Hosein Pajouhan, - Master's Degree in Civil Engineering - Structure
Meysam Memar - Department of Civil Engineering, Faculty of Engineering, Zand Institute of HigherEducation, Shiraz, Iran
Davood Ghaedian - Department of Civil Engineering, Eghlid branch, Islamic Azad University, Fars,Iran,

Today, the use of plastic products has increased, and for this reason, the disposal of this plastic waste has become a big problem and has caused many environmental problems. A large part of this plastic waste consists of plastic bottles, which are made of polyethylene terephthalate (PET). In this research, three different lengths of ۱, ۲, and ۳ cm polyester fibers (PF) obtained from recycling plastic or PET bottles were used with a fixed percentage of ۱% by weight of cement as an additive, with a fixed ratio of water to cement in concrete and with ۴ The mixing plan of ۱۲ different concrete samples was made. The compressive strength of concrete was investigated. The lengths of ۱, ۲, and ۳ cm of polyester fibers have increased the compressive strength of concrete by ۴%, ۰.۱%, and ۱۵%, respectively.

Polyester fibers, Polyethylene terephthalate (PET), Compressive Strength of concrete, environmental problems