Wetting Model of Asphalt on the Aggregate Surface and Its Effect Factors

Wetting is the process where asphalt infiltrates into the aggregate surface, which is important for the bonding between asphalt and aggregates. In this paper, the aggregate surface textures were simplified to V shape, and a wetting model was established to research the effects of initial temperature...

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Bibliographic Details
Published inAdvances in materials science and engineering Vol. 2019; no. 2019; pp. 1 - 7
Main Authors Tan, XiaoYong, Pi, YingXing, Li, Yan, Pi, YuHui, He, MingMing
Format Journal Article
LanguageEnglish
Published Cairo, Egypt Hindawi Publishing Corporation 2019
Hindawi
Hindawi Limited
Subjects
Aggregates
Asphalt
Asphalt pavements
Bond strength
Civil engineering
Contact angle
Cooling effects
Cooling rate
Energy
Infiltration
Surface layers
Surface tension
Texture
Viscosity
Water damage
Wetting
China
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Summary:Wetting is the process where asphalt infiltrates into the aggregate surface, which is important for the bonding between asphalt and aggregates. In this paper, the aggregate surface textures were simplified to V shape, and a wetting model was established to research the effects of initial temperature and cooling rate of asphalt and aggregate surface texture sizes on the wetting process. The results show that the asphalt infiltrates into the aggregate surface texture faster in the preliminary stage and slower in the later stage. Cooling rate and lower initial temperature of asphalt affect the surface tension and viscosity, resulting in a longer wetting process, but the effects of cooling rate could be ignored in actual practice. The relationship between the infiltration ending time and surface texture size was established, and it is found that the infiltration ending time is essentially proportional to the texture depth squared and inversely proportional to the texture width.
ISSN:1687-8434
1687-8442
DOI:10.1155/2019/4126464