Experimental investigation on using mesh as confinement materials for high strength concrete columns
It is well documented that reinforced high strength concrete (HSC) columns are subject to early cover spalling, which leads to strength reduction. The need of investigation on more economic confinement materials has arisen. In order to reduce early cover spalling, a new idea has been investigated in this study. This idea is about installing relatively cheap materials such as household fiber glass fly mesh and 12.7 × 12.7 galvanised steel wire meshes in the formwork of columns. 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 S12.7WM significantly improved the load carrying capacity under both concentric and eccentric loading, but it did not significantly increase the ductility of columns for each load case. FGFM significantly improved the ductility of columns under concentric loading, but the significance decreased with the increase of eccentricity.