Axial Compression Behaviour Of Repair And Strengthening Of Damaged Reinforced Structural Concrete Columns Using Hybrid Ferro Geopolymer Jackets

Abstract

This research aimed at experimentally the efficacy of ferrogeopolymer jacketing for strengthening damaged reinforced concrete columns. Six column specimens (150×150×1500 mm) were subjected to axial loading 80% of their ultimate capacity to simulate varying degrees of damage. The damaged columns were then retrofitted using ferrogeopolymer jackets embedded with up to 3 layers of welded wire mesh (WWM) and expanded metal mesh (EMM). The load carrying capacity, axial deflection, and ductility indices of the retrofitted column specimens were assessed and contrasted with unconfined column specimen. The experimental ultimate load values were then corroborated by comparison with modified equations of ACI 318 and ECP 203. Regression analysis was performed to establish models between experimental and predicted results, and predicted results showed significant concordance with the experimental values. It was found that ferrogeopolymer jacketing columns substantially enhances structural integrity in terms of load carrying capacity, axial deflection and ductility indices, offering a viable alternative method for column rehabilitation.