生物油基再生剂对老化沥青流变性能恢复规律研究

doi:10.11896/cldb.24110036

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Abstract Considering the wide availability yet inconsistent performance of bio-oils, along with the unclear mechanisms by which different bio-oils inf-luence the rheological properties of aged asphalt, utilized castor oil (CO), gutter oil (GO), and soybean oil (SO) as base components for bio-oil-based rejuvenators. By incorporating plasticizers, penetrants, and wetting agents, tailored rejuvenators were developed. A comparative analysis was conducted to investigate the recovery behavior and underlying mechanisms of rheological properties in rejuvenated asphalt at optimal dosages. The results indicate that the infrared spectral characteristic peaks of the three rejuvenators are largely consistent. The aromatic content in the gutter oil-based rejuvenator (GOR) is higher than that in the castor oil-based rejuvenator (COR) and soybean oil-based rejuvenator (SOR), while the ester and phenol contents in GOR are lower than those in COR and SOR. The rejuvenator and asphalt show physical blending without chemical reactions occurring in the rejuvenated asphalt. The temperature and frequency sensitivities of gutter oil-based rejuvenated asphalt (GORA) are higher than those of castor oil-based rejuvenated asphalt (CORA) and soybean oil-based rejuvenated asphalt (SORA), while SORA demonstrates superior low-temperature performance compared to CORA and GORA. The complex modulus of the rejuvenated asphalt remains higher than that of the virgin asphalt, and the phase angle is lower than that of the virgin asphalt. The compatibility of SOR with aged asphalt is inferior to that of COR and GOR. The creep stiffness modulus (S) of the aged asphalt decreases, while the creep rate (m) increases with the addition of rejuvenators, thereby effectively enhancing the flexible deformation capacity of the aged asphalt. The low-temperature conti-nuous grading temperatures of the three rejuvenated asphalts are higher than that of the virgin asphalt, with CORA exhibiting a higher low-tempe-rature continuous grading temperature than GORA and SORA. Overall, COR and GOR demonstrate better rejuvenation effects compared to SOR.

Key words： asphalt bio-oil rejuvenator rheological property microscopic property

Published: 25 November 2025 Online: 2025-11-14

CLC number:

U414

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	Articles by authors
	ZHANG Wanguo
	WAN Guiwen
	QIAO Yuanhui
	ZHANG Jizhe
	XIONG Yuanshun

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ZHANG Wanguo,WAN Guiwen,QIAO Yuanhui, et al. Study on the Recovery Law of Rheological Properties of Aged Asphalt with Bio-Oil-based Recycling Agents[J]. Materials Reports, 2025, 39(22): 24110036-8.

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https://www.mater-rep.com/EN/10.11896/cldb.24110036 OR https://www.mater-rep.com/EN/Y2025/V39/I22/24110036

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