Effect of Microwave Heating on Chemical, Rheological and Engineering Properties of Petroleum Asphalt

被引：0

作者：

Wang, Liming ^{[1
]}

Sun, Yongzuo ^{[1
]}

Pang, Hong ^{[1
]}

Xu, Jixin ^{[1
]}

Dong, Mingzhe ^{[1
]}

机构：

[1] School of Civil Engineering and Transportation, Northeast Forestry University, Harbin

来源：

Cailiao Daobao/Materials Reports | 2024年 / 38卷 / 24期

基金：

中国国家自然科学基金;

关键词：

chemical; engineering property; microwave heating; petroleum asphalt; rheological; road engineering;

D O I：

10.11896/cldb.23120216

中图分类号：

学科分类号：

摘要：

Microwave heating is efficient and energy-saving for asphalt pavement maintenance, however, the additional chemical effects of the microwave heating process on asphalt have not been paid attention to. In this work, chemical composition and structural changes of asphalt heated by microwave were analyzed by four-component analysis, infrared spectrum analysis, optical microscopic observation. The results showed that the typical heavy components of petroleum asphalt after 10 min microwave irradiation were significantly reduced, the asphaltene aggregates were homogenized and dispersed, and some saturated compounds were converted into unsaturated compounds. Further rheological and engineering characteristics analysis such as dynamic shear rheology, bending beam rheology, and aging of rotary film oven showed that, at a high temperature, the viscosity of asphalt heated by microwave decreases significantly, at a medium temperature, the asphalt slightly softened and its thixotropic limit increased, at a low temperature, creep ability of the asphalt decreased, and the coordination relationship between softening point and glass transition temperature changed abnormally, and the aging resistance decreased. The influence of microwave heating process on the physical and chemical properties of asphalt is significant and far-reaching, and it also provides the possibility of modification, regeneration, warm mix and other engineering applications for asphalt activation and viscosity reduction. © 2024 Cailiao Daobaoshe/ Materials Review. All rights reserved.

引用

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