The use of PET pellets in cement stabilized compressed earth bricks

摘要

This research recycled Polyethylene Terephthalate (PET) material by grinding it to small pellets. Compressed earth bricks of size 100 × 140 × 140 mm were stabilized with cement at 0%, 2.5%, 5%, 7.5% and 10%. The PET pellets were mixed with each stabilized compressed earth brick at 0%, 5%, 10% and 15%, They were designated as C_1, C_2, C_3, and C_4 respectively and used for compressive test; other sets of compressed earth bricks of size 100 × 140 × 240mm were also stabilized with cement at the same percentage and mixed with the PET pellets and designated as B_1, B_2, B_3, B_4 respectively. These sample were used for flexural strength test. The compressive strength test result of all the samples without pellets ranged between 0.86-5.71 N/mm~2, while samples that contained pellets ranged between 0.8-3.8 N/mm~2 at 28 days. The work concluded that cement stabilized earth bricks can be mixed with 5% PET pellet.