An earlier work showed that application of 9% polyester resin
(virgin materials) in recycling unsaturated polyester resins from
recycled polyethylene terephthalate (PET) plastic waste and recycled
concrete aggregates with normal fine and coarse aggregates up
to 70% attained a compressive strength of 39 N/mm2 [3]. It was
expected that the glass fibre content in GRP waste may contribute
to the increase in the reinforcement of concrete. Conversely, work
done by other researchers showed that no significant results were
recorded on the compressive strength of concrete developed with
recycled glass and about 16% strength was reduced when 20% of
Portland cement was substituted [25]. This was due to the inherent
smooth surface, poor water absorption and contamination of raw
materials which resulted in inconsistency of the concrete mix, lack
of bonding between glass particles and the cement matrix leading
to a low compressive strength. Since, the polymerisation temperature
ranges from 40 C to 110 C [18], in the present study cementmetric and GRP waste powder were blended together and were
cast as a solid monolithic structure and cured in 50 C in which it
was expected to form a polymeric film contributing to the increase
in the compressive strength of concrete when compared to water
cured samples. Hence, the present study explored possible recycling
options to improve the quality of concrete with applications of
GRP waste powder. It was anticipated that the presence of ground
glass fibre in GRP waste may contribute to an increase of concrete
reinforcement.