School of Civil and Architectural Engineering, Shandong University of Technology, Zibo, Shandong, China.
School of Civil Engineering and Architecture, Hubei University of Arts and Science, Xiangyang, Hubei, China.
PLoS One. 2020 Sep 4;15(9):e0238817. doi: 10.1371/journal.pone.0238817. eCollection 2020.
Bio-asphalt binders have been proposed as replacements for traditional asphalt binders, owing to advantages such as environmental protection, low costs, and abundant resources. However, a limitation of bio-asphalt binders is that their high-temperature performance is not suitable for pavement construction. In recent years, nano-particles have been widely used to improve the pavement performance of asphalt binders, particularly the high-temperature performance. Thus, the nano-particles might also provide a positive modified effect on the high-temperature performance of bio-asphalt binders. Based on this, five types of nano-particles including SiO2, CaCO3, TiO2, Fe2O3, and ZnO are selected for the preparation of modified bio-asphalt binders, using different dosages of nano-particles and bio-oil. The high- and low-temperature performances, aging resistance, workable performance, and water stability of the nano-modified bio-asphalt binders and mixtures are investigated. The results reveal that, the high-temperature performance and aging resistance of the nano-modified bio-asphalt binders and mixtures are improved at increased nano-particle dosages, whereas their low-temperature performance is slightly weakened. The effects of the nano-particles on the workable performance and water stability are insignificant.
生物沥青粘合剂由于环保、低成本和资源丰富等优点，已被提议替代传统的沥青粘合剂。然而，生物沥青粘合剂的一个局限性是其高温性能不适用于路面建设。近年来，纳米颗粒已被广泛用于改善沥青粘合剂的路面性能，特别是高温性能。因此，纳米颗粒也可能对生物沥青粘合剂的高温性能产生积极的改性效果。基于此，选择了五种纳米颗粒（SiO2、CaCO3、TiO2、Fe2O3 和 ZnO），使用不同剂量的纳米颗粒和生物油来制备改性生物沥青粘合剂。研究了纳米改性生物沥青粘合剂及其混合料的高温和低温性能、耐老化性能、工作性能和水稳定性。结果表明，随着纳米颗粒用量的增加，纳米改性生物沥青粘合剂及其混合料的高温性能和耐老化性能得到提高，而低温性能略有减弱。纳米颗粒对工作性能和水稳定性的影响不显著。
