Definitions
Table 1 below contains definitions of abbreviations and acronyms used in this IDEA tool. Table 2 contains definitions of the four subgrade strength categories used in the PCN results presented for selected airports.
Table 1. Summary of acronyms and definitions. | Acronym | Definition |
| AAC | Asphalt over Asphalt Concrete |
| AC | Asphalt Concrete |
| ACN | Aircraft Classification Number |
| AGG | Aggregate |
| APC | Asphalt over Portland Cement Concrete |
| APMS | Airport Pavement Management System |
| APTech | Applied Pavement Technology, Inc. |
| ASR | Alkali-Silica Reactvity |
| ASTM | American Society for Testing and Materials |
| BIT | Bituminous |
| CL | Class |
| CTB | Cement Treated Base |
| CTS | Cold Tar Seal |
| EST | Estimate |
| FAA | Federal Aviation Administration |
| FOD | Foreign Object Debris |
| ft, FT | Linear Foot |
| HBP | Hot Bituminous Paving |
| HMA | Hot-Mix Asphalt |
| HMBP | Hot Mix Bituminous Pavement |
| ICAO | International Civil Aviation Organization |
| IDEA | Interactive Data Exchange Application |
| in, IN | Inches |
| L&T Cracking | Longitudinal and Transverse Cracking |
| lbs, LBS | Pounds |
| LTB | Lime Treated Base |
| LTD | Longitudinal, Transverse, and Diagonal |
| M&R | Maintenance and Rehabilitation |
| MTOW | Maximum Takeoff Weight |
| NPIAS | National Plan of Integrated Airport Systems |
| PCC | Portland Cement Concrete |
| PCI | Pavement Condition Index |
| PCN | Pavement Classification Number |
| PDC | Pavement Dressing Conditioner |
| PFC | Porous Friction Course |
| PMBP | Plant-Mix Bituminous Pavement |
| psi, PSI | Pounds per Square Inch |
| RCF | Repairing Crack Fill |
| RCS | Rubberized Crack Seal |
| sf, SF, SqFt | Square Foot |
| STAB/STB | Stabilized |
| STD | Standard |
| yrs, YRS | Years |
Table 2. Definitions of PCN subgrade strength categories. | Subgrade Strength Category | Definition |
| A | High (k-value >= 442 psi/in OR CBR >= 13) |
| B | Medium (221 psi/in < k-value <= 442 psi/in OR 8 < CBR <= 13) |
| C | Low (92 psi/in < k-value <= 221 psi/in OR 4 < CBR <= 8) |
| D | Ultra Low (k-value <= 92 psi/in OR CBR <= 4) |