Percoa pervious concrete is form poured and cured in a production facility according to pre-engineered mixtures
of
aggregates, water, and cement material in order to create void space of between 15% and 25% in the finished product.
Traffic loaded bearing properties of up to 4,500 psi .The blocks are produced with two ends having ‘keys’ or interlocked edges.
The pervious blocks are placed on a bed of storage aggregate which is
designed to store, filter, or ideally infiltrate
stormwater runoff.
Installation:
The
interlocking edges keep the blocks from shifting or settling independently. The blocks are installed by hand labor or small
equipment.
Maintenance:
Maintenance of Percoa porous concrete blocks would be similar to the required maintenance for any porous pavement
or
permeable pavers. Seasonal vacuuming removes the built-up fines that are likely to clog the material. Percoa does offer
the
benefit that if one or more blocks
become severely clogged, they can more easily be removed and replaced compared to poured in place porous concrete.
Percoa, unlike permeable pavers, does not have to replace the media in between the pavers which is an extra cost
for maintenance. Site placement to avoid sediment transfer onto the porous pavement blocks is critical for long term success.
Overview:
Percoa offers
what developers contend are a Superior alternative to cast-in-place pervious concrete and more effective drainage
than permeable
concrete pavers. The product can be cast in a variety of sizes, shapes and colors, they add, offering greater
flexibility for
civil engineers, landscape architects and contractors to design and installparking lots, driveways, sidewalks
and walkways,
plazas and patios. “Percoa has the potential to revitalize andexpand the use of pervious concrete. You know what
you are
getting, and how it will perform, because of itscontrolled production process,” notes Mary Vancura, Ph.D. of
Mendota
Heights, Minn.-based Beton Consulting Engineers, LLC. — www.percoausa.com
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