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AF2903 Road Construction and Maintenance Placement of Hot Mix Asphalt. Dr. Alvaro Guarin Highway and Railway Engineering Department of Transportation Science. Asphalt Production ( Batch Plant ). Asphalt Production ( Continuous Plant ). Asphalt Production. Asphalt Production.

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AF2903 Road Construction and Maintenance

Placement of Hot Mix Asphalt

Dr. Alvaro Guarin

Highway and Railway EngineeringDepartment of Transportation Science


AsphaltProduction (BatchPlant)


AsphaltProduction (ContinuousPlant)


AsphaltProduction


AsphaltProduction


AsphaltProduction


Control segregation

No

Yes


TarpingLoads


BottomDumptruck


Live BottomTruck


EndDumpTruck


MaterialsTransfer Vehicle


MaterialsTransfer Vehicle


Self propelled paving machine
Self Propelled Paving Machine

THE BASIC PRINCIPLE HAS NOT CHANGED MUCH


Types of Pavers

Wheel type


Types of Pavers

Track type





Operational principles of the screed
Operational Principles of the Screed

  • Self-leveling concepts

  • Screed response versus distance

  • Forces acting on a screed


Main forces acting on screed
Main Forces Acting on Screed

  • Speed of paver

  • Head of material

  • Angle of attack

  • Other forces

    • Pre-compaction

    • Screed weight



Types of grade reference
Types of Grade Reference

  • Stringline

  • Mobile reference

  • Joint matching shoe

  • Sonic sensor

  • Laser guided controls








Mixture Laydown Problems

Centerline

Segregation



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