Abstract:
The aim of this research study is to develop an efficient and cost effective confining
technique for compression elements in Pakistan using indigenous materials and local
skills. The most common technique for concrete confinement is jacketing by either
reinforced concrete, special concrete, steel, composite material and FRP. The issues
related to current techniques are brittleness, expensive, corrosion, de-bonding and
requirement of experienced labor. In the current study Aluminum Alloy sheets along with
bolted connection are used for confinement of concrete. Aluminum alloys are becoming
increasingly prevalent in the construction industry due to their high strength and
lightweight, simplicity of fabrication, high ductility, resistance to corrosion, and
distinctive appearance. Concrete cylinders of 200 mm diameter are casted and divided
into seven categories based on the variables including height, number of layers of
Aluminum Alloy Sheet and number of bolts. All the samples are tested under uniaxial
compression. Results have shown considerable increase in ultimate strength of modified
members. It is also observed that external confinement has reduced the ductility of
members slightly. Modified samples has also shown greater initial stiffness and delayed
initial cracking. Experimental results are compared with different analytical models.
Analytical models presented by Mander (1988), Canadian Standard Association (CSA)
S806-02, Kaushik & Singh (1999), and Samaan et al. (1998) have shown close
correlation with experimental data.
