中外公路2025，Vol.45Issue(4)：77-85,94,10.DOI:10.14048/j.issn.1671-2579.2025.04.010
地聚物乳化沥青胶浆与集料界面的黏附机理研究
Adhesion Mechanism of Geopolymer-Modified Emulsified Asphalt Slurry at Interface with Aggregate
摘要
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.关键词
沥青混合料/地聚物/界面黏附/分子动力学/劈裂试验Key words
asphalt mixture/geopolymer/interfacial adhesion/molecular dynamics/splitting test分类
交通工程引用本文复制引用
钟超,杨浩,林俊涛,肖月..地聚物乳化沥青胶浆与集料界面的黏附机理研究[J].中外公路,2025,45(4):77-85,94,10.基金项目
国家自然科学基金资助项目(编号:52278285,51908522) （编号:52278285,51908522）
