Bond Strength Analysis of Repaired Concrete based on Polymerization of Glycoluril Formaldehyde

Abstract

The main purpose of the study is to understand the underlying bonding mechanism, which acts as an interface between the old as well as new concrete. Specimens are fabricated to measure the shear bond strength with different surface preparation. Five types of surface textures are used to estimate the bond strength such as plane, lined, waved, grid and chipped. Glycoluril serves as a bonding material in both the old and new concrete, and it is added in the proportion of 0%, 1%, 2%, 3%, and 4% in addition to the cement mixture. The key factor to be noted here is the surface preparation is the main component that increases the bond strength along with the lifetime of the structure of the concrete. When the surface preparation creates a rough surface, it helps in repairing the concrete with the help of polymerization of glycoluril formaldehyde that leads to an increase in bond strength and slant shear created. The specimen’s bond strength is measured by using a slant shear method with a period of 1, 2 and, 4 weeks of new concrete.