TM 5-822-11/AFP 88-6, Chap. 7
provided to coat both sides of the joint with
b. Preformed Compression Seals Application
lubricant prior to the installation of the preformed
Procedure. The sides of the joint seal and/or the
seal.
sides of the joint shall be covered with a coating
of lubricant/adhesive and the seal installed into the
5-3.
Application Procedure.
joint leaving a c to inch recess below the
a. Field-Molded Application Procedure. Apply
pavement surface. Longitudinal joints shall be
the sealant in the joint or crack reservoir from the
sealed first, followed by transverse contraction
bottom to the top to prevent trapping air bubbles
joints. The seal in the longitudinal joints shall be
in the sealant. The sealant should be recessed 1/8
cut where the transverse joints intersect to allow
to 1/4 inch below the pavement surface. The joint
placement in the transverse direction. The lubri-
or crack must not be overfilled with sealant. The
cant/adhesive should be allowed to dry prior to
recess of the sealant prevents it from being pushed
cutting the seal at the joint intersections. Any
out of the reservoir and becoming damaged by
lubricant/adhesive spilled on the pavement shall be
traffic when the pavement expands. Any excess
removed immediately to prevent setting on the
hot-applied sealant that gets on the pavement
pavement. The in-place joint seal should be in an
surface can be removed using heated blades, the
upright position, free from damage, and without
cold-applied sealants may be simply scrapped off
stretching or compression of the seal in excess of
before the sealant cures. In no instance should a
2 percent. Stretching the seal by greater than 2
joint or crack be overfilled. Also, when sealing
percent can create the forming of gaps where the
cracks in bituminous pavements that are to be
seal has to be cut.
overlaid, it is important to recess the sealant 1/4 to
c. Weather Limitations. The weather conditions
inch below the pavement surface. The recess
during a sealing project will affect the perfor-
will help prevent bleeding of the sealant material
mance of the sealant material. Weather consider-
through the overlay.
ations during the project include the following:
5-4
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