2. What is asphalt paver ?
A self-propelled formless laydown machine with a floating screed. HMA is loaded in the front,
carried to the rear by a set of flight feeders (conveyor belts), spread out by a set of augers, then
leveled and compacted by a screed.
3. Functions of asphalt paver can be divided in to two
systems
Tractor (Material Feed System)
Screed
4. Tractor (Material Feed System)
The tractor contains the material feed system, which accepts the HMA at the front of the paver,
moves it to the rear and spreads it out to the desired width in preparation for screed leveling and
compaction. The basic tractor components are:
6. Hopper
The hopper is used as a temporary storage area for HMA delivered by the transport vehicle.
Therefore, the paver can accept more material than is immediately needed and can use the
volume in the hopper to compensate for fluctuating material demands created by such things as
paving over irregular grades, utility access openings or irregular intersection shapes.
7.
8. Auger
The auger receives HMA from the conveyor and spreads it out evenly over the width to be paved
. There is one auger for each side of the paver and they can be operated independently.
9. Screed
The most critical feature of the paver is the self-leveling screed unit, which determines the
profile of the HMA being placed . The screed takes the head of HMA from the material delivery
system, strikes it off at the correct thickness and provides initial mat compaction
