Durability Cracking

Description

Closely spaced, crescent-shaped hairline cracking pattern.

Occurs adjacent to joints, cracks, or free edges. Initiates at the intersection, e.g., cracks and a free edge.

Dark coloring of the cracking pattern and surrounding area.

Severity Levels

Low
“D” cracks are tight, with no loose or missing pieces, and no patching is in the affected area.

Moderate
“D” cracks are welldefined, and some small pieces are loose or have been displaced.

High
“D” cracking has a well-developed pattern, with a significant amount of loose or missing material. Displaced pieces, up to 0.1 m2, may have been patched.

How to Measure

Record number of affected transverse cracks at each severity level and the square meters of area affected at each severity level. The transverse crack and affected area severity rating is based on the highest severity level present for at least 10 percent of the area affected.