ASPHALT ANSWERS
Segregation not only affects the visual performance of your job, it can lead to premature failure.
corrected by putting a small section of augers
mounted backwards to wash the material
through. This can also occur if the
screed extensions are brought in and out
several times in a short amount of time.
Joint or Edge Segregation occurs at the
end or edge of the mat, or at the joint if
you are matching joints. This is normally
caused by running the augers and conveyors
too fast or paving faster than the conveying
system can keep up with. This can
be fixed by running your conveyors slower
and not bringing in your hopper wings
as much. The next thing that will help is
augering shorter distances and running
your augers as slow as you can while still
keeping up with paving speed. Remember
your best and most efficient paving is 11
to 13 foot wide.
Random Segregation is one of the hardest
to determine where the problem is
coming from. Most times it is somewhere
at the plant. Most often in the drum or
silo. Remember it can start at the aggregate
stock pile. Take a drive past one of
the asphalt plants aggregate stock piles
and you will see segregation at the bottom
edge of all the piles. Most plants correct
plant issues by how they draw from the
stock pile when loading the stone into the
plant. Then they also add baffles at places
in the mixer, batcher and silo to help keep
segregation from occurring.
Practice good paving principals. Load
the truck properly and pave 11 to 13 foot
wide. Run your conveying system at a
slow steady pace and pave at a speed that
allows everything to flow smoothly. This
makes for a better job which can show
by meeting ride specification and density
requirements or having a good looking
parking lot. All of this will help you make
bonus money on a highway job or keep
an owner happy.
It’s a great day to pave.
Tony Wight, LeeBoy Territory
Manager and can be contacted at
[email protected].
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1.800.210.5923 [13]
July 2020