Cracksealing by Rose Paving
Cracksealing is a preventative parking lot maintenance action that offers several benefits against pavement deterioration. Effective cracksealing keeps water from entering and weakening the base or sub-base of the asphalt.
- 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 the cracks in your parking lot can prevent problems from spreading and can extend the life of the pavement. Cracksealing and pavement repair when you first notice deterioration can lead to significant cost savings and delay expensive parking lot resurfacing needs.
Know Your Parking Lot Crack Types
Parking Lot Crack Type 1: Reflective
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.
Parking Lot Crack Type 2: Block
Block cracks are called such due to the square pattern formed in the cracking, with cracks intersecting each other at nearly right angles. A lack of traffic can be a common cause of block cracks, since steady traffic constantly kneads the pavement and helps keep it pliable and flexible. Block cracks can also be caused by excessive air voids, low-penetration asphalt, or exposure to overly high temperature.
Parking Lot Crack Type 3: Edge
Edge cracks appear only parallel to and within 18 inches of the edge of the pavement. Edge crack causes include poor base, lack of shoulder support, poor drainage, or frost action.
Fatigue or Alligator
Parking Lot Crack Type 4: Joint
Pavement “joints”, or joint cracks, 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, joint cracks appear. There can be a number of reasons why pavement mats don’t bond.
Parking Lot Crack Type 5: Slippage
Slippage cracks are usually crescent-shaped and are caused by heavy traffic that is continuously stopping, turning, or climbing a hill. The stresses of these actions 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.
Parking Lot Crack Type 6: Fatigue or Alligator
Fatigue cracks or Alligator cracks are pavement cracks caused by aging, oxidation, structural inadequacy, or another reason that has caused the pavement to become less tolerable to vertical deflections. Note: Rose Paving generally recommends removing or replacing pavement that has reached this stage of deterioration, rather than sealing or filling. Contact us to discuss your needs with a Rose Paving team member.
Crack Routing Services
In some cases, crack widening or routing is necessary. Crack routing creates a proper reservoir to which the crack sealant material adheres. There are a number of factors that can determine the configuration of crack routing, including crack type, pavement downtime, and budget. Routing is strongly suggested in truck areas, but not in cracks that have already been sealed.
Pavement Repair Procedures
Rose Paving follows a specific and detailed process for both cracksealing and crack routing. Detailed specifications for both are available for download in our Cracksealing Technical Specs library.