Airport Pavement Testing and PCR Assessments
Structural Evaluation for Runways, Taxiways and Aprons
Structural Evaluation for Runways, Taxiways and Aprons
Airport pavement managers need reliable evidence that runways, taxiways, aprons and aircraft stands can safely support the current and planned aircraft fleet. QRoad provides independent, non-destructive airport pavement testing worldwide, combining field measurements with specialist engineering analysis to assess structural capacity while limiting disruption to airport operations.
Under the current ICAO ACR–PCR methodology, the Aircraft Classification Rating (ACR) represents the relative effect of an aircraft on a pavement, while the Pavement Classification Rating (PCR) reports the pavement’s bearing strength. Reliable pavement data is therefore essential when establishing or updating a PCR, evaluating a proposed aircraft operation or planning future maintenance.
HWD Testing Under Aircraft-Representative Loads
A Heavy Weight Deflectometer (HWD) applies a controlled dynamic load that represents aircraft wheel loading. Sensors measure the resulting deflection basin at the pavement surface. These measurements can be used to evaluate load-carrying capacity, backcalculate pavement-layer stiffness and assess the response of the subgrade without damaging the pavement.
QRoad tests both flexible and rigid airport pavements. On concrete pavements, HWD measurements can also assess slab support and joint load-transfer efficiency. The results help identify structurally weak areas and support estimates of remaining structural life.
Combining HWD and GPR Pavement Data
HWD results become more valuable when interpreted together with accurate pavement-construction information. QRoad can combine HWD measurements with vehicle-mounted Ground Penetrating Radar (GPR) surveys. GPR provides continuous information about pavement-layer thickness, changes in construction and subsurface anomalies across large pavement areas.
Together, HWD and GPR provide a stronger basis for evaluating pavement performance than isolated investigation points alone. The combined results help airport engineers relate structural response to pavement construction, divide the pavement into consistent sections and focus follow-up investigation or rehabilitation where it is most valuable.
When Should Airport Pavement Testing Be Commissioned?
An airport pavement assessment is particularly valuable when updating a PCR, considering a new or heavier aircraft type, preparing a rehabilitation programme, investigating unexpected pavement distress or establishing baseline data after construction. Surveys can be planned around operational constraints and available closure windows.
Proven International Airport Experience
QRoad has completed airport pavement investigations in Europe and worldwide. At Muscat International Airport in Oman, QRoad evaluated Runway 08R/26L, associated taxiways and selected rigid pavement areas using HWD measurements and structural analysis. This practical international experience helps QRoad deliver efficient field testing and clear results for airport pavement managers, consultants and asset owners.
Frequently Asked Questions About Airport Pavement Testing
What does an HWD test measure?
An HWD measures the pavement’s response to a controlled dynamic load. The recorded deflection basin is analysed to evaluate structural capacity, pavement-layer stiffness and subgrade response. On rigid pavements, measurements can also determine joint load-transfer efficiency.
How are HWD and GPR different?
HWD measures structural response at selected test locations. GPR produces continuous profiles of pavement-layer thickness, construction changes and subsurface anomalies. Combining both methods reduces uncertainty and provides a more complete understanding of pavement condition.
Can testing be completed around airport operations?
Yes. HWD and vehicle-mounted GPR are rapid, non-destructive methods. QRoad coordinates survey planning with airport access, safety and closure-window requirements so the required measurements can be collected efficiently while minimising operational disruption.
Does HWD testing determine the PCR?
HWD testing supplies essential structural inputs for a PCR assessment. The measurements are analysed together with pavement construction information and the representative aircraft fleet to evaluate pavement bearing strength under the current ACR–PCR methodology.
What Airport Pavement Managers Receive
- Validated HWD deflection data and quality-controlled field measurements for flexible and rigid airport pavements
- Backcalculated pavement-layer stiffness, subgrade response and structural-capacity conclusions
- Slab-support assessment and joint load-transfer efficiency for rigid pavements
- GPR profiles of pavement-layer thickness, construction changes and potential subsurface anomalies
- Clear reporting for PCR assessments, aircraft compatibility, remaining-life evaluation, maintenance planning and rehabilitation