Subsidence is often where the surface below the asphalt is weakened by:
Or, the ground (substrate) under the asphalt covering, will not support the load. I.e. The ground does not have sufficient, suitable material to support the load, and the supporting material may not have been sufficiently compacted to prevent settling.
Typically the area will sink, the asphalt surface will stretch, which in turn causes cracking. The asphalt surface can then break up, leading to potholes.
Can be caused by overuse, such as repeatedly parking in the same spot. Or, placing something heavy on top of the asphalt, (such as an axle stand, where the feet penetrate the asphalt, as the load has not been evenly distributed – A point load).
Changes in temperature can also have an affect. E.g. heat causing asphalt to become more pliable and break up. Or, where heavy items sink into the asphalt.
Tools & Materials Required
Tools for digging holes (worse case).
A power washer (preferred), or a hose with spray attachment (for cleaning the surface).
Paint brushes, (these should be throw away items).
A pot for storing dirty brushes (so they don’t dry out).
Topics Subsidence:Overloading:Prevention:Tools & Materials Required:The Repair:Notes (Hints & Tips): Subsidence: Subsidence is often where the surface below the asphalt is weakened by: Erosion.Or, the ground (substrate) under the asphalt covering, […]