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N. Balasubramani ¹, R. Thenmozhi ²

Affiliations
1 Department of Civil Engineering, Sri Ramakrishna Mission Vidyalaya Polytechnic College, Coimbatore 641 020, Tamilnadu, IN
2 Department of Civil Engineering, Government College of Technology, Coimbatore, 641 013, Tamilnadu, IN

Abstract

This paper presents the experimental study of six Double Skinned Hollow Concrete Filled steel Tubular (DSHCFT) columns consisting of PVC inner and mild Steel outer pipes in-filled with Self Compacting Concrete (SCC). The grade of SCC and the yield strength of steel used were M35 and 250 MPa respectively. The Columns were tested for axial load and Loaddeflection, Ultimate compressive strength were studied and reported. The experimental results are verified with European Code (EC4) and found as conservative. The PVC tube is found as a reasonably suitable alternate material for moderately loaded DSHCFT columns.

Keywords

DSHCFT, Ductility, Load – Deflection, PVC Inner-Steel Outer, SCC, Ultimate Load.

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R. Thenmozhi ¹, N. Balasubramani ²

Affiliations
1 Deptt. of Civil Engineering, Government College of Technology, Coimbatore, Tamil Nadu, IN
2 Deptt. of Civil Engineering, Sri Ramakrishna Mission Vidyalaya Polytechnic College, Coimbatore-641 020, T.N., IN

Abstract

This paper aims to focus on the possibility of using 10% of coconut shell aggregate (CSA) replaced for coarse aggregate in self compacting concrete (SCC) containing 25% fly ash (FA) prepared using additives of super plasticizer and viscosity modifying agent. The SCC with normal aggregate containing FA 25% is taken as (SCC), a reference and in the same mix, 10% of coconut shell aggregate is replaced for coarse aggregate. The fresh and hardened properties in both the SCC (M25) and SCC-CSA are studied in laboratory experiments. The possibility of potential use of coconut shell being one of the major agro-wastes in South India, as partial replacement of coarse aggregate in making a special concrete such as SCC-FA-CSA in structural component is verified and discussed. The research encourages potential use of the agro-waste known as CSA. It instantaneously reduces the consumption of normal natural stone aggregates apart from serving as a means of combining the CSA with abundantly available fly ash from thermal power stations and in turn help protect our mother earth and its environment by the precious minimised use of normal aggregate.

Keywords

Self Compacting Concrete, Fly Ash, Coconut Shell Aggregate, Solid Waste.

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