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World Journal of Engineering
Research and Technology

( An ISO 9001:2015 Certified International Journal )

An International Peer Reviewed Journal for Engineering Research and Technology

ISSN 2454-695X

Impact Factor : 5.924

ICV : 79.45

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Sagar Tanwani* and Bashir Ahmed Memon


Growing demand of construction of new particularly tall buildings to accommodate the increasing population specially in urban centers around the globe has not only posed the problem of increasing consumption of natural aggregates but also created problem of dealing the demolishing waste. The best way of dealing this waste is the reuse of it in the new construction. This research work made use of this demolishing waste and prepared 90 cylinders of standard size. 50% replacement of natural coarse aggregates is done with coarse aggregates from old concrete. All the cylinders are made using 1:2:4 mix with 0.55 water cement ratio. 30 cylinders are made using no compaction whereas rest of the cylinders are made using compaction by table vibrator and rodding in equal proportion. After 28-day curing weight followed by the evaluation of compressive strength is done. The obtained results are tabulated and analyzed using trend line analysis to predict the second order equations. Independent equation is developed for each mode of compaction. The developed equations are then used to predict the compressive strength using weight of the cylinders. It is found that the predicted compressive strength is in good agreement with the experimental values with error from 0.1% to 0.25%. Based on the obtained results it is hoped that the research work will provide good estimate of compressive strength of concrete cylinders made using 50% replacement of natural aggregates with coarse aggregates from old concrete if the weight of the cylinder is available.

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