Potholes & Pavement
Pavement distresses accumulate as asphalt pavements age and traffic pounds them. If timely maintenance isn’t performed, distresses are compounded. Cracks become potholes and potholes become craters.
- Prevents the intrusion of water through the crack into the underlying pavement structure.
- Prevents extraneous materials from entering the crack and causing further deterioration as the pavement expands and contracts with temperature changes.
- Crack sealing will last three to eight years depending on climate, materials used and pavement conditions.
Patching is the process of filling potholes or excavated areas in the asphalt pavement. Quick repair of potholes or other pavement disintegration helps control further deterioration and expensive repair of the pavement. Without timely patching, water can enter the subgrade and cause larger and more serious pavement failures.
Cold Weather Emergency Patching
Sometimes pothole repairs in an emergency situation or during cold or inclement weather are necessary. They are temporary in nature and are done quickly for the safety of motorists. There are four methods for this type of repair: throw-and-roll, throw-and-go, semi-permanent and spray injection.
- The throw-and-roll method cleans the debris and water from the pothole with a stiff broom, fills the pothole with asphalt material and compacts it, leaving a one-eighth or one-quarter inch crown. The material is compacted with a hand tamper or the truck tires.
- Throw-and-go differs from throw-and-roll in that there is no compaction. The filled pothole is compacted by normal traffic.
- The semi-permanent method requires that water and debris be removed from the pothole. The contractor must square up the sides of the patch and make sure the edge is cut back into good pavement. The asphalt mix is placed in the patch and compacted to produce a flush or nearly flush patch. More patch time is required but the patch will normally last longer. The spray injection method may also be used for emergency patching.