Fly Ash in Pervious Concrete - Technical Bulletin

Pervious Concrete is a zero-slump, no-fines, open graded material consisting of portland cement, fly ash, coarse aggregate, admixtures and water. The right configuration of these materials produces a product that allows water to pass though it at the rate of 12-18 gallons per minute per square foot. The void structure of pervious concrete is typically between 18% -25%.