In this paper, tile ceramic waste (TCW)1, red clay bricks (RCB) and ceramic sanitaryware (CSW) were
used as the partial replacement (14-30 wt.%) of natural limestone aggregates to produce structural
concrete. The natural and recycled aggregates were characterised, and the strength and density of
the hardened concrete were investigated after 7 and 28 curing days at room temperature. The TCW
concrete obtained the best compressive strength results (strength gain of up to 7% with 20 wt.% waste
after 28 curing days). The mechanical properties of the CSW recycled concrete were similar to those
of traditional samples, and slightly diminished with curing time and aggregate substitution, with a
maximum strength loss of 5.77% for the 30 wt.% replacement. Although the RCB concrete presented
the greatest strength loss (up to 18.4% after 7 curing days), it exhibited the best improvement of the
strength with curing time, which resulted in a strength loss of only 11% in the 30 wt.% RCB concretes
cured for 28 days. These results demonstrate the feasibility of using TCW and CSW as recycled
aggregates in structural concrete production without significantly affecting the developed recycled
concrete’s compressive strength
