Chapter 2 Asphalt and Asphalt Paving Materialsweight and 75 to 85 percent by volume Figure Asphalt Flow Chart for Emulsified and Cutback Asphalts 2 2 Asphalt Paving Materials Classifications Asphalt Concrete paving aggregates are classified according to source or means of preparation Abrief description of the classifi cations follows Pit or Bank Run Aggregates Both gravel and sand are typically pit or bank run natural