Page 33 - UNIT 6 - HIGHWAY MAINTENANCE

Civil Engineering Department | DCC3113 : Highway & Traffic Engineering

Bleeding

 Bleeding is presence of free bitumen binder on
the surface resulting from upward migration of
the binder

 Causing low texture depth and inadequate tyre
stone contact.
 It is most likely to occur in the wheel paths during
hot weather.

 Causes:
 Too high asphalt content
 too rich a plant mix
 improperly constructed seal coat
 too heavy prime or tack coat

 Cures:
 Sand blot
 Micro-surfacing
 Seal coat

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