Page 35 - UNIT 6 - HIGHWAY MAINTENANCE

Civil Engineering Department | DCC3113 : Highway & Traffic Engineering

Delamination

 Delamination is the loss of a discrete and large
(minimum 0.01 square meter) area of the
wearing course.

 Usually there is a clear delineation of the
wearing course and the layer below.
 Other terms : Peeling, surface lifting, seal break ,
flaking

 Causes :
 Aggregate not spread immediately
 Asphalt may have cooled to much
 Aggregate too dusty or too wet when
spread
 Not rolled immediately after placing it
may not become seated

 - Steel-wheeled roller alone was used for
 compaction
 - Open traffic too soon after application
 Cures :
- Hot coarse sand spread over affected areas
- Rolled immediately after spreading with a
pneumatic-tired roller

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