Description:
Concrete is made from rock, sand and Portland cement. Think of the cement as the glue that holds everything together. If you leave out the sand, you end up with something that looks like a big rice crispy treat. Because there is no sand to fill in all the little holes, this type of concrete allows water to go right through it.
Advantage to user:
Pervious concrete allows great freedom in landscape design. You can plant trees right next to the pervious, making for very attractive parking areas and walkways.
Savings to pocketbook:
Since water drains right through pervious concrete, you don’t need to engineer for drainage or build costly retention ponds.
Savings to the planet:
Pervious concrete is much cooler than asphalt, reducing the “heat island effect.” Pervious concrete allows natural groundwater recharge instead of going into storm drains.
