TM 5-623
Severity Levels:
No degrees of severity are defined. It is sufficient to indicate the pumping exists
(figs B-118 and B-119).
Figure B-118. Pumping.
Figure B-119. Pumping.
How to Count:
One pumping joint between two slabs is counted as two slabs. However, the
remaining joints around the slab are also pumping, one slab is added per
additional pumping joint.
Name of Distress:
Punchout.
Description:
This distress is a localized area of the slab that is broken into pieces. The
punchout can take many different shapes and forms, but it is usually defined
by a crack and a joint, or two closely spaced cracks (usually 5 feet wide).
This distress is caused by heavy repeated loads, inadequate slab thickness,
loss of foundation support, and/or a localized concrete construction deficiency
(e.g., honeycombing).
Severity Levels:
Majority of
Number of pieces
cracks severity
2 to 3
4 to 5
>5
L
L
L
M
M
L
M
H
H
M
H
H
See figs. B-120 through B-122.
B-42
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