Experimental investigation on the viability of using metallic mesh as confinement materials for HSC columns
Many theoretical and experimental studies have shown that fibre reinforced polymer (FRP) composite jackets can significantly increase both the compressive strength and strain ductility of concrete columns. Due to the high manufacturing and application costs of FRP, the need to investigate new potential confinement materials has arisen. A new idea about pre-stalling inexpensive confinement material such as standard aluminium fly mesh (SAFM) and 12.7x12.7 galvanised wire mesh (S12.7WM) in the formwork of columns is investigated in this study. A total of 12 cylindrical specimens, with a length of 925 mm and 205 mm diameter, were cast and tested under concentric, eccentric, and pure bending loading. The testing results have shown that S12.7 WM significantly improved the load carrying capacity under both concentric and eccentric loading. However, S12.7WM did not significantly increase the ductility of columns for each load case. SAFM significantly improved the ductility of columns under concentric loading, but the significance decreased with the increase of eccentricity. The results indicate that significant increase in strength and ductility of concrete columns can be achieved at modest cost.