Experimental Study of H-Shaped Honeycombed Stub Columns with Rectangular Concrete-Filled Steel Tube Flanges Subjected to Axial Load

Table 2

Concrete compositions.

Types	Mix proportion	Water ash ratio	Cement content (kg·m^−3)	fcu (MPa)
	Cement : sand : gravel : WRA : SF
A	1 : 1.111 : 2.062 : 0 : 0	0.380	487	49.50
B	1 : 1.020 : 2.062 : 0.010 : 0	0.288	548	53.17
C	1 : 1.469 : 2.869 : 0.0293 : 0.0995	0.272	437	65.60
D	1 : 1.660 : 1.871 : 0.0411 : 0.1371	0.295	474	55.69

Note. WRA = water reducing agent; SF = silica fume.