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HMA ProductionConstruction Batch Plants - 1
HMA Production
BATCH PLANTS
Senior/GraduateHMA Course
HMA ProductionConstruction Batch Plants - 2
What you will learn….
• How gradation is controlled in a batch plant
• How asphalt binder is controlled in a batch plant
• Operational principles for batch plants• Using RAP & recycle production with a
batch plant
HMA ProductionConstruction Batch Plants - 3
HMA ProductionConstruction Batch Plants - 4
HMA ProductionConstruction Batch Plants - 5
HMA ProductionConstruction Batch Plants - 6
N
HMA ProductionConstruction Batch Plants - 7
Role of Dryer in Plant Process
Dry and Heat the Aggregate Materials
Production Rate of Plant Determined
by Dryer Capabilities
HMA ProductionConstruction Batch Plants - 8
Types of Dryers
• Counter-Flow Dryers – Aggregate flows toward the burner
• Parallel-Flow Dryers – Aggregate flows away from the burner
HMA ProductionConstruction Batch Plants - 9
Counter-Flow Batch Plant Dryer
HMA ProductionConstruction Batch Plants - 10
HMA ProductionConstruction Batch Plants - 11
The Modern Batch Plant Facility
HMA ProductionConstruction Batch Plants - 12
The Modern Batch Plant Facility
- gradation control at the hot bins
- asphalt binder control at the weigh bucket
HMA ProductionConstruction Batch Plants - 13
Screen Deck
HMA ProductionConstruction Batch Plants - 14
Screen Deck
HMA ProductionConstruction Batch Plants - 15
Hot Storage Bins
HMA ProductionConstruction Batch Plants - 16
Overflow Chutes
Overflowchutes
Hot bins
Screens
Weighhopper
Pugmill
HMA ProductionConstruction Batch Plants - 17
Overflow chutes
HMA ProductionConstruction Batch Plants - 18
Overflow Chutes(why two chutes?)
HMA ProductionConstruction Batch Plants - 19
Hot Bin Indicators
HMA ProductionConstruction Batch Plants - 20
Hot Bin Gates
HMA ProductionConstruction Batch Plants - 21
Hot Bin Gates
HMA ProductionConstruction Batch Plants - 22
Aggregate Sampling at Hot Bin Gate
HMA ProductionConstruction Batch Plants - 23
Aggregate Weigh Hopper
HMA ProductionConstruction Batch Plants - 24
Aggregate Weigh Hopper
AggregateWeighHopper
Asphalt BinderWeighBucket
HMA ProductionConstruction Batch Plants - 25
Weigh Hopper
HMA ProductionConstruction Batch Plants - 26
Asphalt Binder Weigh Bucket
AggregateWeighHopper
Asphalt BinderWeighBucket
HMA ProductionConstruction Batch Plants - 27
Asphalt Binder Weigh Bucket (Suspended Inside on Load Cells)
HMA ProductionConstruction Batch Plants - 28
HMA ProductionConstruction Batch Plants - 29
Pugmill(dry mix cycle, wet mix cycle)
HMA ProductionConstruction Batch Plants - 30
Live Zone in Pugmill
Livezone
HMA ProductionConstruction Batch Plants - 31
Overfilling & Underfilling Pugmills
HMA ProductionConstruction Batch Plants - 32
Inside of Pugmill
HMA ProductionConstruction Batch Plants - 33
Pre-Computerized, Electro-Mechanical Batch Automation
HMA ProductionConstruction Batch Plants - 34
Computerized Batch and Silo Loadout Automation
HMA ProductionConstruction Batch Plants - 35
Screen from Computerized Batch Automation
HMA ProductionConstruction Batch Plants - 36
“Table Top” Computerized Batch Automation
HMA ProductionConstruction Batch Plants - 37
QUESTIONS?