Utilization of Waste Materials in Concrete Filled Steel Tubular Columns

Abstract

The idea of this particular study is to utilize waste materials in an effective manner so as to give strength to tubular sections. Steel-Concrete composite construction has emerged as one of the fastest methods of construction in India. The inherent advantage of the steel-concrete composite section lies in that the two principal elements-the steel and the concrete are normally used in a manner so that full potential of both may be realized and the best utilization of their respective properties can be made. In this paper, an attempt was made with steel tubular columns in-filled with plain concrete, partial replacement of fine aggregate by fly ash & quarry dust and coarse aggregate by rubber, slag from steel industry, granite and construction & demolition (C&D) debris concrete. The column specimens are to be tested under axial compression to investigate the effects of waste materials. The effects of steel tube dimensions and the strength of concrete are examined. 24 specimens were tested with strength of concrete as 20 MPa and D/t ratio 23.65. The columns were 113.5 mm outer dimension and 4.8 mm in thickness are 300, 600 & 900 mm in length. The test results are to be compared with the values predicted by Eurocode4, Australian Standards and American Codes and new theoretical models will be suggested for the design. From the test results it was observed that the load carrying capacity of steel tubular columns filled with various waste materials concrete is greater than the conventional concrete.