Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 1999-2017 |
| Number of pages | 19 |
| Journal | Road Materials and Pavement Design |
| Volume | 23 |
| Issue number | 9 |
| Early online date | 1 Jul 2021 |
| DOIs | |
| Publication status | Published - 2 Sept 2022 |
Keywords
- MSCR
- Nano silica
- rheological properties
- rubber modified bitumen
- rutting resistance
- tyre pyrolysis oil
ASJC Scopus subject areas
- Civil and Structural Engineering
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