"Biofly brick": engineering reuse of fly ash and sewage sludge wastes

Two of the greatest solid waste disposal problems are fly ash emitted from power plants and sewage sludge generated from municipal waste treatment plants. In an effort to introduce beneficial disposal alternatives, it was hypothesized that these waste products could be combined to produce a solidified material suitable for use in brick making. It is an innovative approach in solid waste reuse technology. This research describes detailed laboratory investigation of small specimens with different proportions of fly ash, sewage sludge and clay/shale to determine the physical suitability of the mixtures and viability for use as a brick to be called "Biofly Brick".