There is no repair or patch for asphalt that is adequate. Asphalt pavement will only maintain its integrity as a continuous surface. Once the surface is broken it cannot be repaired.
Potholes are an example of this. Crews can patch a pothole with whatever, but water will manage to get?ÿ under the patch at the edges. Taking the fact that water is incompressible, and adding the dynamic force of vehicle tires running over the patch, something has to give. Pieces of the patch will fly out until the pothole reappears.?ÿ?ÿ
I'm luck that where I practice monuments are placed on the edge line of a right of way, not the center line. I think this is a much better idea for the longevity of the asphalt.
When I worked in research and materials we had a machine that would core the asphalt. We would bring the cores back to the laboratory for testing. However, as technology improved we were able to use non-destructive methods of testing. We eliminated the need for coring the asphalt, and compromising its integrity.?ÿ
Historic boundaries and conservation efforts.