What does "stripping" refer to in asphalt performance issues?

Stripping refers specifically to the loss of adhesion between the asphalt binder and the aggregate. This phenomenon can occur due to various factors, such as moisture, temperature changes, and the presence of contaminants on the aggregate surface. When stripping occurs, the bond that holds the asphalt and aggregates together is compromised, leading to reduced performance of the pavement, including potential cracking, raveling, and other structural issues.

Understanding stripping is crucial for ensuring proper asphalt performance, as it directly impacts the longevity and durability of pavement. It emphasizes the importance of selecting appropriate materials and ensuring proper mixing and construction practices to promote strong adhesion between the asphalt and aggregates. Addressing stripping through additives or sealers can help mitigate this issue, thereby enhancing the overall integrity of the asphalt pavement.