POLYETHYLENE TEREPHTHALATE (PET) BOTTLE WASTES POLYMER TILES:
WEAR-ABRASION RESISTANCE AND MECHANICAL PROPERTIES
Abstract
Managing plastic waste is a global challenge that challenges our
ecosystem’s health due to its high production rate and
non-biodegradability. However, it is necessary to ensure that PWs are
properly managed to reduce the environmental pollution associated with
their incineration and dumping in landfills. This study explores the
possibility of utilizing polyethylene terephthalate (PET) waste bottles
and river sand to produce floor tiles. The flammability, abrasion
resistance, mechanical strength, and strong acid/base resistance of the
produced PET-based floor tiles were investigated as well as the
micro-structural interface of the PET plastic waste and sand. The PET
waste was used at different proportions (100 %, 90 %, 70 %, 50 %,
and 30 %) by sand weight. The assessment of the materials’ physical and
mechanical properties has shown that, in terms of material density,
strength, abrasion, and flame resistance, the floor tiles produced with
30% PET content performed better than those produced with the other PET
contents. It showed the highest compressive strength value (19.72
N/mm2). The observed compressive strength values in this study were
significantly higher than the recommended 28-day residential concrete
value of 17 N/mm2; p<0.05. From the obtained results, the PET
floor tiles showed poor water absorption performance compared to pure
cement and ceramic floor tiles (The lowest water absorption value of
0.12 % was found in tiles made of 100 % PET waste). Microscopic
analysis of the interface region (plastic-binder) showed adhesion
between the plastic and sand components of the PET-based floor tiles, as
well as voids in direct proportion to the PET content. The PET floor
tiles also showed good resistance to acid and base solutions of
different strengths. In conclusion, PET waste bottles can be used as
cement replacement to produce durable and abrasive resistant floor tiles
for both residential and commercial uses.