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FDR Becomes Foundation for Holiday Season
 Full-depth
reclamation (FDR) with portland cement was the clear choice in the
recent rehabilitation of a 15,000 yd2 parking area at
the Hanes Mall of Winston Salem, N.C. In need of a facelift, the
parking area of JCPenney underwent a transformation just in time
for the holiday season.
The parking area, consisting of severely cracked and oxidized asphalt
surfacing, was in desperate need of repair. A regional office of
Professional Service Industries, Inc. (PSI) located in Charlotte,
N.C. decided to include FDR in the contract bid as an alternate
to the traditional “remove and replace” base reconstruction
of the JCPenney parking area. A 2-inch asphalt surface course would
provide the riding surface.
The FDR was designed for a 40 lbs/yd2 portland
cement application rate to a depth of 12 inches. When bids were
opened, FDR was the “clear choice due to its overwhelmingly
lower bid and shorter construction schedule compared to the complete
reconstruction option” said Don Brown, Project Manager for
PSI. The project was awarded to Thompson Arthur Paving of Greensboro,
N.C. who selected Propst Construction of Concord, N.C. to perform
the FDR work.
Construction work began on September 17, 2007 with the complete
pulverization of the parking lot using a CMI-Terex RS-425B. After
complete pulverization, a small amount of material was removed to
accommodate the new specified grade elevation after placement of
the 2-inch asphalt surface. Portland cement was incorporated across
the area for the next four days with a total of 300 tons being utilized.
 Proper
density and moisture levels were ensured through a QC testing and
inspection program by PSI with no problems reported. With the expectation
of needed parking for the weekend, Thompson Arthur Paving began
surfacing operations on Friday, September 21st after successful
proof-rolling was performed the day before on approximately one-half
of the reclaimed area. Even though the area had only a two- to three-day
cure, no sign of movement was reported under the fully loaded tandem
axle water truck used for proof-rolling. Further adding to the observed
stability of the FDR, no observed damage to the FDR section occurred
when a 50-ton crane sat on jacks for several hours while repairing
a malfunctioning high-mast light. Paving was completed the following
Monday after successful proof-rolling operations of the remaining
unpaved reclaimed section.
With a lower cost and timely construction schedule, FDR provided
JCPenney an alternative rehabilitation technique for a deteriorated
parking area. Holiday seasons for years to come will now have the
support of a strong and durable base created through FDR with portland
cement.
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