STUDY ON PROPERTIES OF CONCRETE WITH MANUFACTURED SAND AS REPLACEMENT TO NATURAL SAND

In the present investigation workability, strength and durability of concrete with manufactured sand as replacement to natural sand in proportions of 0%, 20%, 40%, 60% and 100% is studied. The experiments were conducted on M20 and M30 concrete grade with 450 specimens. Slump cone, compaction factor and vee-bee time tests were conducted to determine workability. Results showed that as replacement of natural sand by manufactured sand is increased, there is a decrease in the workability. Compressive strength, split tensile strength and flexural strength tests were conducted to determine strength of concrete. The 60% replacement showed an increase in strength of about 20% and other replacements to an order of minimum 0.93% in both the grades. The durability study is conducted by treating specimens for 30 days with 5% concentrated Hydro Chloric Acid and the concrete mix with 60% replacement has given good durable properties.