Fly Ash Panels

March 1, 2011

Fly ash building components

Fly ash is the waste product of burning coal that is largely comprised of carbon and contains many heavy metals. Fly ash is often combined with cement as an additive, but only up to a certain percentage of concrete may be fly ash.

Carolyn Dry has developed a method of fabricating building panels and insulation out of nearly 100% fly ash in order to sequester these heavy metals so that they do not leach out and pollute the environment. Essentially cooking the ash into a solid, Dry utilizes a flux which allows processing at lower temperatures—thus using less energy and chemicals. Components such as building panels, bricks, and insulation may be produced without the need for binders such as cement.

Contact: Natural Process Design Inc., Winona, MN, USA.

For more information, see Transmaterial 3: A Catalog of Materials that Redefine our Physical Environment


  1. Using fly ash typically results in lower early-age strengths when compared to concrete of equivalent design strength made with ordinary portland cement.

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