Aging effects on rheological properties of high viscosity modified asphalt

IF 7.4 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Traffic and Transportation Engineering-English Edition Pub Date : 2023-04-01 DOI:10.1016/j.jtte.2021.03.008

Wei Jiang , Dongdong Yuan , Zheng Tong , Aimin Sha , Jingjing Xiao , Meng Jia , Wanli Ye , Wentong Wang

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引用次数: 2

Abstract

This work investigated the aging effects on the rheological properties of high viscosity modified asphalt (HVMA). First, the high- and low-temperature rheological properties were measured by a dynamic shear rheometer and a bending beam rheometer, respectively. The aging mechanism was then tested using an Fourier transform infrared spectroscopy and a scanning electron microscope. Besides, a study was performed to compare the aging effects on the rheological properties of HVMA, crumb rubber modified asphalt (CRMA), and neat asphalt (SK-90). The experimental results showed that the effects of the long-term aging on HVMA exceeded those of short-term aging. The complex shear modulus of the HVMA was improved by the aging in the whole frequency range. The complex shear modulus of the HVMA after the long-term aging was larger than after the short-term aging. Thus, the aging improved the high-temperature viscoelastic performance of HVMA. With a decrease in temperature from −12 °C to −24 °C, the low-temperature viscoelastic performance of HVMA decreased since its stiffness modulus and low continuous grading temperature increase. Both of the short- and long-term aging of HVMA were caused by an oxidation reaction, while modifier swelling also happened after long-term aging. Compared to CRMA and SK-90, aging had a limited influence on the high- and low-temperature rheological properties of HVMA.

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老化对高粘度改性沥青流变性能的影响

研究了老化对高粘度改性沥青流变性能的影响。首先，分别用动态剪切流变仪和弯曲梁流变仪测量了高温和低温流变性能。然后使用傅立叶变换红外光谱和扫描电子显微镜测试老化机制。此外，还比较了老化对HVMA、胶粉改性沥青（CRMA）和纯沥青（SK-90）流变性能的影响。实验结果表明，长期老化对HVMA的影响大于短期老化。HVMA的复剪切模量在整个频率范围内都得到了改善。HVMA的复合剪切模量在长期老化后大于短期老化后。因此，老化改善了HVMA的高温粘弹性性能。随着温度从−12°C降低到−24°C，HVMA的低温粘弹性性能下降，因为其刚度模量和低连续分级温度增加。HVMA的短期和长期老化都是由氧化反应引起的，而改性剂的溶胀也发生在长期老化之后。与CRMA和SK-90相比，老化对HVMA的高温和低温流变性能的影响有限。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Traffic and Transportation Engineering-English Edition TRANSPORTATION SCIENCE & TECHNOLOGY-

CiteScore

13.60

自引率

6.30%

发文量

402

审稿时长

15 weeks

期刊介绍： The Journal of Traffic and Transportation Engineering (English Edition) serves as a renowned academic platform facilitating the exchange and exploration of innovative ideas in the realm of transportation. Our journal aims to foster theoretical and experimental research in transportation and welcomes the submission of exceptional peer-reviewed papers on engineering, planning, management, and information technology. We are dedicated to expediting the peer review process and ensuring timely publication of top-notch research in this field.

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