Effects of USAT aging and UV aging on the low-temperature performance of asphalt

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

Construction and Building Materials Pub Date : 2025-03-31 DOI:10.1016/j.conbuildmat.2025.140940

Jiawei Huang , Weian Xuan , Xuanzhi Li , Haibo Ding , Wenqi Wang

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引用次数: 0

Abstract

In order to explore the low-temperature performance of asphalt in different aging modes, an Universal Simple Aging Test (USAT) was used to replace the conventional RTFO and PAV tests, and the rheological parameters obtained by 4 mm DSR test and the chemical functional group index obtained by infrared spectroscopy was used to analyze the asphalt samples after ultraviolet aging and long-term aging. The research findings indicate that after ultraviolet aging, the increments in the complex modulus and the decrements in the phase angle of rubber asphalt are both smaller than those after long-term aging. Moreover, the increments in the complex modulus and the decrements in the phase angle of the base asphalt after long-term aging are both greater than those of rubber asphalt. After long-term aging, the Tg of the base asphalt increased by 4.1 %, and that of the rubber asphalt increased by 2.4 %; after ultraviolet aging, the Tg of the rubber asphalt increased by 0.86 %. The temperature sensitivity near Tg is ranked as QP-USAT > QP + 8 % X-USAT > QP + 8 % X-UV > QP > QP + 8 % X-UV1 > QP + 8 % X. Analysis of the infrared spectral characteristic functional groups revealed that after long-term aging, the increase in I_C_O and I_S_O of the base asphalt was greater than that of the rubber asphalt; for the rubber asphalt, the increase in I_C_O and I_S_O after ultraviolet aging was less than that after long-term aging. In terms of the influence of aging methods on the low-temperature performance of asphalt, long-term aging is greater than UV aging. In terms of the anti-aging ability of asphalt, rubber asphalt is superior to base asphalt. The analysis of removing the surface layer of UV-aged asphalt shows that the rheological indicators and characteristic functional group indices of sample QP + 8 %X and sample QP + 8 %X1 are approximately the same. As the thickness of the removed asphalt is less than 1 mm, therefore, it is concluded that the influence depth of UV aging on rubber asphalt is less than 1 mm. The correlation analysis of the characteristic functional group indices (I_C_O, I_S_O) and low-temperature performance indicators (G*, m, Eg) of asphalt show that the correlation degree ranking of characteristic functional group indices with G*, m, and Eg is: I_S_O > I_C_O. The research results reveal the changes in low-temperature rheological properties and chemical composition of asphalt before and after aging under different aging modes, providing a new theoretical basis for the study of asphalt's low-temperature durability.

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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.