Masonry Magazine April 1994 Page. 39
The entire job was mechanically placed by Precise Paving based in West Palm Beach, Florida. Bob Goosens, president of the company, stated that productivity using mechanical installation equipment averaged about 4500 square feet per day. This average includes placing and screeding the bedding, as well as the pavers. The 4 inch x 8 inch pavers were supplied by Paver Systems of West Palm Beach, Florida.
The idea of using pavers in the Cayman airport was introduced by Geoff Whitcher of Paving Systems International in Dallas, Texas. The Cayman airport authority was no stranger to pavers. In the 1980's, Whitcher introduced and constructed their first application of pavers, 10,000 square feet, on an aircraft parking area in an airport on Cayman Brac, one of the smaller Cayman Islands. Whitcher later won the contract to install 260.000 square feet at Dallas/Fort Worth International Airport in Dallas, Texas, in 1990.
The proposal to use concrete pavers was reviewed and eventually accepted jointly by the Cayman Airport Authority and the design engineers. Two engineering firms, Tomlinson Engineering on Grand Cayman, and Roy D. McQueen Associates of Oakton, Virginia, viewed pavers as means to save their client money. Project estimates showed rigid concrete to be higher than pavers. Asphalt was not considered because it would likely suffer from static indentations imposed by wheels from the Boeing 727s, 737s, 757s and MD-80s in the airport. Concrete pavers saved the client money, while providing the durability and resistance to fuel spills.
At the development of the project, the Concrete Paver Institute advised the design engineers on the specifications and details. Further assistance was provided in evaluation and inspection of the project while it was being built, as assurance to the engineers and client.
Over 475,000 pavers were placed in a rectangular herringbone pattern over coarse bedding sand. Since the bedding sand was expected to take heavy wheel loads from the aircraft, it was evaluated for hardness.
The existing asphalt used as the base varied between 5.5 inches and 9 inches (135 mm and 225 mm). 7 inch (175 mm) crushed stone base supported the asphalt. The thickness of the base was established by the design engineers using the FFA airfield design and for flexible pavement and layered elastic analysis.
REPRINTED, with permission from the Concrete Paver Institute.
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MASONRY-MARCH/APRIL, 1994 39