Al-Mansob Ramez A, Katman Herda Yati, Al-Sabaeei Abdulnaser M, Zamzami Muhammad, Al-Fakih Amin, Wei Willy Kuay, Jassam Taha M, Alsharef Jamal, Surol Salihah B, Yusof Nurul H, Koting Suhana
Department of Civil Engineering, UCSI University, Cheras 56000, Malaysia.
Department of Civil Engineering, International Islamic University Malaysia, Jalan Gombak 50728, Selangor, Malaysia.
Materials (Basel). 2022 May 29;15(11):3870. doi: 10.3390/ma15113870.
This study aimed to evaluate the effects of carbon nanofibers (CNFs) on the performance of liquid epoxidized natural rubber (LENR)-modified asphalt. The physical, adhesion and rheological properties were determined by several tests such as penetration, elastic recovery, ring and ball softening point, Brookfield rotational viscometer, AFM and dynamic shear rheometer. LENR was used at concentrations of 3, 6, and 9%, while CNFs were used at contents of 0.3, 0.4, and 0.5% by weight of asphalt. Conventional test results showed that the increases in LENR and LENR/CNFs composite contents in binder leads to an increase in the hardness and consistency and a reduction in the temperature susceptibility of base asphalt. Adhesion results revealed that the addition of CNFs significantly increases the adhesion and bonding properties of base and rubberized binders. Rheological properties analysis exhibited that LENR improved the viscoelastic properties and permanent deformation resistance of asphalt at different temperatures and frequencies. On the other hand, it was found that the addition of CNFs significantly improves the stiffness, elasticity, and hardness of LENR-modified binders. The 6% LENR and 0.4% CNFs were found to be the optimum to enhance the physical, adhesion, and rheological properties of asphalt in this study. Thus, it can be stated that the addition of CNFs is promising to improve the performance of rubberized binders for high temperature applications.
本研究旨在评估碳纳米纤维（CNFs）对液体环氧化天然橡胶（LENR）改性沥青性能的影响。通过针入度、弹性恢复、环球软化点、布氏旋转粘度计、原子力显微镜和动态剪切流变仪等多项测试来测定其物理、粘附和流变性能。LENR的使用浓度为3%、6%和9%，而CNFs的使用量为沥青重量的0.3%、0.4%和0.5%。常规测试结果表明，粘合剂中LENR和LENR/CNFs复合材料含量的增加会导致基础沥青的硬度和稠度增加，温度敏感性降低。粘附结果显示，添加CNFs显著提高了基础粘合剂和橡胶改性粘合剂的粘附和粘结性能。流变性能分析表明，LENR改善了沥青在不同温度和频率下的粘弹性性能和抗永久变形能力。另一方面，发现添加CNFs显著提高了LENR改性粘合剂的刚度、弹性和硬度。在本研究中，发现6%的LENR和0.4%的CNFs是增强沥青物理、粘附和流变性能的最佳组合。因此，可以说添加CNFs有望改善橡胶改性粘合剂在高温应用中的性能。
