Study On Adhesion Of Interface Between Asphalt And Aggregate

This paper sums up and evaluates many kinds of adhesion methods of asphalt to aggregate both at home and abroad. Base on making use of the theory of gray relation degree, the correlation between different adhesion experiment results and water stability of asphalt mixture is evaluated. The result indicate that immersion test has the best relation degree with water stability of asphalt mixture. On the other hand, there is not standard method to evaluate the adhesion of asphalt to fine aggregate in specification. So a new method - water-washing test is developed.By studying the properties of asphalt and aggregate that affect the adhesion, the author puts forward the mechanism of asphalt to aggregate and analyzes the reasons that modified asphalt's adhesion to aggregate can be increased. The author also points out the factors that affect the adhesion of asphalt to aggregate, the asphalt membrane's ability of resisting flaking off from aggregate, asphalt mixture's water stability and asphalt pavement's water damage. Finally, the advice that improves the ability of asphalt pavement's resisting water damage is brought forward.The interaction law between asphalt and aggregate is studied. By using new technological process, a new kind of asphalt mixture is manufactured and its Marshall stability is improved.Based on researches of the interaction mechanism between asphalt and aggregate, the writer develops a new type of antistripe additive that is used to modify aggregate. Results show that the antistripe additive can well improve the water stability of mixtures and also make the other properties of asphalt concrete improved.