Crack filling is a first defense against pavement deterioration offering several important benefits. Effective crack filling keeps water from entering and weakening the base or sub-base. It helps preserve the pavement adjacent to the cracks; prevents sand, stone, and dirt from making its way into open cracks causing compressive stresses; and extends pavement life by minimizing crack growth. Proper attention to cracks prevents problems from spreading and doubles the life of the pavement. Pavement repair in early stages of deterioration pay big dividends later delaying costly resurfacing.
In addition to all of the above, cracks look bad and can be a bad reflection on the business and even hurt property values. Repairing cracks can be an inexpensive way to not only make your property look good, but also extend the life of your pavement or asphalt for years to come by preventing future problems and deterioration. Cracks or chunks missing from your pavement can also be a safety and liability issue. Avoid all of the above potential downfalls by having your cracks repaired. D & R Paving will make solving these problems easy on your time and budget.
Below are some common crack types and the ramifications of each.
- Reflective Cracks
- Reflective cracks happen when an existing crack or joint in the underlying pavement structure reflects upward through the surface. Reflective cracks are primarily in resurfacing projects, but low severity cracks can occur in new pavement. Reflective cracking shortens the service life of overlays on asphalt and concrete pavement.
- Block Cracks
- Visually, this type of cracking forms a square pattern, with cracks intersecting each other at nearly right angles. A common cause of this on parking lots is lack of traffic, (steady traffic constantly kneads the pavement and keeps it flexible). Other causes include excessive air voids, low-penetration asphalt, or an overly high plant mix temperature.
- Edge Cracks
- Edge cracks appear only parallel to and within 18 inches of the edge of the pavement. Causes include poor base, lack of shoulder support, poor drainage, or frost action.
- Joint Cracks
- Pavement “joints” are created during initial construction when the edges of two pavement mats are placed next to each other. These constructed joints usually have a lower density of asphalt than that of the surrounding pavement. If the mats don’t bond properly (for a variety of reasons), joint cracks appear.
- Slippage Cracks
- Slippage cracks are usually crescent-shaped and caused by heavy traffic that is stopping, turning, or climbing a hill. Resultant stresses cause a bond failure between the upper and lower pavement layers. The open end of the U-shaped crack always points in the direction of the applied force.
- Fatigue or Alligator Cracks
- Over time, a flexible asphalt pavement becomes more rigid and is less able to tolerate vertical deflections. This causes tension in the pavement and results in alligator-type cracking. Such cracking can also occur from structural inadequacy, aging, and oxidation. It is generally recommended that alligator areas be removed and replaced rather than filled or sealed.
Patching is a common asphalt repair on areas of pavement with potholes. Pavement blemishes and deterioration are going to occour as asphalt age and traffic continuously pounds them. If timely maintenance isn’t performed, the deteioration of the asphalt will get worse and worse until a full replacement job is warranted. Asphalt Patching will help prevent this cost by addressing the small problem before it becomes a large one. Cracks turn into potholes and potholes turn into craters.
Potholes occur when water seeps into pavement through unsealed or improperly sealed cracks. When the water freezes, it expands and enlarges the crack. When the ice under the pavement melts, a void is left. Surrounding pavement falls into the void and forms a pothole. Asphalt Patching is a very efficient way of maintaining your asphalt and repairing cracks without spending a ton of money to do so.
Asphalt Repair Procedure
Patching is quite simple. It is the process of filling potholes or excavated areas in the asphalt and pavement. This process consists of filling damaged areas with hot or cold asphalt mix, depending on the season or location of the site. Addressing the issues in a timely fashion will help control further deterioration and costly repair of the asphalt. If not addressed, water can enter the subgrade and cause larger and more serious pavement problems. If this occurs, simple patching will not be able to solve the problem.
A full-depth or deep patch is considered a permanent solution, while a surface patch pothole repair is usually a temporary fix. Materials for patching include hot mix asphalt, asphalt emulsion mixes, stockpile patching mixes, and proprietary patching mixes with special blends of aggregate and modified binders.
Full-depth patching is the removal of the entire asphalt or pavement surface layer, regardless of its thickness, over the patching area. Deep patching is the removal of four inches or more of the pavement surface course. Full-depth patching applies to either asphalt or concrete pavements, but deep patching applies only to asphalt pavements.
D and R paving is happy to visit your location and assess your situation. Hopefully, we can find a solution for you that saves you money and extends the life of your driveway or parking lot. Many times, thousands of dollars in costs are avoided if the situation is assessed properly. Contact Us today for a free on-site evaluation!