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

Table 4

Details of CFST column specimens.

Test details	Specimen ID	Diameter (mm)	Length (mm)	Thickness (mm)	Grade of steel (MPa)	Grade of concrete (MPa)	Number of specimens
Test for bond strength	CCFST	88	500	4	292.5	33.68	6
	SCFST	88	500	4	292.5	33.89	6
	GCFST	88	500	4	292.5	33.89	6
	ECFST	88	500	4	292.5	34.70	6
Test for load carrying capacity under axial compression	CCFST	75	750	1.6	281	33.68	6
	SCFST	75	750	1.6	281	33.89	6
	GCFST	75	750	1.6	281	33.89	6
	ECFST	75	750	1.6	281	34.70	6

CCFST—conventional concrete-filled steel column for bond strength SCFST—steel fiber-reinforced concrete-filled steel column for bond strength; GCFST—geopolymer concrete-filled steel column for bond strength; ECFST—expansive concrete-filled steel column for bond strength.