Pervious concrete, also known as "porous concrete" is a mixture of course aggregate, Portland cement, water and little or no sand.|
A typical pervious concrete pavement has a 15-25% hardened void structure. The flow rates for water are typically around 480 inches per hour or 5 gallons per square foot per minute. The pervious concrete percolates into an open graded stone base. The thickness of the stone base layer can range anywhere from 6 inches to 5 feet deep and that is determined by testing of the soil for percolation rate. The stone sub base creates an underground detention area that allows storm water to infiltrate the soil over a large area.
Some of the benefits of pervious concrete are:
Pervious concrete has the potential to help earn credit points in the U.S. Building Council's Leadership in Energy & Environmental Design (LEED) Green Building Rating System. Other credits may be earned through the use of pervious concrete for other environmental benefits such as regional materials, recycled content & reducing heat island effect.
A few of the applications for pervious concrete are residential roads, alleys, driveways, sidewalks, trails and parking lots.
If you have any questions please call and we will be more than happy to help you with your needs for design, pervious placement or pervious maintenance.