TM 5-623
How to Measure:
Weathering and raveling are measured in square feet of surface area.
ALPHABETICAL LISTING OF DISTRESS TYPES-JOINTED CONCRETE PAVEMENTS
Name of Distress:
Blow-up/Buckling.
Description:
Blow-ups or buckles occur in hot weather, usually at a transverse crack or joint
that is not wide enough to permit slab expansion. The insufficient width is
usually caused by infiltration of incompressible materials into the joint space.
When expansion cannot relieve enough pressure, a localized upward
movement of the slab edges (buckling) or shattering will occur in the vicinity
of the joint. Blow-ups can also occur at utility cuts and drainage inlets.
Severity Levels:
L-Buckling or shattering causes low-severity ride quality (fig B-72).
Figure B-71. High-severity weathering and raveling.
Figure B-72. Low-severity blow-up/buckling.
M-Buckling or shattering causes medium-severity ride quality (figs B-73 and B-
74).
B-24
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