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72% of power generated in India is from thermal power stations. Ash content of 40%-50% in coal generates nearly 90 million tons of fly-ash every year, reaching up to 120 million tones by the year 2010. Besides water and air pollution, this disposal waste also results in excessive wastage of land.Today, there is an urgent need of wellplanned programmes for the proper management of fly-ash to protect our environment. Research and development indicates that bricks, tiles, hollow blocks etc. can be produced using fly-ash as raw material. The properties of the material made from fly-ash have have been formed to be better than the materials normally used for construction work. Besides these uses, fly-ash can also be utilized for backfilling of mines, lining irrigation canals, agriculture, aggregates in road construction etc.

Material Composition

Fly ash 60%
Sand / Stone dust 30%
Ordinary Portland Cement / (Lime+Gypsum) 10%
Total formula of material 100%

the composition may vary depending on the quality and cost of the raw material.

Properties of Conventional Clay Bricks & FLY ASH

Crushing Strength 30-80 Kg / cm2 Above 95 kg / cm2
Water Absoption 10-35% 12% Max.
Effect with Time Gets weaker & weaker due to climatic effects No EFFECT
Choice of Density Not Possible Above 1200 Kg / cm2
Mortar Saving Not uniform shape causing heavy Wastage of mortar Upto 20% less mortar is required
Plaster Saving Irregular & uneven wall surface requires thick Plastering Upto 50% lass mortar is required
Labour Saving ---------------blanck--------------------------------------- 10%
Thermal Insulations Not Good Better then Clay bricks
Breakage during Transportation 10-15% 1-2% only