KSA’s services were engaged to determine the current weight-bearing capacity of Runway 15-33 and provide maintenance and rehabilitation recommendations for a 20-year planning horizon. The load-bearing capacities of the connecting taxiways were also assessed during this investigation.
KSA teamed with consultants to perform non-destructive deflection testing and heavy weight deflection testing to simulate and determine in-situ soil conditions. In compliance with FAA regulations for airports completing projects with federal Airport Improvement Program (AIP) or Passenger Facility Charge (PFC) grant monies, KSA determined the airport’s load-bearing capacity and assigned it pavement classification number (PCN) values.
Based on projected aircraft operations and the calculated PCN, KSA provided two projects to help phase the runway work to address the pavement deficiencies observed. The first project is to replace the existing joint sealant material and remove and replace distressed, isolated concrete panels. This will eliminate existing voids in the pavement and further protect the underlying subgrade. Full depth panel replacements, also recommended, will eliminate a key source of foreign object debris on the runway. The estimated cost for this option is $4.2M. The second project is a full reconstruction of a portion of the runway consisting of six inches of cement treated base and a 14-inch, Portland cement concrete surface. The cost for this option is approximately $2M. The connecting taxiways were structurally adequate.
Chennault International Airport
Vivek Khanna, P.E., PhD, Project Manager