Sustainable Utilization of Dumped Concrete Wastes as Fine Aggregates in Concrete – An Experimental Study

Dumped construction waste (municipal solid waste) is a major threat to the environment in recent times due its abundance generation resulting from increased activities. Perhaps, scarcity of materials also alarming urbanization necessitating an alternative suitable material. Concerning above complications, this research encompasses sustainable use concrete fractions as replacement for natural fine aggregate (NFA) termed recycled (FRA). However, FRA disrupts properties weak interfacial transition zone (ITZ) ensuing adherence cement particles and finer dust particles. This study investigates effective utilization through mortar mixing approach (MMA) technique with varying percentages FRA. The optimum proportion substitute NFA was observed be 30%, increase strength by 7.85%, while it decreased 23.5% 100% at 28 days. Through MMA, 9.93%, 19.45% stiff matrix developed result MMA tends strengthen ITZ improve concrete.