The mechanical properties of various various polymer concrete (PC) sys
tems using unsaturated polyester resins based on recycled polyethylene
terephthalate (PET) plastic waste were evaluated. Resins using recycl
ed PET offer the possibility of a lower source cost of materials for m
aking useful PC products. Also, the recycling of PET in PC would help
solve some of the solid waste problems posed by plastics and save ener
gy.