Before you pick which method is best for treating your pavement cracks, it is important to understand the types of cracks that can happen:
- Transverse cracks
The crack extends in a perpendicular fashion to the centerline or laydown direction of the pavement.
Cause: thermal shifts and are the first to appear.
- Longitudinal cracks
Longitudinal cracks run parallel to the centerline or laydown direction of the pavement and appear later than transverse cracks.
Cause: Poor lane join construction, pavement shrinkage, hardening of the asphalt and shifts in temperature.
- Edge cracks
Edge cracks develop between the edge of the pavement and concrete curbs.
Cause: Seasonal thaw cycles that result in widening and deepening of the crack.
- Seam cracks
Seam cracks develop along joints of pavement.
Cause: Poor paving procedures
- Block cracks
Block cracks develop in square pieces and are spaced between 4 to 12 feet. They often appear at the end of the pavement life.
Cause: improper construction of base courses or lack of drainage.
- Reflective cracks
Cause: Changes in the movement of the sub-base, causing the surface material to crack.
Correcting sub-base courses can help eliminate reflective cracks.
- Alligator cracking
Alligator cracking is a series of interconnecting cracks that are extensive, close together and resemble an alligator’s skin.
Cause: Deterioration in the asphalt from repeated traffic loading.
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