TM 5-809-12/AFM 88-3, Chap. 15
d. Special joints and junctures. Situations will
The design of the thickened-edge slip joint will be
develop where special joints or variations of the
similar to the thickened-edge construction joint (fig
more standard type joints will be needed to
5-13). The bond-breaking medium will be either a
accommodate the movements that will occur and to
heavy coating of bituminous material not less than
provide a satisfactory operational surface. Some of
1/16 inch thick when joints match or a normal
these special joints or junctures are discussed below.
nonextruding-type expansion joint material not less
(1) Slip-type joints. At the juncture of two
than 1/4 inch thick when joints do not match. The
pavement facilities, expansion and contraction of the
1/16-inch bituminous coating may be either a low
concrete may result in movements that occur in
penetration (60-70 grade asphalt) or a clay-type
different directions. Such movements may create
asphalt-base emulsion similar to that used for roof
detrimental stresses within the concrete unless
coating (Military Specification MIL-R-3472) and
provision is made to allow the movements to occur.
will be applied to the face of the joint by hand
At such junctures, a thickened-edge slip joint shall
brushing or spraying.
be used to permit the horizontal slippage to occur.
5-20
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