Ali Ghiami Bajgirani - Assistant professor, Department of civil engineering, The Institute of Higher Education of Eqbal Lahoori, Mashhad, Iran
Soroush Moghadam - Lecture, Department of civil engineering, The Institute of Higher Education of Eqbal Lahoori, Mashhad, Iran
Amir Mohammad Zoghi - M.Sc.Eng. student of structure, The Institute of Higher Education of Eqbal Lahoori, Mashhad, Iran
Farid Ghafoorian - B.S. student of civil engineering, The Institute of Higher Education of Eqbal Lahoori, Mashhad, Iran

A reduction in the performance level of reinforced concrete structures during the time under the influence of environmental factors such as corrosion, freezing, impact loading and seismic loading is inevitable. Polymer concretes depending on the type of used polymer have good mechanical characteristics like high compressive strength and strain- stress proper behavior and increase lifetime and strength against concrete environmental factors. Therefore, they can be used for strengthening and retrofitting reinforced concrete structures.This paper investigates the compressive strength of polymer concretes, strain-stress behavior, elasticity modulus and bond of polymer concrete to cement. Also is compared cubic and cylinder specimen of concrete cement and polymer with different percentages of polyester. Results showed that polymer concrete with 18% polyester has the highest compressive strength and the best strain- stress behavior and in terms of bond to concrete shows proper functioning

polyester, compressive strength, strain-stress behavior, bond