Bond stress characteristics on circular concrete filled steel tubular columns using mineral admixture metakaoline

Concrete filled steel tubular columns are becoming widely used in engineering. This paper studies the bond stress characteristics in concrete filled steel tubular columns using mineral admixture (metakaoline). And also this paper presents the effects of change in length of the tube, diameter of the tube, strength of the infill concrete and percentage variation of metakaoline in concrete. CFT applications in buildings and the importance of bond stress are studied. This paper presents the bond carrying capacity of twelve conventional concrete and thirty six metakaoline in concrete filled steel tubular columns. The effect of metakaoline in concrete was also investigated. The bond carrying capacity is interrelated with slip between steel and concrete interface. From the experimental study it was found that the bond stress decreases with increasing in percentage of metakaoline. An experimental study is described and evaluated.