Pervious Concrete VI

Last weeks blog covered a recent pervious concrete seminar and demonstration hosted by contractor-client, The Bazella Group of Allentown, PA.  This weeks blog will discuss some of the different surface finish methods used for the pervious concrete samples.

Compressor Finisher

Compressor finish is a relatively  new surface-finish method for pervious using a non-weighted pan machine, developed by Dave Mitchell of Bunyan Industries.  Immediately after the roller-screed pass for leveling, the non-weighted pan is floated several times across the surface, and provides a relatively dense yet still pervious surface.  Though John Bazella is currently doing trials with a conventional motor-mounted pan mixer, the Bunyan version used an off-machine compressor for power, and the long handled-pan allows the operator to finish without walking on the new surface.  The compressor also powers the roller-screed used for initial strike-off.

Pan-Finish

Pan-finish uses a non-weighted pan method leaves a fairly closed and level surface, almost resembling a base-course asphalt mix, and eliminates hand-troweling except for slab edging.  Low spots are easily filled in with additional fresh mix panned in, and high spots are quickly leveled by the low-rpm pan.

Bean Oil

Bean Oil is immediately used after panning, a light coat is applied by sprayer as a moisture stabilizer for the surface.  This is an eco-friendly soybean-based light oil that has universal uses.

Plastic Cover

Plastic sheeting is immediately placed over the concrete and generally left in place for 7 days.  The entire process from truck chute to roller-screed to finish, spray, and cover, is typically only about 15 minutes – a far cry from waiting for conventional slabs to gel, bleed, finish, etc.

For more information, please visit: www.forta-ferro.com