Page 15 - UNIT 3 - CONSTRUCTION OF FLEXIBLE PAVEMENT

Civil Engineering Department | DCC3113 : Highway & Traffic Engineering

Concept Dry Bound Macadam Road Base

• Graded aggregate mixture: coarse aggregate size of 37.5 mm or 50 mm and fine
aggregate size of 5 mm to filler size

• Separated into two layers with 75 mm to 100 mm thickness and compact
• Spread the 25 mm - 50 mm thickness of fine aggregate (sand) to fill the void and
compacted

• Advantage:
 Avoid aggregate isolation occurs during trip

 Low of cost
• Disadvantages:

 When it rainy, fine aggregates will wet and cannot fill the void

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Prepared by : SITI ZURAIFA BINTI MD SAH, zuraifa@pmu.edu.my