EFFECT OF PARTIAL REPLACEMENT OF COARSE AGGREGATE BY JHAMA CLASS BRICK IN CONCRETE
Authors: Mr. G. S. Patil, Mr. P. B. Autade
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Concrete is considered the world’s most used construction material. Typical concrete mixtures are comprised of water, sand, cement and an aggregate of rock. This project focuses on the coarse aggregate in concrete. The other material will be used to replace the coarse aggregate of rock in typical concrete. This will include burn brick or Zama brick. This material was chosen because of their availability. The burn brick is available from brick manufacturing area. Also in brick-making, a large number of bricks are rejected due to nonconformity with the required specifications. One such major nonconformity is the distorted form of brick produced due to the uneven temperature control in the kiln. These rejected bricks can also be a potential source of coarse aggregate. This would not only make good use of the otherwise waste material but would also help alleviate disposal problems. This project presents the effects of Jhama Class Brick inclusion on the mechanical properties of concrete matrix in wet and hardened state properties. For checking mechanical properties of Jhama Class Brick bat based concrete used partially replacement Jhama class brick to coarse aggregate ratios 20%, 40%, 60% and 80% in M40 grade of concrete. It is observed that workability decreased with replacement of coarse aggregate. The Compaction factor observed as 0.92, 0.899, 0.88, 0.87 and 0.85 with varying percentage replacement of coarse aggregate by Jhama class brick bat as 0%, 20%, 40%, 60% and 80% respectively. The compressive strength of Jhama Class Brick bat based concrete used with partially replacement Jhama class brick to coarse aggregate ratios 20%, 40%, increased over conventional concrete about 6.08%, 10.02% for 3 days and 9.23%, 12.08% for 7 days and 10.02%, 11.95% for 28 days. If further increased in the percentage of replacement up to 60% and 80%, the strength was decreased by 3.73% and 8.16% respectively for 3 days and 5.69%, 9.25% for 7 days and 2.72%, 6.87% for 28 days cured cube specimen respectively. The Split Tensile and Flexural Strength of this concrete increases with 5.26%, 8.68%, and 2.74%, 4.76% respectively over plain concrete for the replacement 20% and 40% and decreased with 3.94%, 12.1% and 3.16%, 7.5% for the replacement 60% and 80%.