Paving Principles & Control Methods
Topcon Paver System Five Operator’s Manual
2-6
up in the mat that will show up in the profilograph readings.
Changing the speed of the paver will also cause the screed to
rise and fall, affecting the mat thickness.
The optimum paving speed is determined by the depth and
width being paved and the rate at which material can be
delivered to the job. Calculate the tons/hour into feet per minute
(Figure 2-9). Do not start and stop the paver.
Figure 2-9. Travel Speed to Reduce Tow Point Force (“P”)
Truck Exchange, Another Tow Point Force
It is very important that truck exchanges be carried out as
smoothly as possible to avoid disturbing the smooth,
uninterrupted forward motion of the paver. The following
lists some steps to take to avoid disturbance of the paving
operation by trucks.
1. Stop the mix delivery truck close, but not too short of
the paver. Always allow the paver to pickup trucks on
the run.
2. Never allow the truck to bump the paver. Allowing
trucks to bump the paver when backing up, can drive
the screed into the mat and produces bumps and ridges
which may not roll out.
3. Trucks applying and holding their brakes excessively
while dumping their load may cause the paver to slow,
which in turn will cause the screed to rise. The truck
driver should apply only light pressure on the brakes,
sufficient to maintain contact with the paver.
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