EXPERIMENTAL INVESTIGATION ON SUSTAINABLE STABILIZED BUILDING BLOCKS WITHOUT CEMENT STABILIZER
Keywords:
Fly ash, Bottom ash, River sand, Chemical stabilizer, Compressive strength test, Water absorption test, Initial rate of absorption test and Efflorescence test.Abstract
In the growing concern of awareness regarding sustainable building material, Stabilized sustainable building blocks gives the view of energy efficient, cost reduction, environmental friendly materials and overall contribution of the sustainable development. Above to this it is eco-friendly bricks which save environmental damage caused by cement based fly ash bricks which release enormous amount of carbon di-oxide in environment, which is almost equal to the production of cement. In the present investigation a stabilized sustainable building block specimen is cast using fly ash, clay, river sand and chemical stabilizer. Some of the chemical stabilizers available for making the blocks are Di-Ammonium Phosphate, Ammonium Phosphate, Polyvinyl Alcohol (PVA), Starch, Dextrin, etc.,. DiAmmonium Phosphate and Ammonium Phosphate chemical stabilizer are eco-friendly and easily available when compared to the above mentioned chemical stabilizer, hence the blocks are made by using it. The blocks are made by varying mix composition of clay, fly ash and river sand as 1:1:2 and 1:2:1 with addition of gypsum about 0.5%and 1% and chemical stabilizer are in ratios of to dry weight of fly ash and clay as 2.5%, 5%, 7.5%, 10% and 12.5% respectively. The brick specimens are cast using standard brick mould of size 19cm x 9cm x 9cm and are compacted using table vibrator. Totally 32 specimens are casted. The cast specimens are cured by air curing and tested for the compressive strength and the results are obtained.
