Comparative Study on Axial Compressive Behaviour of CFST and Externally Wrapped CFRP Columns

Abstract

Concrete column fails by crushing or bucking due to axial load in order to resist failure of confinement, concrete filled steel tubular column (CFST) and carbon fibre reinforced polymer (CFRP) wrapping are used. CFST member has its consecutive progression in the construction industries due to its high load carrying capacity upgraded ductile performance, need for form work is minimized and has greater confinement effect. CFRP wrapping provides resistance towards corrosion, light weight exceptional durability, increases strength over confinement. In this work, an experimental investigation between stunt and slender concrete filled steel tubular column is compared with conventional pcc strut and slender column externally wrapped by single and double layer of CFRP. Total of 8 specimen were tested under axial compression. The parameter varied is height (750mm, 1050mm). The diameter of the column is 75mm. M30 grade concrete is cast. End support condition is hinged. For short column slenderness ratio is 40, L/D is assumed to be 10 and for slender column slenderness ratio is 60 and L/D is assumed to be 14. From this study, the influence of slenderness ratio over an effect of confinement is observed. Maximum axial compressive strength of the column is recorded and it is compared with eurocode4, AS/ACI code, IS516:1959 code. The behaviour of column both experimental and analytical results is observed.

Investigation on Mechanical Durability Properties of High‐Performance Concrete with Nanosilica and Copper Slag

“…The utilization of Fayalite slag in concrete clinker formation and the impacts of copper slag on the properties of concrete have been examined by numerous analysts [22][23][24]. A few works detailed the mechanical properties of concrete prepared using fayalite slags substitution for sand, and crushed stones show more development than ordinary cement [25][26][27]. For each huge load of copper delivered, roughly 2.2 to 3 tons of slags were created according to a logical estimate.…”

“…Additionally, it creates an interest in concrete innovation and is relied upon to work on the mechanical properties. The impact of copper slag as a partial substitution for sand on high-performance concrete was examined by different researchers [25][26][27]. As a primer work, an ideal amount of copper slag to be utilized in the research was examined and found as forty percentage substitutions is the perfect material for fine aggregate substitution.…”