Two identical PCC
slabs were constructed at the NAPTF on October 13, 2004. One slab was placed
inside the NAPTF building and the other outside the building near the south
wall. The indoor slab was placed on a 20 ft. by 20 ft. exposed area of an existing
6 in. thick econocrete stabilized base remaining from a previous NAPTF research
study. The outdoor slab was placed on a 20 ft. by 20 ft. by 18 in. thick
econocrete stabilized base and was level with the soil grade. Both slabs were
15 ft. by 15 ft. by 11 in. thick (same dimensions as the CC2 Phase II) and had
no fly ash in the cementitious mix. Similar construction procedures,
instrumentation, and monitoring techniques were applied.
Each slab
was wet-cured for 68 days using burlap strips, timed soaker hoses, and plastic
sheet coverings. All equipment and coverings were then removed.
