生物油、SBS与胶粉粒径比改性沥青性能研究

Study on the Performance of Asphalt Modified with Bio-Oil, SBS and the Crumb Rubber Particle Size Ratio.

作者信息

Guo Fengqi, Shen Zhaolong, Jiang Liqiang, Long Qiuliang, Yu Yujie

机构信息

School of Civil Engineering, Central South University, Changsha 410075, China.

National Engineering Research Center of High-Speed Railway Construction Technology, Central South University, Changsha 410083, China.

出版信息

Polymers (Basel). 2024 Jul 6;16(13):1929. doi: 10.3390/polym16131929.

DOI:10.3390/polym16131929

PMID:39000784

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11244560/

Abstract

To enhance the properties of SBS and crumb rubber-modified asphalts, four different amounts (5%, 10%, 15%, and 20%) of castor oil were added to crumb rubber-modified asphalts to mitigate the adverse effects of high levels of fine crumb rubber particles on the aging resistance of SBS and crumb rubber-modified asphalt. Initially, a conventional test was conducted to assess the preliminary effects of bio-oil on the high-temperature and anti-aging properties of SBS and crumb rubber-modified asphalt. Subsequently, dynamic shear rheometer and bending beam rheometer tests were employed to evaluate the impact of bio-oil on the high- and low-temperature and anti-fatigue properties of SBS and crumb rubber-modified asphalt. Finally, fluorescence microscopy and Fourier transform infrared spectroscopy were used to examine the micro-dispersion state of the modifier and functional groups in bio-oil, SBS and crumb rubber composite-modified asphalts. The experimental results indicated that bio-oil increased the penetration of SBS and crumb rubber-modified asphalt, decreased the softening point and viscosity, and significantly improved its aging resistance. The addition of bio-oil enhanced the anti-fatigue properties of SBS and crumb rubber-modified asphalt. The optimal amount of added bio-oil was identified. Bio-oil also positively influenced the low-temperature properties of SBS and crumb rubber-modified asphalt. Although the addition of bio-oil had some adverse effects on the asphalt's high-temperature properties, the asphalt mixture modified with bio-oil, SBS, and crumb rubber still exhibited superior high-temperature properties compared to unmodified asphalt. Furthermore, fluorescence microscopy and Fourier transform infrared spectroscopy results demonstrated that bio-oil can be uniformly dispersed in asphalt, forming a more uniform cross-linked structure and thereby enhancing the aging resistance of SBS and crumb rubber-modified asphalt. The modification process involved the physical blending of bio-oil, SBS, and crumb rubber within the asphalt. Comprehensive research confirmed that the addition of bio-oil has a significant and positive role in enhancing the properties of SBS and crumb rubber-modified asphalt with different composite crumb rubber particle size ratios.

摘要

为提高SBS和胶粉改性沥青的性能，向胶粉改性沥青中添加了四种不同用量（5%、10%、15%和20%）的蓖麻油，以减轻大量细胶粉颗粒对SBS和胶粉改性沥青抗老化性能的不利影响。首先，进行了常规试验，以评估生物油对SBS和胶粉改性沥青高温和抗老化性能的初步影响。随后，采用动态剪切流变仪和弯曲梁流变仪试验，评估生物油对SBS和胶粉改性沥青高温、低温和抗疲劳性能的影响。最后，利用荧光显微镜和傅里叶变换红外光谱，研究生物油、SBS和胶粉复合改性沥青中改性剂的微观分散状态和官能团。实验结果表明，生物油提高了SBS和胶粉改性沥青的针入度，降低了软化点和粘度，并显著提高了其抗老化性能。生物油的添加增强了SBS和胶粉改性沥青的抗疲劳性能。确定了生物油的最佳添加量。生物油对SBS和胶粉改性沥青的低温性能也有积极影响。虽然生物油的添加对沥青的高温性能有一些不利影响，但与未改性沥青相比，用生物油、SBS和胶粉改性的沥青混合料仍具有优异的高温性能。此外，荧光显微镜和傅里叶变换红外光谱结果表明，生物油可以均匀地分散在沥青中，形成更均匀的交联结构，从而提高SBS和胶粉改性沥青的抗老化性能。改性过程涉及生物油、SBS和胶粉在沥青中的物理共混。综合研究证实，添加生物油对提高不同复合胶粉粒径比的SBS和胶粉改性沥青性能具有显著的积极作用。