ABSTRACT

This study seeks to examine the physical and high-temperature rheological performance of crude palm oil (CPO)/tire pyrolysis oil (TPO) composite asphalt to develop a more sustainable bio-rubberized asphalt (BRA) binder. The study uses the penetration, softening point, and dynamic viscosity tests to evaluate binder consistency and dynamic shear rheometer (DSR) tests to determine the linear viscoelastic properties before and after short-term aging. The nonlinear viscoelastic properties of modified asphalt were determined using the multiple stress creep recovery (MSCR) test. Results showed that the substitution of 20% asphalt with tire pyrolysis oil-modified bio-asphalt retained or enhanced the asphalt grade performance at high temperatures. All BRA binders have a higher aging resistance than the base asphalt. The MSCR results showed that, relative to all tested binders, the BRA binder containing 5% CPO and 5% TPO has optimal non-recoverable creep compliance (J_nr) and percentage of recovery (%R) with a performance close to PG64H compared to the PG64S performance grade of the base asphalt. Overall, the findings of this study indicate that the incorporation of CPO/TPO in asphalt is suitable for producing bio-rubberized asphalt containing 20% recycled waste rubber and bio-oil and improves the high-temperature properties of asphalt to a certain extent.

摘要

本研究旨在检验粗棕榈油 (CPO)/轮胎裂解油 (TPO) 复合沥青的物理和高温流变性能，以开发更可持续的生物橡胶沥青 (BRA) 粘合剂。该研究使用渗透、软化点和动态粘度测试来评估粘合剂的稠度，并使用动态剪切流变仪 (DSR) 测试来确定短期老化前后的线性粘弹性能。改性沥青的非线性粘弹性特性采用多重应力蠕变恢复 (MSCR) 试验确定。结果表明，用轮胎热解油改性的生物沥青替代20%的沥青保留或提高了高温下的沥青等级性能。所有 BRA 粘合剂都比基础沥青具有更高的抗老化性。MSCR 结果表明，_nr ) 和回收率 (%R) 与基层沥青的 PG64S 性能等级相比性能接近 PG64H。总体而言，本研究结果表明，在沥青中掺入CPO/TPO适合生产含有20%再生废橡胶和生物油的生物橡胶沥青，并在一定程度上改善了沥青的高温性能。