Experimental Study on Eco-Friendly Low Cost Concrete

To produce low cost concrete by blending various ratios of manufactured sand with used foundry sand & to reduce disposal and pollution problems due to used foundry sand. It is most essential to develop profitable building materials from foundry sand. The innovative use of used foundry sand and manufactured sand in concrete formulations as a fine aggregate replacement material was tested as an alternative to traditional concrete. The fine aggregate has been replaced by 95%, 90%, 85%, 80% and 70% of manufactured sand and used foundry sand is used accordingly in the range of 5%, 10%, 15%, 20% & 30% by weight for M-30 grade concrete. Concrete mixtures were produced, tested and compared in terms of strength with the conventional concrete. These tests were carried out to evaluate the mechanical properties for 7, 14 and 28 days. As a result, the compressive strength and split tensile strength increased up to 20% addition of used foundry sand with 80% manufacturing sand. The compressive strength is increased by 28% and split tensile strength is increased by 33% as maximum. Keeping all this in view, the aim of investigation is the behavior of concrete by fully replacing fine aggregate (river sand) with different proportions of manufacturing sand and used foundry sand in concrete by using test like compression strength and split tensile test.