Durability Cracking

Description

Closely spaced crescent-shaped hairline cracking pattern.

Occurs adjacent to joints, cracks, or free edges; initiating in slab corners. Dark coloring of the cracking pattern and surrounding area.

How to Measure

Record number of slabs with “D” cracking and square meters of area affected at each severity level. The slab and affected area severity rating is based on the highest severity level present for at least 10 percent of the area affected.

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 well-defined, 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.