Adhesion Mechanism of Geopolymer-Modified Emulsified Asphalt Slurry at Interface with Aggregate

Authors

ZHONG Chao, Faculty of Engineering , China University of Geosciences (Wuhan ), Wuhan , Hubei 430074 , ChinaFollow
YANG Hao, Faculty of Engineering , China University of Geosciences (Wuhan ), Wuhan , Hubei 430074 , China
LIN Juntao, Faculty of Engineering , China University of Geosciences (Wuhan ), Wuhan , Hubei 430074 , ChinaFollow
XIAO Yue, School of Materials Science and Engineering , Chang’an University , Xi’an, Shaanxi 710061 , China ;Xi’an Key Laboratory of Modern Transportation Function Materials , Chang’an University , Xi’an, Shaanxi 710061 , China

Corresponding Author

林俊涛，男，博士，副教授.E-mail：linjt@cug.edu.cn

Abstract

In order to investigate the adhesion mechanism at the interface between geopolymer-modified emulsified asphalt slurry and aggregate,the interfacial adhesion performance was studied by the molecular dynamics method and compared with that of cement-modified emulsified asphalt slurry.In addition,macro-scale splitting strength tests were performed for verification.The results indicate that van der Waals forces play a major role in the adhesion at the slurry-aggregate interface.Under equivalent mix ratios,the interfacial binding energy between the geopolymer-modified emulsified asphalt slurry and aggregate is 6.84% ‒19.99% higher than that of the cement system.The adhesion performance is closely related to the diffusion properties and atomic distribution of the slurry.Simulated pull-out tests show that under corresponding mix ratios,the maximum interfacial tensile stress between geopolymer-modified emulsified asphalt slurry and aggregate is 9.06% ‒20.91% higher than that of the cement system.The macro-scale splitting strength tests reveal that the maximum splitting strength of geopolymer-modified cold recycled asphalt mixtures after 28 days of curing reached 1.982 MPa.When the emulsified asphalt-to-geopolymer ratio is 1:1,the result is consistent with the simulation findings,demonstrating that the molecular dynamics method can effectively reveal the adhesion mechanism at the interface between geopolymer-modified emulsified asphalt slurry and aggregate.

Publication Date

8-15-2025

DOI

10.14048/j.issn.1671-2579.2025.04.010

First Page

77

Last Page

85,94

Submission Date

August 2025

Recommended Citation

Chao, ZHONG; Hao, YANG; Juntao, LIN; and Yue, XIAO (2025) "Adhesion Mechanism of Geopolymer-Modified Emulsified Asphalt Slurry at Interface with Aggregate," Journal of China & Foreign Highway: Vol. 45: Iss. 4, Article 10.
DOI: 10.14048/j.issn.1671-2579.2025.04.010
Available at: https://zwgl1980.csust.edu.cn/journal/vol45/iss4/10

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