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Findings

A

Rutting was dominant. The reason for rutting was due to the deformation of the base and specifically because the quality of the base has been compromised. The reason was not very clear, but it was expected that secondary weathering of the dolerite had taken place. It was noted that even though the same material was used in the subbase, the PI in the subbase was less due to better protection and reduced traffic loads.

B

The failures consisted of crocodile cracking observed in the continuous medium grade asphalt layer with rolled in chips (RIC), occurring randomly on all the traffic lanes constructed recently, both in the southbound and northbound direction carriageway.

C

Several isolated small potholes were found along the road which was badly damaged due to the structural pavement layers failing. Potholes formed extensively and have to be repaired often. All road distress features have resulted in the premature failure of the pavement.

D

The dominant distress along the road was crocodile cracks with associated pumping located in the wheel tracks. Some of the repairs to these distressed areas exhibit the same type of distress. The assessment of the mechanical surveys largely confirmed the observation made based on the visual assessments. It was clear that the changes in condition coincide with changes in the pavement structure. The dominant distress along the road was crocodile cracks with associated.