Page 14 - UNIT 3 - CONSTRUCTION OF FLEXIBLE PAVEMENT

Civil Engineering Department | DCC3113 : Highway & Traffic Engineering

Concept Macadam Crusher-Run Road Base

• Materials: natural or artificial aggregates
• Graded aggregate mixture: Maximum size of 75 mm

• Moistened and compacted aggregate: Layer thickness (100 mm - 150 mm)
• Advantages:

 Construction costs is low because of using only one type of aggregate

 Easily cut and trim
 Fast compaction achieved

 Less human energy usage
• Disadvantages:

 Isolation of aggregates during carried from crushing plant to the construction site
 The fine aggregate will be at the bottom, the surface becomes loose and difficult to
compact

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