Table 9.
Effect of silica fume on some of the mechanical properties and durability recorded by different researchers.
| Dose range | W/C | Curing time | Optimum compressive strength |
Optimum split tensile strength |
Optimum flexural strength |
Durability of adding Silica fume comparing with control mixtures |
References | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Dose (%) | Age (days) | Dose (%) | Age (days) | Dose (%) | Age (days) | Water absorption | Acidic attack | ||||
| 0,5,10,15,20 | 0.36 | 7,28 | 15 | 7,28 | 10 | 7,28 | 15 | 7,28 | – | Decrease | [327] |
| 0,5,10,15,20 | 0.32 | 7,28,56,90 | 10 | 7,28,56,90 | 10 | 7,28, 56,90 |
– | – | – | – | [312] |
| 0,10,20,30, 40 |
0.55 | 3,7,14, 28 |
30 | 14,28 | 30 | 28 | 30 | 28 | – | – | [328] |
| 0,7,10 | 0.40 | 28 | 7 | 28 | 7 | 28 | 7 | 28 | – | – | [329] |
| 0,0.5, 1,5,10,15 |
– | 3,7,14, 21,28 |
10 | 3,7,14, 21,28 |
– | – | – | – | – | – | [330] |
| 0,2.5,5,7.5,10 | 0.48 | 28 | 10 | 0,2.5,5,7.5,10 | 10 | 28 | – | – | – | – | [331] |
| 0,6,12,18,24 | 0.48 | 3,7,28, 56 |
18 | 7,28,56 | – | – | – | – | – | – | [332] |
| 0,5,10 | 0.50 | 7,28,90 | 10 | 7,28,90 | 10 | 7,28, 90 |
– | – | Decrease | – | [333] |
| 0,3,6,9,12,15 | 0.36 | 28 | 12 | 28 | 12 | 28 | – | – | – | – | [334] |