Analysis of Fly Ash and Water Treatment Plant Sludge in Brick Manufacturing

Sludge received from a water treatment plant is generated in huge quantity, which is mostly, disposed and launched directly in the water bodies, resulting a negative effect in the environment. Also, ash is produced due to burning of coal and is the industrial solid waste most generated roughly around six million tons/year. An efficient disposal of ash is always problem attributable to its large volume and harmful risks to the environment. The specific purpose of this analysis was to judge the technical potentialities of ash and sludge from a waste water treatment plant within the production of ecological bricks. The wastes water were analyzed for physico-chemical, mineralogical and morphological properties. Numerous mixtures were made ready by incorporating these industrial wastes in brick production. The results of wastes incorporation on physical properties like compressive strength and water absorption were determined. The simplest result, in terms of compression strength and water absorption, was reached by the series of bricks made with 50% soil, 20 % cement, 15 % fly ash and 15 % sludge by weight. The results showed that sludge and ash can be used as waste additives within the making of soil-cement bricks.