Lecture5_Asphalt_production_&_construction

Lecture5_Asphalt_production_&_construction - HMA...

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1 HMA Production Facilities and Construction Types Of Plants BATCH DRUM MIXER To produce a quality hot asphalt mixture that contains the desired proportions of asphalt and aggregate and meets all specifications Batch Type Facilities
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2 Basic Functions Produces HMA in separate batches rather than continuously as in a drum mixer Heat and dry aggregates Separate into hot bin fractions Proportion into mixer Add asphalt Mix Quality Concerns Proper aggregate proportioning Thorough heating and drying Control of asphalt and additive contents Thorough mixing Batch Plant Elements Storage silos Primary collector Secondary collector Batch tower Cold feed bins Asphalt storage tanks
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3 Aggregates travel up hot stone bucket elevator Aggregate to screens Screens size aggregate Pugmill Aggregate weigh hopper Asphalt weigh bucket Hot mix asphalt dispensed into truck Aggregate from dryer Bucket Elevators on Batch Plants Mixture Proportioning Gradation controlled at weigh hopper Asphalt content controlled at weigh bucket Hot mix produced a batch at a time
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This note was uploaded on 06/22/2009 for the course CM 3400 taught by Professor Hassan during the Spring '09 term at LSU.

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Lecture5_Asphalt_production_&_construction - HMA...

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