Research Article

The Compressive Strength of High-Performance Concrete and Ultrahigh-Performance

Table 1

Physical properties and chemical analyses of cements C and silica fume.

Description of testsPortland cement (CPA CEM 52.5)Silica fume

Mortar strength
Compressive strength at:
2-days35 MPa
7-days50 MPa
28-days62 MPa

Chemical analysis
SiO219.8%89%
Al2O35.14%0.3%
Fe2O32.3%0.6%
CaO, total64.9%0.3%
MgO0.9%1.1%
SO3, total3.4%0.2%
K2O1.1%1.6%
Na2O0.05%0.6%
Si3.2%
Loss on ignition1.1%2.7%
Insoluble residue0.2%

Compound composition
C3S58%
C2S13%
C3A10%
C4AF7%