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Evaluation of Epoxy Injection Method for Concrete Crack Repair

Sarah Griffin, Hossein Askarinejad and Brian Farrant
Department of Engineering and Architectural Studies Ara Institute of Canterbury (Christchurch Polytechnic), New Zealand

Abstract—The use of epoxy resins for repairing concrete cracks is a common method to restore cracked concrete structures. In this paper, the effectiveness of three chosen brands of epoxy which are commonly used in industry in New Zealand to repair cracked concrete beams are investigated. Multiple unreinforced concrete beams were tested before and after epoxy repair under vertical loads (flexural load) to determine the effectiveness of the epoxy to restore the structural strength or continuity of the beams. The tests were conducted using the third-point loading method applying a constant bending moment to the middle segment of the beam span. The results showed that the performance of the repaired beams varies depending on the epoxy type and application methods. It is demonstrated that the viscosity of epoxy is critical to ensure full bonding and in turn reinstating the capacity of the cracked sections.
Index Terms—Concrete crack, epoxy injection, flexural testing

Cite: Sarah Griffin, Hossein Askarinejad, and Brian Farrant, "Evaluation of Epoxy Injection Method for Concrete Crack Repair," International Journal of Structural and Civil Engineering Research, Vol. 6, No. 3, pp. 177-181, August 2017. doi: 10.18178/ijscer.6.3.177-181