Paving Principles & Control Methods
Topcon Paver System Five Operator’s Manual
2-10
Adherence to mix design specifications is usually the
responsibility of the material supplier.
Segregation is a material deficiency caused by a separation
of the larger aggregate sizes from the bulk of the paving
material.
This condition is encountered especially in mixes with
relatively large maximum size aggregate (example: 1" and
larger, the so called “large-particle” mixes). When paving
material is deposited in piles, as in an asphalt plant silo, a
haul truck, a paver hopper, on the ground in front of the
paver in a windrow, or on the ground in the auger chamber,
segregation can and does frequently occur.
NOTICE
NOTICE
The areas listed above where segregation can
occur are all areas that the material may
encounter before being laid down as a mat.
Therefore, these areas of segregation must be
addressed prior to any paving. The screed
cannot rectify segregation during the paving
process.
Segregation can also be the result of improper hopper
dumping.
During normal operation, the vibration of the pavers hopper
will cause segregation. Therefore, dumping the hopper after
each truck should be avoided because material that has
rolled to the outside of the hopper (the large aggregate) will
fill the conveyors and auger chamber and result in a
segregated area behind the paver with a noticeable
difference in surface texture.
If It Doesn't Look Right, It Isn't Right:
Surface and texture
irregularities indicate that the homogeneous characteristics
To Next Page
Loading...
Need help?
General
