紫外老化对硫酸钙晶须改性沥青疲劳性能的影响

doi:10.11896/cldb.24040015

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Abstract Asphalt is susceptible to aging when exposed to ultraviolet radiation, leading to a reduction in fatigue resistance and service life of the pavement. To investigate the fatigue resistance and modification mechanism of calcium sulfate whiskers (CSW) modified asphalt under ultraviolet aging conditions, UV aging tests were conducted on matrix asphalt and three types of modified asphalt with varying contents (5%, 10%, 15%) of CSW. Fatigue parameters such as shear stress and shear strain were measured using linear amplitude scanning test. The fatigue life of UV aged asphalt was calculated based on the viscoelastic continuum damage model (VECD). The chemical composition and phase structure of UV aged asphalt were analyzed using FTIR and SEM tests. The results indicated that the proportion of viscoelastic components decreases due to UV aging. The addition of 5% CSW improves the fatigue resistance and extends life of asphalt under UV conditions. Furthermore, under identical UV aging conditions, the fatigue life of asphalt is influenced by the CSW content; higher CSW content leads to a lower fatigue life, with the optimal range being 5% to 10%. Physical adsorption between CSW and asphalt forms a network structure, enhancing the asphalt’s resistance to UV aging.

Key words： CSW modified asphalt ultraviolet aging fatigue property damage model microscopic mechanism

Published: Online: 2025-05-29

CLC number:

U416.217

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	Articles by authors
	FAN Taotao
	HAN Songkai
	SI Chundi

Cite this article:

FAN Taotao,HAN Songkai,SI Chundi. Effect of Ultraviolet Aging on Fatigue Properties of Calcium Sulfate Whisker Modified Asphalt[J]. Materials Reports, 2025, 39(11): 24040015-6.

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https://www.mater-rep.com/EN/10.11896/cldb.24040015 OR https://www.mater-rep.com/EN/Y2025/V39/I11/24040015

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