Rejuvenation performance and mechanism of aged SBS modified asphalt rejuvenated by bio-oil based rejuvenators

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials Pub Date : 2024-11-29 DOI:10.1016/j.conbuildmat.2024.139366

Jiaomin Huo , Xiao Zhang , Fang Liu , Yufeng Liu , Yanfeng Niu , Hengji Zhang , Pengyuan Liu

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引用次数: 0

Abstract

To further understand the performance and mechanism of bio-oil based rejuvenators during hot recycling with high-content reclaimed styrene-butadiene-styrene (SBS) modified asphalt pavement (RAP-SBS), three kinds of bio-oil based rejuvenators (R1: waste edible oil (WEO), R2: WEO and SBS compound, R3: WEO and reactive agent compound) with different dosages (4 %, 8 %, and 12 %) were used to prepare rejuvenated SBS modified asphalt in this study. Dynamic shear rheometer (DSR) and bending beam rheometer (BBR) were used to study the rheological performances at high, medium, and low temperatures. Fluorescence microscopy (FM) and Fourier transform infrared (FT-IR) spectroscopy were utilized to reveal the rejuvenation mechanisms. The results show that R1 mitigates the agglomeration of aged SBS, and its rejuvenated asphalts have inferior permanent deformation resistance and superior elastic recovery ability but insufficient stress relaxation at extremely low temperatures. R2 can supplement the SBS phase while the ability to repair the network structure is limited, and the permanent deformation resistance of its rejuvenated asphalts is the best. R3 can effectively restore the network structure through chemical reactions. Its rejuvenated asphalts exhibit the best resistance to fatigue cracking. Also, they can significantly improve the speed of viscoelastic flow to release shrinkage stress at low temperatures. Based on the rheological performances of rejuvenated asphalts, utilizing the Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) analysis, the recommended dosages are R2 at 12 %, and R3 at 8 %.

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来源期刊

Construction and Building Materials 工程技术-材料科学：综合

CiteScore

13.80

自引率

21.60%

发文量

3632

审稿时长

82 days

期刊介绍： Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged. Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.