Page 29 - UNIT 6 - HIGHWAY MAINTENANCE

Civil Engineering Department | DCC3113 : Highway & Traffic Engineering

Corrugation

 A form of plastic movement typified by ripples
across the pavement surface with
wavelengths of less than 2m.

 Usually occurs at points where traffic starts and
stops.
 Causes
 An unstable (i.e. low stiffness) HMA layer
(caused by mix contamination, poor mix
design, poor HMA manufacturing)

 Excessive moisture in the subgrade

 Cures
 Remove the distorted pavement and
patch @ overlay

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