Rheological Properties of Very High-Strength Portland Cement Pastes: Influence of Very Effective Superplasticizers

Table 1

Chemical composition and physical properties of Ultracem 52.5 R.

Chemical analysis (%)			Physical tests
Calcium oxide (CaO)	63.23		Specific gravity (g/cm3)	3.14
Silica (SiO2)	20.02		Specific surface Blaine (cm2/g)	4000
Alumina (Al2O3)	4.12		Compressive strength (MPa)
Iron oxide (Fe2O3)	1.87		2 days	33.0
Sulfur trioxide (SO3)	3.43		28 days	55.0
Magnesia (MgO)	4.2		Setting time, Vicat test (min)
Sodium oxide (Na2O)	0.003		Initial setting	160
Potassium oxide (K2O)	0.0015		Final setting	200
Loss on ignition	0.80		BET specific surface area (m2/g)	1.82
Phase composition	C3S 49.1%	C2S 19.7 %	C3A; 7.91%	C4AF 5.2 %