Evaluation of adhesion between Styrene-Butadiene-Styrene (SBS) modified asphalt and aggregates based on rolling bottle test and image processing

The adhesion performance between asphalt and aggregates is one of the key parameters to ensure the water resistance of asphalt mixtures. The traditional method is using the water boiling method to evaluate the adhesion between asphalt and aggregates. Because of the strong adhesion between SBS asphalt and aggregates, removing SBS asphalt from the surface of aggregates using the water boiling method to assess the adhesion between various types of rocks and SBS asphalt is challenging. Hence, this paper proposed rolling bottle test and image processing to assess the adhesion property between SBS asphalt and aggregates. Eight types of rock aggregates and SBS modified asphalt (virgin and long term aging) were selected for rolling bottle test. A method for calculating asphalt peeling rate on aggregate surface based on image processing was proposed. A computing program, pr -cal , was developed and verified with area calculation program. The result shows that the error is around 10%, which indicates that the peeling rate calculation program is relatively accurate. The results of the peeling rate data indicates that limestone has the better adhesion, granite has the worst adhesion, and the adhesion of other rock types aggregates(basalt, diabase, tuff) is in the middle. The adhesion of the same rock type aggregates from different sources is also different, and asphalt aging will reduce its adhesion performance with aggregates.