Understandings on the Performance of Concrete-Filled Steel Tube with Different Kinds of Concrete Infill

Table 1

Details of mix proportions.

Type of concrete	Cement (kg)	Fine aggregate (kg)	Coarse aggregate (kg)		Water (lit)	Other ingredients
			20 mm (60%)	12.5 mm (40%)
Conventional concrete(CC)	437.78	650.25	661.5	441	197	Nil
Steel fiber-reinforced concrete (SC)	437.78	650.25	661.5	441	197	Hook type steel fibers 0.75% by volume of concrete (18 kg)
Geopolymer concrete (GC)	Nil	650.25	661.5	441	Nil	FA and GGBS each 50% by weight of cement, 5 M NaOH and sodium silicate (197 litres)
Expansive cement (EC)	437.78	650.25	661.5	441	197	Cebex 100, 0.45% by weight of cement