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Glossary
A
Aggregate
Various hard, inert materials such as sand, gravel, pebbles, etc.
used as the bulk material in asphaltic mixes.
Angle of Attack
The angle that exists between the bottom of the screed and the
grade over which the screed is traveling.
Auger
The broad, spiral flange on a screed which rotates and spreads
paving material evenly in front of the screed.
Auger Shadows
The dark and light areas along the length of a mat surface
caused by the compaction of materials having different
densities and textures.
Automatic Feed Controls
The dual feed system on a paving machine used to maintain a
constant head of material in front of the screed.
Automatic Grade and Slope Controls
Sensing equipment used on paving machines to set and
maintain proper elevations and percent slope. Paver Control
System Five™ provides paver operators with automatic grade
and slope control.
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