基于连续时间谱的沥青混合料黏弹性参数换算

doi:10.11896/cldb.22120218

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Abstract To enhance the accuracy of viscoelastic parameter conversions for asphalt mixtures while exploring the determination and conversion methods of continuous time spectra for these materials, an explicit calculation formula for continuous time spectra was derived using an improved Sigmoidal function. Additionally, a viscoelastic parameter conversion process for asphalt mixtures was proposed based on this approach, enabling frequency-domain viscoelastic parameters to be converted to time-domain viscoelastic parameters. To validate the accuracy of these conversions, complex modulus and creep compliance tests were conducted on Mix-9.5, Mix-19, and Mix-25 asphalt mixtures. Results indicate that the generation of non-performing spectra can be effectively mitigated through the use of the improved Sigmoidal function when calculating the continuous time spectra of asphalt mixtures. Furthermore, when taking a time point interval N=1, creep compliance converted based on continuous time spectra is closer to the experimental value than that converted based on discrete time spectra. Notably, the curves of relaxation and creep compliance parameters converted align with the characteristics of the viscoelastic parameter curves of asphalt mixtures, resulting in strong consistency regarding the conversion process.

Key words： road engineering asphalt mixture continuous time spectrum viscoelastic master curve

Published: Online: 2024-10-12

CLC number:

U414

Fund:This work was financially supported by the Heilongjiang Provincial Natural Science Foundation of China (YQ2022E038), National Natural Science Foundation of China (52278454), and Liaoning Provincial Department of Education Project (LJKZZ20220080,LJKM20220934).

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	Articles by authors
	WANG Zhichen
	SUN Yazhen
	GUO Naisheng

Cite this article:

WANG Zhichen,SUN Yazhen,GUO Naisheng. Conversion of Viscoelastic Parameters of Asphalt Mixture Based on Continuous Time Spectrum[J]. Materials Reports, 2024, 38(18): 22120218-6.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.22120218 OR http://www.mater-rep.com/EN/Y2024/V38/I18/22120218

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