Description

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.

If left untreated:

Block cracking allows water penetration and channeling, resulting in damage to the base, rough riding surfaces, and larger issues like wider cracks, voids, and potholes.