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Block Cracking

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.

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.