Hot mix asphalt production

Road Pavement Forum: 10th April 2006 Chris Lange PMP, Pr.Tech.(Eng) Director (Technical) Much Asphalt (Pty) Ltd         Plant types and basic components Plant calibration Dust extraction Filler handling and control Aggregate heating Procurement / handling of raw materials Finished product storage Delivery Exhaus t Fan Filter Baghouse Primary dust collector Hot Storage Bins HMA made continuously and sent to storage silos Bitumen Tanks Scalping screen to remove oversize aggregate Belt scale Drying and mixing drum Cold Feed Bins TWIN DRUM PLANT : COUNTERFLOW RAP Feed Plant filler storage and feed Filter Baghouse Finished product storage Coating & mixing drum Aggregate feed Drying & heating Drum Parallel-Flow Drummixer Zones Air Combustion Heating Drying Mixing BIT Hot Mix Asphalt Counter-Flow Drummixer Zones Air Mixing Combustion Heating Hot Mix Asphalt Bitumen Drying Aggregate Counter-Flow Batch Plant Dryer Zones Combustion Heating Drying Air Aggregate Hot Aggregate Batch Plant Elements Primary Batch/Mixing tower Filter Baghousecollector Hot Storage silos Bitumen storage tanks RAP ye r D Feed r ru D feed bins Cold m Plant Automation – Operating System Graphics Binder Content Voids in Mix Filler Content Plant Mixing Tower Skip Bucke t Winc h The End