WorldPaveAI Airport FWD / HWD Evaluation – back-calculation, CDF, overlay and PCR

1Airfield pavement and aircraft fleet

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Existing pavement type

Existing asphalt, all HMA layers (mm)

Existing granular base and subbase (mm)

PCC slab thickness (mm)

Base under the slab (mm)

Base type

Base modulus, held in the back-calculation (MPa)

PCC flexural strength R (MPa)

Slab size, length × width (m)

Evaluation period (years)

Share of the departures on this pavement (%)

Characteristic moduli (percentile)

FWD / HWD plate radius (mm)

Overlay P-401 modulus (MPa)

Minimum structural overlay (mm)

Asphalt includes P-401 surface and any P-403 / asphalt-stabilized base; granular includes P-209 and P-154. Use the core thicknesses where the cores were taken.

2FWD / HWD deflections

Survey date

Section boundaries (stations, comma separated, optional)

Rigid / composite: add a column loc (and optionally hp, the slab thickness in mm from cores) with C for tests at the slab centre (back-calculation) and J for joint tests (load on one side of the joint; the sensor at about 300 mm across the joint gives the load transfer LTE = d_unloaded / d_loaded). Test at a moderate slab temperature, not in strong sun, to limit curling (AC 150/5370-11B).

Stations in m (ft for U.S. files), load in kN (lbf accepted), deflections in microns or mm (mils with inch offsets d0, d12, d24 …). Test at moderate pavement temperature (AC 150/5370-11B); the asphalt modulus is used as back-calculated.

3Evaluation, overlay and PCR

Method

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