Fig. 7 shows the density of the concrete specimen developed
using different proportions of GRP waste powder. The density of
the concrete was studied under 28 days of curing in water and in
the oven. Results revealed from the present study that the mean
density of concrete developed with 5% and 15% GRP waste powder
under water curing was 2340 kg/m3 and 2270 kg/m3 respectively.
However, the mean density of concrete made with 30% and 50%
GRP waste was 2220 kg/m3 and 2120 kg/m3 respectively. Due to the
synergetic behaviour between polymer and cementations matrices,
the impact on the performance of materials largely affects the
weight ratio.