Block 15 Batch Plants 13

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?