Abstract
The amount of construction and demolition waste has increasedconsiderably over the last few years. Crushing concrete to producecoarse aggregate for the production of new concrete is one commonmeans for achieving a more environment-friendly concrete. Thisexperimental study demonstrates the mechanical properties of concretecontaining recycled concrete aggregate (RCA) subjected to different firedurations. In the experimental work, the fresh concrete properties (slump test) and the hardened concrete properties, (compressive strength,splitting tensile strength, flexural strength and modulus of elasticity)were carried out. A total of thirty concrete mixes with different cementcontents (300, 350, and 400 Kg/m3) at w/c ratio (0.5) were made and thepercentage of substitution of natural concrete coarse aggregate by therecycled concrete coarse aggregate subjected to fire durations (1,2 and 3hours) at fire temperature (600oC) was (0%, 25%, 50% and 100%). Inthe process of mixing, equal consistence among all concrete mixes wasachieved. The obtained results indicate that the recycled coarseaggregate subjected to fire can successfully be used for makingstructural concrete.
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