Mechanical Performance and Microstructure of Ultra-High-Performance Concrete Modified by Calcium Sulfoaluminate Cement

Table 1

Oxide compositions of the CSA and OPC cement powder (by wt. %).

	CaO	SiO2	Al2O3	SO3	Fe2O3	MgO	K2O	Na2O	TiO2	SrO	BaO	Mn3O4	LOI
CSA	42.33	9.00	33.82	8.83	1.35	2.29	0.22	0.12	1.61	0.07	0.02	0.03	0.31
OPC	62.14	19.42	4.83	4.81	1.95	2.13	0.75	0.24	0.24	0.07	0.02	0.07	3.33
SF	0.11	97.90	0.52	—	0.17	0.10	—	0.99	—	—	—	—	0.21
FA	3.83	60.84	23.73	0.63	6.96	0.55	—	—	—	—	—	—	3.46
GGBS	37.11	32.91	15.36	—	0.74	8.52	—	—	1.95	—	—	—	3.41

Note: SF: silica fume; FA: fly ash; GGBS: ground granulated blast furnace slag; LOI: loss on ignition.