This study aimed to evaluate the effects of nano silica (NS) particles on the high-temperature rheological properties of tyre pyrolysis oil (TPO)-modified bitumen. Physical tests, short-term aging, temperature sweep test and multiple stress creep recovery (MSCR) test were conducted to evaluate the effects of NS on the high-temperature rheological performance. Results indicate that the inclusion of NS to TPO-modified bitumen displayed significant improvement in rutting resistance before and after aging. Meanwhile, MSCR results showed that the high-temperature performance grade of bitumen was upgraded from PG 64S in the case of base and TPO-modified bitumen to PG 64 V at 10% TPO and 4% NS. Statistical analysis also showed that the effects of NS particles on the rutting performance of TPO-modified bitumen are statistically significant within the confidence interval of 95%. These findings present a remarkable enhancement in the high-temperature performance of TPO-modified bitumen.

本研究旨在评估纳米二氧化硅 (NS) 颗粒对轮胎裂解油 (TPO) 改性沥青高温流变性能的影响。进行了物理测试、短期老化、温度扫描测试和多次应力蠕变恢复（MSCR）测试，以评估NS对高温流变性能的影响。结果表明，在 TPO 改性沥青中加入 NS 在老化前后的抗车辙性能显着提高。同时，MSCR 结果表明，沥青的高温性能等级从基础和 TPO 改性沥青的 PG 64S 升级到 10% TPO 和 4% NS 的 PG 64 V。统计分析还表明，NS 颗粒对 TPO 改性沥青车辙性能的影响在 95% 的置信区间内具有统计学意义。这些发现显着提高了 TPO 改性沥青的高温性能。