基于吸附沥青膜厚度的沥青与矿粉交互作用能力评价研究

doi:10.11896/cldb.22010049

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Abstract The road performance of asphalt mastic is determined by the interaction ability of asphalt and filler. In order to accurately evaluate the physicochemical interaction between asphaltand filler, the asphalt-filler interaction mechanisms was analyzed. The interfacial adsorbed film thickness was used as the evaluation index of the asphalt-filler interaction in this study. New calculation methods of interfacial adsorbed film thickness were proposed based on Hashin model, Mori-Tanaka model and the generalized self-consistent model, and then the effects of filler acidity, test temperature and frequency on adsorbed film thickness were also investigated. The results show that the interaction between asphalt and filler can be more accurately evaluated by the interfacial adsorbed film thickness calculated based on Hashin model. The higher the content of acidic SiO₂ in the filler, the weaker the interaction ability between the asphalt and filler. The influence of test frequency on interaction ability of asphalt and filler is opposite when the temperature is higher or lower than the softening point. The interaction ability of limestone filler and asphalt increases with the increase of temperature. The surface of fly ash particles is pyknotic CaO-SiO₂-Al₂O₃ system, which makes the temperature have little effect on its interaction with asphalt. The large amount of SiO₂ contained in coal waste filler inhibits its interaction with asphalt.

Key words： road engineering asphalt mastic interaction ability interfacial adsorbed film thickness micromechanics

Published: 10 September 2023 Online: 2023-09-05

CLC number:

TU414

Fund:National Natural Science Foundation of China(51308084), the China Postdoctoral Science Foundation(2020M670731), the Fundamental Research Funds for the Central Universities(3132017029), ‘Double Tops’ Construction Special Project of Dalian Maritime University(BSCXXM021), and the Science Foundation of Dalian, China (2020JJ26SN062).

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	Articles by authors
	GUO Naisheng
	YU Ankang
	WANG Zhichen
	FANG Chenze

Cite this article:

GUO Naisheng,YU Ankang,WANG Zhichen, et al. Study on Interaction Ability of Asphalt and Filler Based on Interfacial Adsorbed Film Thickness[J]. Materials Reports, 2023, 37(17): 22010049-8.

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http://www.mater-rep.com/EN/10.11896/cldb.22010049 OR http://www.mater-rep.com/EN/Y2023/V37/I17/22010049

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