Stripping The loss of bond between aggregates and asphalt binder that typically begins at the bottom of the HMA layer and progresses upward. When stripping begins at the surface and progresses downward it is usually called raveling. A small pavement core showing...
Slippage Cracking Crescent or half-moon shaped cracks generally having two ends pointed into the direction of traffic. Slippage crack at an intersection due to stopping. The direction of traffic is from top to bottom. Most likely caused by poor bonding with the...
Rutting Pavement rutting is defined as a surface depression in the wheelpath. Pavement uplift (shearing) may occur along the sides of the rut. Ruts are particularly evident after a rain when they are filled with water. There are two basic types of rutting: mix...
Raveling The progressive disintegration of an HMA layer from the surface downward as a result of the dislodgement of aggregate particles. Raveling possibly resulting from segregation, temperature differentials or inadequate compaction. Raveling that is likely the...
Potholes Small, bowl-shaped depressions in the pavement surface that penetrate all the way through the HMA layer down to the base course. They generally have sharp edges and vertical sides near the top of the hole. Potholes are most likely to occur on roads with...
