Construction Cycle 3 (CC3) Flexible Test Items

The main objective of Construction Cycle 3 (CC-3) was to provide full-scale test data to improve FAA thickness design procedures for flexible pavements supporting 4-wheel and 6-wheel aircraft gears. A second major objective was to use the comparative performance data for 4- and 6-wheel gear traffic from these tests to validate new alpha factors for 4- and 6-wheel gear airplanes in the ACN-PCN method.

After completion of the initial traffic testing phase (Phase 1), additional tests were performed on the used test items to satisfy various supplemental objectives:

• • Measure wheel load interaction for 4- and 6-wheel gears
  • Video recording of the pattern of failure of a flexible pavement structure being rapidly failed; and
  • Compare the number of load repetitions to failure for the same structure with and without wander. 

CC3 Pavement Construction / Cross-Section

Construction Cycle 3 (CC-3) involved the replacement of existing CC-1 test items and an existing Portland cement concrete (PCC) test strip with a series of four new flexible pavement sections with varying subbase thicknesses:

• • LFC-1: Flexible surface layer with 16-inch P-154 unbound aggregate subbase.
  • LFC-2: Flexible surface layer with 24-inch P-154 unbound aggregate subbase.
  • LFC-3: Flexible surface layer with 34-inch P-154 unbound aggregate subbase.
  • LFC-4: Flexible surface layer with 43-inch P-154 unbound aggregate subbase.

For more information on the CC3 Experiment click on one of the links in the table below.

Construction

Traffic Testing

Post-Traffic Testing