The study looked at how well asphalt sticks to rocks in roads. They tested different conditions like temperature and loading rate to see how strong the bond was. They found that higher temperatures made the bond weaker, while faster loading made it stronger. Some rocks, like calcite and limestone, bonded best with asphalt. Certain parts of asphalt, like asphaltenes and resins, helped the bond, while others, like saturates and aromatics, made it weaker. Older asphalt was worse at sticking to rocks. The type of chemicals in the asphalt had the biggest impact on how well it stuck. They also found a way to measure how well the asphalt stuck to rocks.