This is further supported
by an earlier study, where the addition of polymeric materials
with cement, during hydration, enabled polymer film
formation to occur which resulted in a co-matrix under which the
polymer was intermingled with cement hydrate under heating
condition [5]. In this study, GRP waste powder was a combination
of polymer and glass fibre, and due to the presence of polymeric
compounds, the compressive strength of oven cured specimens
might have shown higher strength over water cured specimens.
The increase in the compressive strength of concrete with GRP
waste application under oven curing may be due to the hydration
process in which the polymeric compound in GRP waste and
cement might have formed a polymeric film under oven curing at
above 40 C.