COMPARATIVE ANALYSIS OF MECHANICAL PROPERTIES OF EPOXY COATED AND UNCOATED REINFORCEMENT BAR

Authors : Kerem Aybar, Serdal Ünal, Ömer Karagöz, Mehmet Canbaz

Pages : 1997-2004

Doi:10.31796/ogummf.1752655

View : 30 | Download : 84

Publication Date : 2025-12-19

Article Type : Research Paper

Abstract :This study aims to enhance the mechanical and bond performance of reinforcing bars embedded in concrete by applying epoxy coatings as a protective layer against external effects. For this purpose, epoxy-coated and uncoated rebars with a diameter of 10 mm and length of 30 cm were embedded into 15×15×15 cm concrete blocks using two different methods: cast-in-place and post-installed with chemical anchoring after curing. Each specimen contained a single rebar, and mechanical tests including yield strength, tensile strength, fracture strength, reduction of area, elongation at break, toughness, modulus of elasticity, and adherence strength were conducted. The results showed that epoxy coating slightly improved mechanical properties such as yield and tensile strength, while enhancing toughness and maintaining sufficient ductility. Although a slight decrease in stiffness and plastic strain capacity was observed, the coating increased the reliability of yield behavior. Most notably, adherence strength was significantly improved by epoxy coating, particularly in post-installed specimens, where an increase of over 30% was recorded. Overall, epoxy coating proved to be an effective solution for improving both mechanical integrity and adhesion performance of reinforcing bars, especially in conditions where chemical durability and long-term performance are critical.
Keywords : Epoksi Kaplama, Donatı Çeliği, Aderans, Mekanik Özellikler, Donatı Filiz Ekimi

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