Review Article
Influence of Ground Temperature on Shotcrete-to-Rock Adhesion in Tunnels
Table 5
Designed mix proportions for the bond strength improvement test [
47].
| Designed mix proportions | Description |
| BP | Basic mix proportion (no mineral admixture or the fiber material): cement: 400 kg/m3; sand: 814 kg/m3; gravel: 666 kg/m3; water: 200 kg/m3; accelerator: 20 kg/m3 | 25% SP | 25% of cement replaced by slag powder | 25% FA | 25% of cement replaced by fly ash | SF | 1% (volume ratio) of steel fiber mixed | PF | 0.9 kg/m3 of polypropylene fiber mixed | DF | Double mix of 1% (volume ratio) of steel fibers and 0.9 kg/m3 of polypropylene fiber |
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