Construction of Asphalt Pavements
Selection of MaterialsPreparing Mix Design
Properly Storing AggregateProperly Drying AggregateAdding Binder and Mixing
Proper Thickness and CrownProper Density at Screen
Proper Size and Type of RollersProper Vibration Frequency
Proper Rolling Pattern
Timely DeliveryMatch Paver Speed
Topics
Production LaydownTransportation
2CIVL 4155/6155
Asphalt Plants
Batch Plant Drum Plant
3CIVL 4155/6155
Material Flow(Taken from The Asphalt Institute Manual ES‐1, Second Edition)
4CIVL 4155/6155
HeatingDrying
Cold Feed Bins
LiquidAsphaltCement
StockpiledAggregate
Material Stockpiles
5CIVL 4155/6155
Covered Stockpiles
6CIVL 4155/6155
Mix Production Costs
7CIVL 4155/6155
Batch Plant
8CIVL 4155/6155
Cold Elevator
Hot Elevator
Cold Feed Bins
11CIVL 4155/6155
ColdElevator
Aggregate Dryer
13CIVL 4155/6155
Dryer Cutaway
14CIVL 4155/6155
Mixing Tower Cutaway(Taken from The Asphalt Institute Manual ES‐1, Second Edition)
HOT ELEVATOR
SCREEN DECK & HOT BINS
16CIVL 4155/6155
Screen Deck & Hot Bins(Taken from The Asphalt Institute Manual ES‐1, Second Edition)
17CIVL 4155/6155
Pugmill Mixer(Taken from The Asphalt Institute Manual ES‐1, Second Edition)
19CIVL 4155/6155
Typical Mixing Cycle
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
20CIVL 4155/6155
Storage
SLAT CONVEYOR
21CIVL 4155/6155
Drum Plant
StorageSilo
24CIVL 4155/6155
Batch Plant
25CIVL 4155/6155
Drum Plant
StorageSilo
26CIVL 4155/6155
Parallel‐Flow Drum Plant(Taken from The U. S. Army Corps of Engineers Hot Mix Paving Handbook)
27CIVL 4155/6155
Counter‐Flow Drum Plant(Taken from The U. S. Army Corps of Engineers Hot Mix Paving Handbook)
28CIVL 4155/6155
Double‐Drum Plant(Taken from The U. S. Army Corps of Engineers Hot Mix Paving Handbook)
29CIVL 4155/6155
Double‐Drum Plant(Taken from The ASTEC Double‐Barrel Brochure)
CombustionZone Flights
ShoweringFlights
ConditioningFlights
Burner
30CIVL 4155/6155
Double‐Drum Plant(Taken from The ASTEC Double‐Barrel Brochure)
RAP EntersHere
AC EntersHere
Final ProductExits Here
Burner
31CIVL 4155/6155
Portable Drum Plant
32CIVL 4155/6155
Hot Mix Asphalt Paving
Paving Train
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Asphalt Paver
Hopper Screed
Side Arm
36CIVL 4155/6155
Asphalt Paver
Screed
Hopper
Side Arm
37CIVL 4155/6155
Paving Machine
Source: PTC Pavement Guide Interactive
38CIVL 4155/6155
Paving Machine
Source: PTC Pavement Guide Interactive
39CIVL 4155/6155
Paving Train
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Material Transfer Device
41CIVL 4155/6155
Asphalt Compaction
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Asphalt Compaction
ScreedBreakdown RollerIntermediate Roller
Finish RollerTraffic
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Asphalt Compaction
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Asphalt Compaction
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Asphalt Compaction
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