HMA PLANT
OPERATION
Types Of Plants
BATCH
DRUM MIXER
Basic Purpose Of HMA
Plants
To produce a quality
hot asphalt mixture
that contains the
desired proportions
of asphalt and
aggregate and meets
all specifications.
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Batch plant
typical layout
Asphalt Storage
Conveyor Belt
Aggregate
Bins
Dryer
Burner
Hot
elevator
Batch
Tower
Storage
Silo
Drum Mixer Plant
typical layout
Asphalt Storage
Aggregate
Bins
Conveyor Belts
Dryer
Burner
Storage
Silo
Common Plant Operations
• Cold aggregate storage and
feeding
• Dust control and collection
• Mix storage
• Weighing and handling
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Common Plant Operations
• Cold aggregate storage and
feeding
• Dust control and collection
• Mix storage
• Weighing and handling
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Aggregate Stockpile
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Stockpiling Operations
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Cold Feed
BINS
Conveyor
Belts
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Common Plant Operations
• Cold aggregate storage and
feeding
• Dust control and collection
• Mix storage
• Weighing and handling
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Hma Mixing Plants Create
Dust
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Centrifugal Dust Collector
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Baghouse Dust Collector
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Collector Efficiency
74 micron
30 micron
Cylone (80-90%)
Multicone (80-90%)
10 micron
5 micron
1 micron
Wet collector (90-96%)
Baghouse
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Common Plant Operations
• Cold aggregate storage and
feeding
• Dust control and collection
• Mix storage
• Weighing and handling
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Storage Stucture
Typical Layout
Conveyor
HOT
MIX
PLANT
Surge
Bin
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SURGE
SILO
Common Plant Operations
• Cold aggregate storage and
feeding
• Dust control and collection
• Mix storage
• Weighing and handling
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Plants are computer
controlled
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TRUCK BEING
LOADED FROM
A DIRECTLY
FROM A BATCH
PLANT
Truck Being Loaded From A
Surge Silo
Truck
Loading
from a
Surge
Bin
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BATCH PLANT
typical layout
Asphalt Storage
Conveyor Belt
Aggregate
Bins
Dryer
Burner
Hot
elevator
Batch
Tower
Storage
Silo
Batch Plant
Batch Tower
Pug Mill
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