highway materials
MALAYSIAN'S ROAD SYSTEM 3. PAVEMENT LAYERS Subgrade Subbase Road base crisab2832july2009 2 Surfacing 4. PAVING MATERIALS Aggregate Bitumen 5. PREMIX PLANTS Drum mix plant Batch plant. INTRODUCTION The needs for roads stems from the invention of wheels in Samaria –3000SM Among early roads: Silk Route Persian Empire Britain/Europe .