2024 Volume 80 Issue 21 Article ID: 24-21002
To manage and operate the pavement infrastructure in a planned and efficient manner, it is essential to accurately assess the current condition of the pavement, predict future deterioration and carry out maintenance and repairs at the right time and in the right place. To achieve this, it is crucially important to understand how pavement damage and degradation occur and how they develop. This study focused on the interaction of asphalt aggregate interfaces and verified and discussed how damage and degradation occur and the mechanisms of their developments through physical property measurements by nondestructive microscopic measurements of asphalt mixture by X-ray CT using SPring-8. The results confirmed that asphalt delamination from aggregates, cohesive fracture of asphalt and direct contact point between aggregates with each other are possible damage initiation points and that there are effective methods to control asphalt delamination. Based on these findings, methods for contributing pavement damage control are proposed.
