Paving Principles
mmGPS 3D Paver Reference Manual
4-6
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 4-9). Do not start
and stop the paver.
Figure 4-9. 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
causes the screed to rise. The truck driver should apply only light
pressure on the brakes, sufficient to maintain contact with the
paver.
4. Dumping of material in front of the paver as the truck pulls away
after emptying its load into the hopper, can cause the paver to ride
over the pile of material with subsequent adverse effects on mat
quality. Avoid trucks pulling away prior to completely dumping
all material. Use a dump person to monitor and regulate truck
movements in front of the paver.
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