Strengthening of reinforced concrete short columns using ferrocement under axial loading

Abstract

Reinforced concrete columns play an important role in distributing loads from slabs and beams to foundations. As a result of time, fatigue, or other factors, the reinforced columns are exposed to deterioration, and it is required to strengthen or repair these columns. Ferrocement jacketing can be considered as an easy and cheap method which has a significant effect on strengthening members. The main objective of this research is to study the effect of strengthening short columns using ferrocement jackets. Fourteen short square columns having the same dimensions were tested under axial loading. One column was designed as a control specimen and the other thirteen specimens were strengthened with ferrocement while changing the type and number of layers. It was found that using ferrocement as strengthening method increased the strength of columns in average from 11 to 40 %. Following that, a finite element analysis was conducted using the tested column specimens to further assess the usage of ferrocement jackets for strengthening concrete columns. A modified equation was proposed to calculate the capacity of short square columns strengthened using ferrocement jackets. Comparison with experimental data showed that the proposed equation gives good correlation compared to the experimental data.

Rehabilitation of Fire-damaged Reinforced-concrete Slabs Using Ferro-cement

“…They studied the impact of the thickness of the ferro-cement layer, the number of layers of the steel mesh and the compressive strength of the ferro-cement mortar on the maximum load-carrying capacity of the tiles, deflection-load relationships and crack patterns. The results demonstrated the effectiveness of ferrocement repair and reinforcement in enhancing the performance of these slabs (Mabrouk et al, 2022;Fahmy et al, 2014;Shaaban et al, 2018;Sayhood et al, 2018). Mahmoud (2013) conducted laboratory experiments on a series of flat slabs strengthened with ferro-cement strips.…”

Comprehensive Analysis of Ferrocement-Strengthened Reinforced Concrete Beam

“…Numerous methods for reinforcing various RC structural components with ferrocement have been proposed. These include the use of ferrocement wrapping to confine RC columns [10][11][12][13], strengthening RC slabs in tensioned zones [14,15], reinforcing rigid RC column and beam joints [16,17], and the improvement in the compressive strength behavior of RC walls reinforced with [18]. High-strength cement matrices [19,20] and ferrocement with combined continuous and discontinuous micro-reinforcement, subjected to flexure, have been investigated [21,22].…”