Fly Ash - Fly Ash Reuse

Fly Ash Reuse

There is no U.S. governmental registration or labelling of fly ash utilization in the different sectors of the economy - industry, infrastructures and agriculture. Fly ash utilization survey data, acknowledged as incomplete, are published annually by the American Coal Ash Association.

The ways of fly ash utilization include (approximately in order of decreasing importance):

• Concrete production, as a substitute material for Portland cement and sand
• Embankments and other structural fills (usually for road construction)
• Grout and Flowable fill production
• Waste stabilization and solidification
• Cement clinkers production - (as a substitute material for clay)
• Mine reclamation
• Stabilization of soft soils
• Road subbase construction
• As Aggregate substitute material (e.g. for brick production)
• Mineral filler in asphaltic concrete
• Agricultural uses: soil amendment, fertilizer, cattle feeders, soil stabilization in stock feed yards, and agricultural stakes
• Loose application on rivers to melt ice
• Loose application on roads and parking lots for ice control
• Other applications include cosmetics, toothpaste, kitchen counter tops, floor and ceiling tiles, bowling balls, flotation devices, stucco, utensils, tool handles, picture frames, auto bodies and boat hulls, cellular concrete, geopolymers, roofing tiles, roofing granules, decking, fireplace mantles, cinder block, PVC pipe, Structural Insulated Panels, house siding and trim, running tracks, blasting grit, recycled plastic lumber, utility poles and crossarms, railway sleepers, highway sound barriers, marine pilings, doors, window frames, scaffolding, sign posts, crypts, columns, railroad ties, vinyl flooring, paving stones, shower stalls, garage doors, park benches, landscape timbers, planters, pallet blocks, molding, mail boxes, artificial reef, binding agent, paints and undercoatings, metal castings, and filler in wood and plastic products.