Forensic Investigation into Distress of Rigid Pavement

This project consisted of various segments of approximately 9.7 miles of Portland Cement Concrete Pavement (PCCP) on Road US 64/87, located in Union County near Des Moines, New Mexico. The project was divided into East Bound Lane and West Bound Lane sections each consisting of two traffic lanes. CA was retained to identify the possible cause(s) and/or contributing factor(s) of the distress in the PCCP, as well as assess the repairs made during and after construction. The investigation included on site evaluation, photographic documentation, analysis of technical documents, among others. CA was able to identify segments of most distress associated with concrete placement and location, and the cause(s) of the distress associated with the PCCP.

Evaluation of Concrete Pavement Runway

The design and construction of an Air Force Base in Guam consisted of 10 lanes of concrete pavement runway approximately 12,600 long by 200 feet wide with overruns, ranging from 16 inches thick within the 80 feet center keel section to 12 inches thick at the outer lanes. CA’s investigation was comprised of determining the causes(s) of distress and evaluating the construction activities and repairs during the construction of the concrete pavement runway completed in 2007. The investigation included, among other things, the review and evaluation of specifications, drawings, photographs, construction reports, key construction activities, schedules, technical memorandums, expert reports, repair procedures, and relevant industry standards. Among the distress, deficiencies, and defects investigated due to the poor paving practices were problems such as, poor concrete consolidation, inadequate quality of the finished surface, failed repairs, rain damaged panels, and numerous spalls and surface defects, which represent a safety hazard due to the potential for foreign object debris damage to the aircrafts during the operation of the runway.