微波加热对石油沥青的化学、流变及工程特性的影响

doi:10.11896/cldb.23120216

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Abstract 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 softe-ning 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.

Key words： road engineering petroleum asphalt microwave heating chemical rheological engineering property

Published: 25 December 2024 Online: 2024-12-20

CLC number:

U416

Fund:National Natural Science Foundation of China (52278449), Transportation Science and Technology Project of Heilongjiang DOT (HJK2023B014-3), Transportation Science and Technology Project of Heilongjiang DOT (20210027).

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	Articles by authors
	WANG Liming
	SUN Yongzuo
	PANG Hong
	XU Jixin
	DONG Mingzhe

Cite this article:

WANG Liming,SUN Yongzuo,PANG Hong, et al. Effect of Microwave Heating on Chemical, Rheological and Engineering Properties of Petroleum Asphalt[J]. Materials Reports, 2024, 38(24): 23120216-8.

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http://www.mater-rep.com/EN/10.11896/cldb.23120216 OR http://www.mater-rep.com/EN/Y2024/V38/I24/23120216

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