TM 5-822-7/AFM 88-6, Chap. 8
RCCP to help prevent excessive lateral displacement
b. Proper time for rolling. Ideally, the consistency
of the lane upon further rolling), followed by two
of the RCCP when placed should be such that it may
passes within 12 to 18 inches of the interior edge.
be compacted immediately after placement without
This will leave an uncompacted edge to set the
undue displacement of the RCCP. However, no more
height of the screed for an adjacent lane, and allows
than 10 minutes should pass between placing and
both lanes of the fresh joint to be compacted simul-
the beginning of the rolling procedure. The rolling
taneously. Any remaining uncompacted material in
should be completed within 45 minutes of the time
the center of the lane should be compacted with two
that water was added at the mixing plant. A good
indication that the RCCP is ready for compaction is
passes of the roller. This pattern should be repeated
once to make a total of four passes on the lane (or
found by making one or two static passes on the
more if the specified density is not achieved) (see fig
RCCP within 1 foot of the edge of the lane before
D-2). If the interior edge will be used to forma cold
vibrating begins and observing the material during
joint, it should be rolled exactly as the exterior edge
these two passes to insure that undue displacement
was rolled, taking care to maintain a level surface at
does not occur. If the RCCP is too wet or too dry for
the joint and not round the edge. When the adjacent
compaction upon placing, the water content should
lane is placed, two passes should be made about 12 to
be adjusted at the plant. Only minor changes in
18 inches from the outer edge of the lane (again, to
water content from the design mix should be made;
confine the concrete) followed by two passes on the
otherwise, a new mix design may be needed. With
fresh joint. The first two passes should extend 1 to 2
practice, the roller operator should be able to tell
inches over the outer edge of this adjacent lane if the
whether the consistency of the RCCP is satisfactory
lane will form an outer edge of the completed pave-
for compaction.
ment. Any remaining uncompacted material in the
c. Rolling pattern. After making the static passes,
the vibratory roller should make four vibratory
lane should be rolled with two passes of the roller.
This pattern should be repeated to make a total of
passes on the RCCP using the following pattern: two
four passes over the RCCP. Additional passes may
passes on the exterior edge of the first paving lane
(the perimeter of the parking area or the edge of a
be necessary along the fresh joint to insure
road) so that the rolling wheel extends over the edge
smoothness and density across the joint (see fig
of the pavement 1 to 2 inches (done to "confine" the
D-3).
D-8
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