Research on the Properties of Nano-Al2O3- and Nano-SiO2-Modified Bio-Asphalt and Mixtures
Auteur(s): |
Wei Qiao
Feilong Yuan Xiaojian Xu Qingzhou Wang |
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Médium: | article de revue |
Langue(s): | anglais |
Publié dans: | Buildings, 22 octobre 2024, n. 11, v. 14 |
Page(s): | 3366 |
DOI: | 10.3390/buildings14113366 |
Abstrait: |
Bio-oil as a substitute or modifier for petroleum asphalt has significant environmental, economic, and sustainable development implications. However, the insufficient high-temperature and anti-aging characteristics of bio-asphalt lead to the limited application of bio-oil in road engineering. In this study, the characteristics of bio-asphalt were reinforced by nano-Al₂O₃ and nano-SiO₂. The nanomaterial-modified bio-asphalt was evaluated using basic characteristics, viscosity, and high- and low-temperature rheological characteristic tests. Meanwhile, the road behavior of nanomaterial-modified bio-asphalt mixtures was assessed. The test results demonstrated that incorporating bio-oil improved the low-temperature performance of PA. Compared with PA, BA’s ductility was increased by 83.87%. Nano-Al₂O₃ and nano-SiO₂ positively affected the bio-asphalt’s temperature sensitivity and high-temperature and anti-aging characteristics but inhibited the low-temperature characteristics. Combining the results of the high- and low-temperature characteristics of nanomaterial-modified bio-asphalt, a nano-Al₂O₃ dosage between 4 and 6% or a nano-SiO₂ dosage between 6 and 8% can realize the enhancement of high-temperature and anti-aging characteristics of bio-asphalt, and the low-temperature characteristics are better than those of petroleum asphalt. Meanwhile, the dynamic stability, crack resistance, and water loss resistance of the nanomaterial-modified bio-asphalt mixtures meet the specification requirements. The adjustable and designable high- and low-temperature characteristics of bio-asphalt can be realized by adjusting the dosage of nanomaterials. The application of bio-oil and nanomaterials promotes the resourceful utilization of waste and provides new possibilities for road engineering materials. |
Copyright: | © 2024 by the authors; licensee MDPI, Basel, Switzerland. |
License: | Cette oeuvre a été publiée sous la license Creative Commons Attribution 4.0 (CC-BY 4.0). Il est autorisé de partager et adapter l'oeuvre tant que l'auteur est crédité et la license est indiquée (avec le lien ci-dessus). Vous devez aussi indiquer si des changements on été fait vis-à-vis de l'original. |
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10804749 - Publié(e) le:
10.11.2024 - Modifié(e) le:
25.01.2025