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Continued from page 19 Preparing for Pervious Concrete

over existing asphalt, using it as a structural base. How- ever, the unique quality of UltraLot Whitetopping is its own flexibility. By nature asphalt is flexible, but con- crete is not. “With frost and thaw cycles, you will get a

difference in movement between the two unless you can create a flexible concrete through mix design and pan- elization,” Rabine says. Rabine admits this product may not take over the park- ing lot industry, he does believe it is a great cost-com- petitive pavement option. “You are using the asphalt base below that you would normally have taken out if you have to put concrete in….You get value out of the existing pavement that is below it.” In order to introduce new products such as UltraLot Whitetopping, the Rabine Group previously had tried to showcase them at various sites. “We own eight of- fice/industrial properties that our business is run from in the Midwest,” he says. “But to get clients out there to

see them is really not practical. They are spread out all over the region so it is not that efficient to get someone to fly into a local airport to see your headquarters.” Buying an office building in Schaumburg with a 450 stall parking lot around it a year ago provided the solu- tion. The building, which will become an environmen- tally-friendly LEED certified facility, has a boardroom with an auditorium and a unique test site and showroom outside. They ripped out half of the parking lot and milled the surface off the remaining half, then divided it into test sections where they laid down a variety of pave- ment products, using a variety of techniques. “We put down 15 different types of pavements in that parking lot,” Rabine says. “We did full-depth asphalt to full- depth concrete, everything from 1.5-3 inch overlays in asphalt to 1.5-3 inch overlays in concrete, UltraLot Whitetopping. Then we did two panels of pervious con- crete and two panels of porous asphalt. We left one part of the concrete totally undone where we are trying out sealers, crack sealers, patching methods, and striping coatings.” This has become the Rabine Academy Pave- ment Design Center.

Continued on page 33

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