Pervious Pavement
When it Rains...
...It Drains!
Pervious Concrete Composition
Pervious concrete is a mixture of hydraulic cement, coarse aggregates (stone), water and admixtures. Pervious concrete contains little or no sand, and is sometimes referred to as a "no-fines" concrete. The cement and water forms a paste that binds the coarse aggregates together. Only enough paste is added to the mix to glue the aggregate together where they touch each other, but not enough to fill all the space between the aggregates.
A typical pervious concrete mixture will contain about 17-25% void space within the concrete. Many of the void spaces within the pervious concrete will be interconnected, forming channels that allow water and air to pass freely through the pavement structure.
