全程老化沥青中温抗疲劳性能及预测模型研究

doi:10.11896/cldb.23070147

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Abstract In order to analyze the medium temperature fatigue resistance of aged asphalt binders, three matrix asphalts and two modified asphalts were used as test materials, based on linear amplitude scanning tests and viscoelastic continuum damage models, a prediction model was created. The findings demonstrate that in the linear amplitude scanning test, the asphalt's composite shear modulus increases with frequency and aging time while the phase angle decreases; the phase angle of the modified asphalt is significantly smaller than that of the matrix asphalt, demonstrating that the modifier can increase the elasticity of the asphalt binder; the fatigue life of the matrix asphalt decreases with the increase of aging time, and there is a gentle transition period for its change. The accuracy test results reveal that the residual fatigue life is advised as an indicator of the medium temperature fatigue resistance of ageing asphalt binders, and the corresponding technical requirements are proposed for various types of asphalt. The results of the accuracy tests demonstrate that the non-linear prediction model is a good fit and can be used to predict the fatigue life of asphalt binders at different aging times.

Key words： road engineering asphalt binder medium temperature fatigue resistance linear amplitude sweep test viscoelastic continuous damage model

Published: 10 November 2024 Online: 2024-11-11

CLC number:

U414

Fund:National Natural Science Foundation of China (52278431, 51608048), Transportation Science and Technology Project of Fujian Province (202236).

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	Articles by authors
	LIU Yamin
	HAN Xuhui
	GAO Chenguang
	ZHONG Guoliang

Cite this article:

LIU Yamin,HAN Xuhui,GAO Chenguang, et al. Study on Fatigue Resistance and Prediction Model of Whole Process Aged Asphalt at Medium Temperature[J]. Materials Reports, 2024, 38(21): 23070147-6.

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http://www.mater-rep.com/EN/10.11896/cldb.23070147 OR http://www.mater-rep.com/EN/Y2024/V38/I21/23070147

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