Investigation of Slant Shear Strength of a Repaired Structure Bond Due to Epoxy

Abstract

The aim of this project is to investigate the slant shear strength of a repaired structure bonded by using epoxy resin. After any natural or man-made disaster events, structures may undergo various stages of damage. To safeguard the economic as well as physical well–being of all stakeholders, proper repair and rehabilitation strategies of damaged concrete structures are required. Various studies have focused on repairing concrete members by bonding different substrates with epoxy resin. The main use of epoxy resin is to reduce the concrete use while repairing and giving at least the same strength as that of concrete mix. In this study, experiments are conducted to test the slant shear strength of repaired concrete block based on two main parameters, thickness of epoxy resin bond, and grade of concrete of the two substrates. The different grade of cylindrical slant was cast and cured for 28days. After curing, The two substrates were bound together with epoxy resin of 1mm, 2mm and 3mm thickness. The samples were kept at room temperature for one week and after a week of binding compressive test were done as per specifications given in ASTM C882. Based on the experiments, it is observed that with increase in thickness; the strength of epoxy resin also increases. Failure in the epoxy resin bond is observed when two same grades of substrates are bonded together whereas the material of lower grade of concrete fails whenever two substrates of different grades are bonded by epoxy resin.