Hot Mix Asphalt Production

Asphalt Plants

BatchPlant

ContinuousMix Plant

DrumPlant

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Batch Plant

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Material Flow(Taken from The Asphalt Institute Manual ES-1, Second Edition)

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Typical Batch Plant(Taken from The Asphalt Institute Manual ES-1, Second Edition)

1. Cold Bins2. Cold Feed Gate3. Cold Elevator4. Dryer5. Dust Collector6. Exhaust Stack7. Hot Elevator

8. Screening Unit9. Hot Bins10. Weigh Box11. Pugmill12. Mineral Filler13. Hot AC Storage14. Weigh Bucket

Major Batch Plant Components

Typical Cold Bins

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Typical Cold Bins

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Aggregate Dryer

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Dryer Cutaway

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Mixing Tower

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Mixing Tower Cutaway(Taken from The Asphalt Institute Manual ES-1, Second Edition)

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Hot Feed Bins(Taken from The Asphalt Institute Manual ES-1, Second Edition)

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Hot Feed Bins(Taken from The Asphalt Institute Manual ES-1, Second Edition)

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Pugmill Mixer(Taken from The Asphalt Institute Manual ES-1, Second Edition)

Typical Mixing Cycle

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1. Aggregate enters pugmill from weigh box

2. Asphalt cement enterspugmill from spraybar

3. Aggregate and asphaltcement are mixed

4. Finished mix dischargedthrough pugmill gate

5. Pugmill gate closes toreceive the next batch

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Continuous Weighing(Taken from The Asphalt Institute Manual ES-1, Second Edition)

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Continuous Pugmill(Taken from The Asphalt Institute Manual ES-1, Second Edition)

Material Flow

Drum Plant

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Parallel-Flow Drum Plant(Taken from The U. S. Army Corps of Engineers Hot Mix Paving Handbook)

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Counter-Flow Drum Plant(Taken from The U. S. Army Corps of Engineers Hot Mix Paving Handbook)

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Double-Drum Plant(Taken from The U. S. Army Corps of Engineers Hot Mix Paving Handbook)

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Double-Drum Plant(Taken from The ASTEC Double-Barrel Brochure)

CombustionZone Flights

ShoweringFlights

ConditioningFlights

Burner

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Double-Drum Plant(Taken from The ASTEC Double-Barrel Brochure)

RAP EntersHere

AC EntersHere

Final ProductExits Here

Burner

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Portable Drum Plant

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Modern Fixed Drum Plant

Hot Mix Asphalt Paving

Asphalt Paver

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Hopper Screed

Side Arm

Asphalt Paver

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Screed

Hopper

Side Arm

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Paving Machine

Source: PTC Pavement Guide Interactive

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Paving Machine

Source: PTC Pavement Guide Interactive

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Paving Train

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Paving Train

Source: Pavement Guide Interactive

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Paving Train

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Shuttle Buggy