Impact of nano-modified epoxy on cfrp-strengthened concrete bond in aggressive environments

Fernando, Nirthiha 2024. Impact of nano-modified epoxy on cfrp-strengthened concrete bond in aggressive environments. MPhil Thesis, Cardiff University. Item availability restricted.

Preview	PDF - Accepted Post-Print Version Download (4MB) | Preview
	PDF (Cardiff University Electronic Publication Form) - Supplemental Material Restricted to Repository staff only Download (3MB)

Abstract

The debonding of Carbon Fibre Reinforced Polymer (CFRP) from concrete; is one of the major issues in the civil retrofitting industry. Saline water and elevated temperature have been identified as couple of many reasons which could encourage debonding. This dissertation presents a research effort aimed at identifying the failure mechanisms within this polymer-concrete interface and establishing innovative strategies to enhance epoxy resin ( the polymer) performance using nanomaterials for the development of nanohybrid adhesives. The primary objective behind the addition of nanomaterial is to fortify the interfacial bond strength between CFRP and concrete, enhancing its durability in aggressive environmental conditions. To achieve this goal, a comprehensive review of prior research on nanohybrid adhesives was conducted, to assess the influence of various nano particles on composite performance. Among the nanomaterials investigated graphene nano platelets (GNP) at concentrations of 0.25 wt.% and 0.5 wt.% and NS at concentrations of 0.25 wt.% and 0.5 wt.% exhibited significant potential for enhancing resin bonding capacity. Double shear test on externally retrofitted CFRP strips on concrete cubes using the proposed nanohybrid epoxy mixes were performed. From the experiment it was observed that, 0.25 wt.% GNP mixed epoxy resin outperformed neat epoxy by 181% and it also showed better performance in stiffness as well.

Item Type:	Thesis (MPhil)
Date Type:	Completion
Status:	Unpublished
Schools:	Engineering
Uncontrolled Keywords:	1) CFRP 2) Nano-hybrid resin 3) Graphene 4) Concrete 5) Modified epoxy 6) Durability performance
Date of First Compliant Deposit:	2 August 2024
Last Modified:	05 Aug 2024 08:46
URI:	https://orca.cardiff.ac.uk/id/eprint/171106

Actions (repository staff only)

Edit Item