Rigid Pavement Distress Mapping

The distresses observed in the rigid test items are presented in the figure below. In LRS test items, only four longitudinal cracks were observed after the initial 28 passes. After additional traffic was applied to LRS test items in March 2000, corner cracks started to develop.  The largest and smallest corner cracks were developed in HRS and LRS test items respectively. Additionally, elevation surveys were done shortly after the pavement construction and four days before the start of traffic testing with each slab elevation measured at nine points (four corners, four joints and one at the center). Results showed the presence of significant curling on February 14, 2000. The curling existence was also verified analyzing the HWD data at the centers, joints and corners of each slab. It was observed that all the pavement slabs were curled up at the corners, with the HRS slabs exhibiting the greatest amount of curling and the LRS slabs exhibiting the least amount of curling.

Crack Patterns in Rigid Test Items (Click to Zoom)

Return to Construction Cycle 1 Main Page