Behavior of Hollow Thin Welded Tubes Filled with Sand Slag Concrete

Table 1

Concrete composition used for filling rectangular steel profiles.

Compositions	Unit	BO	BSI	BSII
Cement CPJ 42.5	Kg/m^3	350	300	300
Water/cement
Calculated	—	0.5	0.81	0.61
Real		0.55	0.88	0.88
Sand dune 0/2.5	Kg/m^3	725.59	—	500
Sand slag granulated 0/3.15	Kg/m^3	—	1540	1275
Gravel 5/12.5	Kg/m^3	1070.67	—	—