Research Article
An Accelerated Test Method of Simultaneous Carbonation and Chloride Ion Ingress: Durability of Silica Fume Concrete in Severe Environments
Table 1
Characteristics of the cement and silica fume.
| | Oxide elements and chemical composition (% by mass) | Cement (C) | Silica fume (S) |
| | Silicon dioxide (SiO2) | 21.10 | 93.2 | | Calcium oxide (CaO) | 62.08 | 0.63 | | Ferric oxide (Fe2O3) | 2.74 | 0.24 | | Aluminum oxide (Al2O3) | 3.81 | 0.39 | | Sulphate oxide (SO3) | 2.6 | 0.23 | | Magnesium oxide (MgO) | 3.22 | 0.75 | | Potassium oxide (K2O) | 0.73 | 0.21 | | Sodium oxide (Na2O) | 0.12 | 0.23 | | Phosphorus oxide (P2O5) | 0.22 | — | | Titanium oxide (TiO2) | 0.24 | — |
| | C3S | 51.1 | — | | C2S | 23.1 | — | | C3A | 5.1 | — | | C4AF | 8.4 | — |
| | Loss on ignition (%) | 2.95 | 1.95 | | Pozzolanic activity with cement (%) | — | 170–190 | | Physical properties | | | | Specific gravity | 3.17 | 2.1 | | Blaine fineness (cm2/g) | 3519 | 6000 | | Average diameter (m) | 15 | 1.5 |
|
|
