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The fast growing continuous technological development has led to enormous amount of waste, the accumulation of which is an environmental concern. The demand of natural sand in the construction industry has increased a lot, resulting in the reduction of availability of natural sand resources. Natural sand deposits are being depleted and causing serious threat to environment as well as the society. In this situation research began for inexpensive and easily available alternative material to natural sand, a sincere attempt has been made in choosing waste/used foundry sand as an alternative and as a partial and full replacement of conventional sand in the Fly ash bricks and the strength property are assessed and is compared with the conventional Fly ash bricks. When compared with CF bricks 28 days Compressive strength of NCF50 Bricks is 5% more and NCF100 is less by 35%. Water absorption capacity of NCF50 is less by 0.8% and NCF100 Bricks is more or less equal, Efflorescence for both NCF50 & NCF100 Bricks is Nil.

Effect on Replacement of Conventional Sand with Used Foundry Sand in Flyash Bricks