Document Type : Regular Article


1 Materials Engineering Department, University of Technology Baghdad, Iraq

2 material engineering, faculty of engineering, University of Technology, Baghdad, Iraq


In order to create environmentally friendly products, this article focuses on reducing plastic waste by recycling polyethylene terephalate (PET) bottles (Green materials). Depolymerized polyethylene terephthalate (DPET) is created by combining PET with ethylene glycol and magnesium oxide (MgO) at a moderate temperature until the mixture reaches 179 oC (ethylene glycol's boiling point) for 40 to 50 minutes. This process first breaks down the polymer into a monomer. Second, bitumen is combined with plastic (either PET or DPET) to create modified bitumen (MB), then  modified bitumen is mixed with sand, silica and gravel in order to produce friendly and sustainable construction materials .  Bricks have been produced from mixing the modified bitumen with percentage (10-20)% ,sand in percentage (50-60 ) % and gravel in percentage (30)%. The characterization was carried out for the bricks in two steps : The first was to examine the modified bitumen to determine the best ratio that could be used in the mixture. The hardness test showed the best ratio of modified bitumen in percentages (60% of bitumen and 40% of PET or DPET) percentage is due to the formation of a functional group between bitumen and plastic which has appeared with FTIR characterization .
Secondly, the compressibility of the mixture was fully examined and the results showed the best compressive strength  in 20% of modified bitumen with PET and 18% of modified bitumen with DPET. The compressive strength value is 7MPA and 6.9 MPA respectively. Finally , the recent results are compared with the previous research, and the results showed a reduction in the cost as a result of the use of waste materials and an increase in compression value.