PCC Airfield Pavement Response During Thaw-Weakening Periods
Table 1. Pavement structures at Central Wisconsin Airport
Outagamie County Airport (OCA)
FIELD INSTRUMENTATION AND TESTING PROGRAM
ENVIRONMENTAL DATA ANALYSIS
FWD DATA ANALYSIS
Figure 8. Location of FWD sensors across joints and corner of a PCC slab
Table 3. Types of FWD tests conducted
Table 4. Pavement surface temperatures (C) at times of FWD tests
Bearing capacity analysis
Figure 10. Changes in basin area during spring thaw at Central Wisconsin Airport
Figure 11. Changes in ISM during spring thaw at Central Wisconsin Airport
Central Wisconsin Airport
Backcalculation of layer moduli
Figure 15. Effect of PCC Modulus on WESDEF absolute error (OCA)
Figure 16. Effect of PCC modulus on change in subgrade modulus from WESDEF during spring thaw at Outagamie County Airport
Table 6. Backcalculated modulus at CWA using WESDEF
Table 7. Effect of change in PCC modulus on base and subgrade modulus
Figure 19. Change in base course modulus during spring thaw
Figure 21. Typical backcalculated PCC modulus from ILLIBACK (OCA)
Figure 22. Relationship between measured total basin area and calculated subgrade modulus
Figure 25. Relationship between total basin area and subgrade modulus at Outagamie County Airport and Central Wisconsin Airport
Figure 25. Continued - SR96_120029
Table 8. Gear loading for the MD-DC9 and Boeing 757
Figure 29. Amount of damage during spring thaw at Central Wisconsin Airport
Table 10. Ratio of maximum horizontal tensile stress to flexural strength during spring thaw
Figure 31. Amount of damage during spring thaw at Outagamie County Airport
Figure 33. Effect of the coefficient of subgrade reaction, k, on the horizontal tensile stress at the bottom of the PCC layer
LOAD TRANSFER EFFICIENCY (LTE)
Figure 37. Load transfer efficiency across a joint
Figure 38. Placement of FWD sensors for load transfer efficiency test
Table 11. Joint transfer efficiencies at Central Wisconsin Airport
Table 12. Joint transfer efficiencies at OCA
Figure 40. Change of transverse joint efficiency with surface temperature
Figure 42. Change in transverse joint transfer with time on taxiway B
Figure 45. Relationship between JTE and LTE for transverse joints
PROPOSED PAVEMENT EVALUATION PROCEDURE
LITERATURE CITED - SR96_120044
Report Documentation Page - SR96_120045
SR96_12
Table 1. Pavement structures at Central Wisconsin Airport
Outagamie County Airport (OCA)
FIELD INSTRUMENTATION AND TESTING PROGRAM
ENVIRONMENTAL DATA ANALYSIS
FWD DATA ANALYSIS
Figure 8. Location of FWD sensors across joints and corner of a PCC slab
Table 3. Types of FWD tests conducted
Table 4. Pavement surface temperatures (C) at times of FWD tests
Bearing capacity analysis
Figure 10. Changes in basin area during spring thaw at Central Wisconsin Airport
Figure 11. Changes in ISM during spring thaw at Central Wisconsin Airport
Central Wisconsin Airport
Backcalculation of layer moduli
Figure 15. Effect of PCC Modulus on WESDEF absolute error (OCA)
Figure 16. Effect of PCC modulus on change in subgrade modulus from WESDEF during spring thaw at Outagamie County Airport
Table 6. Backcalculated modulus at CWA using WESDEF
Table 7. Effect of change in PCC modulus on base and subgrade modulus
Figure 19. Change in base course modulus during spring thaw
Figure 21. Typical backcalculated PCC modulus from ILLIBACK (OCA)
Figure 22. Relationship between measured total basin area and calculated subgrade modulus
Figure 25. Relationship between total basin area and subgrade modulus at Outagamie County Airport and Central Wisconsin Airport
Figure 25. Continued - SR96_120029
Table 8. Gear loading for the MD-DC9 and Boeing 757
Figure 29. Amount of damage during spring thaw at Central Wisconsin Airport
Table 10. Ratio of maximum horizontal tensile stress to flexural strength during spring thaw
Figure 31. Amount of damage during spring thaw at Outagamie County Airport
Figure 33. Effect of the coefficient of subgrade reaction, k, on the horizontal tensile stress at the bottom of the PCC layer
LOAD TRANSFER EFFICIENCY (LTE)
Figure 37. Load transfer efficiency across a joint
Figure 38. Placement of FWD sensors for load transfer efficiency test
Table 11. Joint transfer efficiencies at Central Wisconsin Airport
Table 12. Joint transfer efficiencies at OCA
Figure 40. Change of transverse joint efficiency with surface temperature
Figure 42. Change in transverse joint transfer with time on taxiway B
Figure 45. Relationship between JTE and LTE for transverse joints
PROPOSED PAVEMENT EVALUATION PROCEDURE
LITERATURE CITED - SR96_120044
Report Documentation Page - SR96_120045
SR96_12
