. In recent times, efforts are channeled towards limiting the impact of waste plastic
pollution on the environment. This study examines the beneficial utilization of polyethylene
terephthalate (PET) wastes, which is a non-biodegradable waste materials as a partial substitute
for sand in the production of non-load bearing hollow sandcrete blocks. The physical and
mechanical properties such as density and compressive strength of the hollow sandcrete blocks
using PET waste as a replacement for fine aggregate at 5%, 10%, 30% and 50% were determined.
Tests results show that the density of the produced sandcrete blocks decreases as the waste PET
content increases. Results showed that the density varied from 1391.33 kg/m3 for 50%PET
content to 1954.54 kg/m3 for 5%PET content, while the density of the reference sandcrete was
2002.15 kg/m3 for 7 days. The values of densities ranged between 1453.88 kg/m3 for PET 50%
and 1851.09 kg/m3 for PET 5% and the density of reference sandcrete was 1991.77 kg/m3 at 28
days. The sandcrete blocks also demonstrate a similar reduction trend in compressive strength
as the PET content increases. The compressive strength ranged between 1.140 N/mm2 for
50%PET and 2.564 N/mm2 for 5%PET content and 1.510 N/mm2 for 50%PET to 2.991 N/mm2
for 5%PET respectively, as the curing age increases from 7 to 28 days. The hollow sandcrete
block containing an optimum 5% replacement percentage of sand with PET waste showed
comparable strength to the conventional sandcrete blocks. This will help to mitigate the menace
of marine plastic pollution and promote responsible consumption
