Enhanced strength and toughness of repurposed glass fiber reinforced adhesive joints for sewage applications

Chelot, D., Tewari, A., Kumar, S. and Upadhyaya, P. (2023) Enhanced strength and toughness of repurposed glass fiber reinforced adhesive joints for sewage applications. Journal of Adhesion, (doi: 10.1080/00218464.2023.2234292) (Early Online Publication)

Abstract

In this study, the enhancement in strength and toughness of multi-piece glass fiber reinforced plastic (GFRP)/GFRP joints was demonstrated. These joints are bonded with repurposed short glass fiber reinforced adhesive and find their application in rehabilitation of sewage pipelines. These short fibers were produced by grinding and milling the fiberglass wastes, collected during the lamination process of pipes. To study the effect of glass fiber content on the mechanical properties of the composite adhesive, short fiber composite (SFC) specimens with varied milled fiber content were tested under flexural loads. A finite element-based numerical homogenization study was carried out on a micro-mechanical periodic unit-cell representing a non-homogeneous SFC to predict the mechanical properties of the microstructure. The dispersion state of fibers and fracture surface characteristics of SFC were analyzed via scanning electron microscopy. Further, the shear strength of the adhesive with and without reinforcement was experimentally evaluated using a lap shear test. Increasing the fiber content in the adhesive transforms it from a compliant state with poor strength into a much stiffer and stronger composite with reduced strain tolerance. The optimized SFC was selected for joining the two segments of the GFRP sewage pipe using a unidirectional composite as a tongue. Subsequently, the tongue-in-groove joints (TGJs) were tested under tension.

• Item Type: Articles
• Status: Early Online Publication
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Kumar, Professor Shanmugam
• Authors: Chelot, D., Tewari, A., Kumar, S., and Upadhyaya, P.
• College/School: College of Science and Engineering > School of Engineering > Systems Power and Energy
• Journal Name: Journal of Adhesion
• Publisher: Taylor and Francis
• ISSN: 0021-8464
• ISSN (Online): 1545-5823
• Published Online: 11 July 2023
• Copyright Holders: Copyright © 2023 Taylor and Francis Group, LLC
• First Published: First published in Journal of Adhesion 2023
• Publisher Policy: Reproduced in accordance with the publisher copyright policy