Transportation
Hauling hot mix asphalt and concrete from the plant to the paver, the trucks used, and how to keep a mix from segregating on the way.
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Trucks
Transport
Mix transport involves everything required to convey HMA from a production facility to a paving site including truck loading, weighing and ticketing, hauling to the paving site, dumping of the mix into the paver or material transfer…
End Dump Truck
End dump trucks unload their payload by raising the front end and letting the payload slide down the bottom of the bed and out the back through the tailgate (Figure 1, 2 and Video 1).
Bottom Dump Truck
Bottom dump trucks, most often used for HMA in more rural settings, (Figure 1) unload their payload by opening gates on the bottom of the bed. Internal bed walls are sloped to direct the entire payload out through the opened gates.
Live Bottom Truck
Live bottom (or flo-boy) dump trucks (Figures 1-4) have a conveyor system at the bottom of their bed to unload their payload. HMA is discharged out the back of the bed without raising the bed (Video 1).
Asphalt
HMA Transport
Mix transport involves all actions and equipment required to convey HMA from a production facility to a paving site including truck loading, weighing and ticketing, hauling to the paving site, dumping of the mix into the paver or material…
Segregation in Transport
"Segregation" is a term often used in the HMA industry to describe a number of different phenomena. It's most general definition comes from Stroup-Gardiner and Brown (2000):
Concrete
PCC Transport
Mix transport involves all actions and equipment required to convey PCC from a batching facility to a paving site including truck loading, weighing and ticketing, hauling to the paving site, mixing (if required), agitation, placing, truck…
PCC Truck Mixer
Truck mixers are the most common mode of PCC transport. They consist of a truck-mounted drum that rotates on an inclined axis.