Open Access

ARTICLE

The Effect of Bio-Oil on High-Temperature Performance of Bio-Oil Recycled Asphalt Binders

by Hengcong Zhang^*, Jianmin Wu, Zhong Qin, Yin Luo

Key Laboratory Special Area Highway Engineering of Ministry of Education, Chang’an University, Xi’an, 710064, China

* Corresponding Author: Hengcong Zhang. Email:

(This article belongs to the Special Issue: Renewable and Biosourced Adhesives-2021)

Journal of Renewable Materials 2022, 10(4), 1025-1037. https://doi.org/10.32604/jrm.2022.017483

Received 13 May 2021; Accepted 18 June 2021; Issue published 02 November 2021

Abstract

Bio-oil recycled asphalt binders in road engineering can help solve the problem of oil shortage and reduce the environmental pollution and sustainability. This paper investigated the road performance of the aged asphalt binder by adding bio-oil so that the aged asphalt binder could be reused to reach purpose of reuse. The residual soybean oil was selected as rejuvenator and blended with aged asphalt binder at 0%, 2%, 4%, and 6%, respectively. The results showed that bio-oil increased the penetration of aged asphalt binder, the penetration of bio-oil recycled asphalt binder with a bio-oil content of 6% reached the standard of 70# matrix asphalt binder. The addition of bio-oil reduced the viscosity, mixing and compaction temperature of aged asphalt binder. As a common knowledge, bio-oil helps to increase the lightweight components of the aged asphalt binder, which diminishes the high-temperature rutting resistance of bio-oil recycled asphalt binders. The high-temperature deformation resistance of bio-oil recycled asphalt binders had not decreased linearly with the bio-oil dosage. Meanwhile, the high-temperature performance of the bio-oil recycled asphalt binder with a 6% bio-oil was superior to matrix asphalt binder. Bio-oil increased the light components of the aged asphalt binder, thus reducing the high-temperature rheological properties of bio-oil recycled asphalt binders as the bio-oil dosage increases. The above test results showed that the bio-oil could restore the aged asphalt binder to the initial level to reach the reuse target.

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