复杂气候条件下胶粉改性沥青的低温性能

doi:10.11896/j.issn.1005-023X.2018.12.026

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Abstract In northern China, the summer is hot and winter is cold. Asphalt pavement is prone to thermal aging easily at high temperature, and suffers freeze-thaw cycles at low temperature, which will affect the performance of asphalt. The short-term and long-term thermal aging test and freeze-thaw cycle test were carried out in this work upon the matrix asphalt and crumb-rubber-modified asphalt to simulate environmental impact, and subsequently the bending beam rheometer was employed to measure the asphalts’ bending creep stiffness S and creep rates m. We analyzed the changes of low temperature performances of these two kinds of asphalts which had experienced different salt freezing cycle times and different thermal aging modes, and moreover, observed their microstructure variations by an atomic force microscope (AFM). It can be concluded that thermal aging exerts serious influences on the low temperature anti-cracking performances and anti-deformation performances of both the matrix asphalt and rubber-modified asphalt. Therefore, it is of great importance to prevent and control thermal aging of asphalt pavement in seasonal frozen are in order to ensure the road service life. Compared with matrix asphalt, the crumb-rubber-modified asphalt exhibited a relatively better low temperature performance, including flexibility and deformation resistance, after salt freezing cycles and thermal aging, and displayed a more favorable compatibility in northern cold regions.

Key words： salt freezing cycle thermal aging rubber modified asphalt low temperature rheological property atomic force microscopy

Published: 20 July 2018

CLC number:	TB332
	U214.7+5

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	Articles by authors
	CUI Yanan
	YU Qingnian
	HAN Jiwei
	CHEN Chao

Cite this article:

CUI Yanan,YU Qingnian,HAN Jiwei, et al. Low Temperature Performance of Rubber-modified Asphalt Under Complex Climate[J]. Materials Reports, 2018, 32(12): 2078-2084.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.12.026 OR http://www.mater-rep.com/EN/Y2018/V32/I12/2078

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