散。对纯沥青（PEN 60/70）和橡胶粉改性沥青（CR-TMB）样品进行测试，评估它们在不同温度和老化阶段的物理和流变性能。这些测试使用动态剪切流变仪、旋转粘度计和弯曲梁流变仪进行。衰减全反射傅里叶变换红外光谱（ATR-FTIR）分析提供了对PEN 60/70和CR-TMB老化过程的见解。研究结果表明，添加15%的橡胶粉制成CR-TMB可提高沥青的物理和流变性能。此外，这种改性显著改善了老化行为，突出了其在制造更具弹性和可持续性的道路建筑材料方面的潜力。因此，应考虑在道路建设中使用橡胶粉以提高路面的耐久性和强度。此外，将橡胶粉用作替代材料可以通过回收废料来降低成本。
