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Repairing Block Cracking with:

Flush Fill Crack Seal Simple Overband Crack Seal Overband Crack Seal

Similar to fatigue cracking, block cracking appears as an interconnected network of square or rectangular shaped cracks. Typically caused by thermal expansion/contraction, reflection of cracking below the top layer, and poor flexibility of asphalt binder, this type of cracking often occurs over a wide area and can appear in non-traffic areas. The blocks can vary in size, with larger blocks classified as longitudinal and transverse cracking.

Another common and cost-effective method of sealing pavement cracks, flush-fill crack sealing is accomplished by filling a crack with crack sealant material flush with the surface of the pavement. There may be slight settling as the material cools, creating a very shallow channel, but flush-filling a crack seals out moisture and incompressible debris, protecting the base and walls of the crack, as well as provides a flexible filler that will move with the pavement during thermal expansion/contraction cycles. This method is usually chosen when a surface treatment or overlay is planned and/or when an overband is not wanted or required.

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