worldwide
that has huge potentials for concrete coarse aggregate. This study discusses the use of recycled
coarse aggregate in concrete in a repeated fashion, and investigates the fresh and hardened properties
of this green concrete type. Three different generations (1st, 2nd and 3rd) of repeated recycled concrete
were produced using 100% recycled coarse aggregate (RCA) as a replacement of natural coarse aggregate
where RCA was recycled 3 times over its life span. i.e. the 3rd generation recycled concrete was made
with RCA, which was produced after 3 repeated casting of recycled concrete with 100% RCA and then
demolishing the hardened concrete. The results show that the repeated recycled concrete experienced
slightly lower compressive strength than the control concrete; however, all mixes successfully achieved
their target strength at 56th day expect the 3rd generation concrete. Another interesting finding of this
study shows that even the 3rd generation concrete could surpass the target strength by at least 25% while
considering long term strength gain. The stress–strain curves of repeated recycled concrete are also presented
and discussed.