Study on the Relationship Between Adhesion of Asphalt-bottom Ash Interface and Water Stability of the System
In order to investigate the relationship between the interfacial adhesion between bottom ash-asphalt and the water stability property of asphalt mixtures,two types of asphalt were selected and two particle sizes of bottom ash were used as aggregates.According to the surface free energy theory,the surface energy parameters(work of adhesion,work of debonding)of each component were calculated to evaluate the adhesion and water damage resistance.The effect of bottom ash particle size on the system was investigated by comparison.The results show that the bottom ash can bond spontaneously to the asphalt,but the presence of water leads to peeling of the bottom ash from the asphalt.The adhesion between bottom ash with different particle size and asphalt was different significantly.Fine bottom ash had the highest work of adhesion and the lowest work of debonding with asphalt,indicating that the use of small particle size bottom ash as an aggregate has an improved effect on the overall water damage resistance of the mixture.The results of the boiling method illustrated the reliability of this study.The study verifies the correlation between bottom ash-asphalt adhesion and the water stability of asphalt mixes with bottom ash.And it also provides a quantitative test method for the water stability of asphalt mixes with bottom ash.
road engineeringsurface energy theoryadhesionasphalt mixture with bottom ash
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