TM 5-623
How to Count:
A scaled slab is counted as one slab. Low-severity crazing should only be
counted if the potential for scaling appears to be imminent, or few small
pieces have come out.
Name of Distress:
Shrinkage Cracks.
Description:
Shrinkage cracks are hairline cracks that are usually only a few feet long and do
not extend across the entire slab. They are formed during the setting and
curing of the concrete and usually do not extend through the depth of the
slab.
Severity Levels:
No degrees of severity are defined. It is enough to indicate that shrinkage cracks
are present (fig B-131).
Figure B-129. High-severity scaling/map
Figure B-128. High-severity scaling/map
cracking/crazing.
cracking/crazing.
Figure B-131. Shrinkage cracks.
Figure B-130. High-severity scaling/map
cracking/crazing.
How to Count:
If one or more shrinkage cracks exist on one particular slab, the slab is counted
as one slab with shrinkage cracks.
Name of Distress:
Spalling, Corner.
Description:
Corner spalling is the breakdown of the slab within approximately 2 feet of the
corner. A corner spall differs from a corner break in that the spall usually
angles downward to intersect the joint, while a break extends vertically
through the slab corner. Spalls less than 5 inches from the crack to the
corner on both sides should not be counted.
B-45
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