Development of an environmentally friendly composite rejuvenator for SBS-modified asphalt binder

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

Construction and Building Materials Pub Date : 2025-03-10 DOI:10.1016/j.conbuildmat.2025.140445

Ziwan Xie , Liyan Shan , Hu Yang , Shuang Liu , Chao Sun , Honghai Cui

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引用次数: 0

Abstract

To recycle the substantial amounts of waste Styrene-Butadiene-Styrene (SBS)-modified asphalt mixtures generated from highway reconstruction and expansion projects, this study developed an efficient and environmentally friendly novel composite rejuvenator using aromatic oil (AO) and 2,2′-(1,3-phenylene)-bis-oxazoline (PBO) as raw materials. To clarify the rejuvenation mechanism, the research delved into the interactions between aged SBS and PBO through detailed analyses using Fourier transform infrared spectroscopy and fluorescence microscopy. It was found that PBO can undergo amidation reactions with the carboxyl groups in aged SBS, thereby linking the SBS molecules. Furthermore, results from fluorescence microscopy and master curves analysis indicated that the rejuvenation effectiveness of SBS is also influenced by the proportion of the component rejuvenator AO. Adequate AO is not only essential for softening the base asphalt binder but also necessary for enabling the rejuvenated SBS to sufficiently absorb light fractions and undergo swelling and development. The study also critically assessed the road performance of the rejuvenated SBS-modified asphalt binder. Overall, by employing the composite rejuvenator for aging SBS-modified asphalt binder, significant improvements were achieved in both high-temperature and low-temperature properties of the rejuvenated SBS-modified asphalt binder.

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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.