This study investigated the effect of replacing natural dune sand with fine recycled concrete aggregates (fRCA) produced using real concrete construction and demolition waste (CDW) and with a maximum particle size of 1.18 mm on the fresh and hardened properties of concrete. Concrete with w/b ratios of 0.45 and 0.60 was produced. Natural fine aggregates comprised of a 50/50 mix of dune sand and crusher dust. fRCA replaced the dune sand portion of the natural fine aggregates by 0%, 30%, and 50% of total natural fine aggregates by mass. Results showed that workability of fresh concrete was reduced as fRCA replacement level increased while hardened properties of concrete, including compressive strength and various durability indicators - gas permeability, sorptivity, and water-penetrable porosity - were comparable at all replacement levels for each w/b.