Table 9 Bond strength of steel fiber and rebar in UHPC.
References | Reinforcement type | Diameter (mm) | Embedded length (mm) | Curing regime | Bond strength (MPa) |
|---|---|---|---|---|---|
Behloul (1996) | 13 mm steel fiber | 0.15 | – | – | 11.5 |
Chan and Chu (2004) | 0.16 | 10 | 85 °C and 90 % RH for 3 days | 5.5 | |
Lee et al. (2010) | 13 mm steel fiber at 0o | 0.20 | 6.5 | Steam curing 90 °C for 2 days | 6.8 |
13Â mm steel fiber at 15o | 0.20 | 10.8 | |||
13Â mm steel fiber at 30o | 0.20 | 12.7 | |||
Wille and Naaman (2012) | 13 mm steel fiber | 0.20 | 6.5 | 20 °C (Laboratory environment) | 10.4 |
30Â mm steel fiber twisted | 0.30 | 46.9 | |||
30Â mm steel fiber hooked | 0.30 | 42.2 | |||
Park et al. (2014) | 30 mm smooth steel fiber | 0.30 | 15 | Water curing at 90 °C for 3 days | 9.9 |
30Â mm hooked steel fiber | 0.37 | 11.7 | |||
62Â mm hooked steel fiber | 0.77 | 11.4 | |||
30Â mm twisted steel fiber | 0.30 | 6 | 32.0 | ||
Collepardi et al. (1997) | Deformed rebar | 20 | – | Standard | 28.4 |
Cheyrezy et al. (1998) | Prestressing strand | 13 | – | Standard | 35.0 |
Cheyrezy et al. (1998) | Prestressing wire | 5 | – | Standard | 10.0 |
Reineck and Greiner (2004) | Deformed rebar | 4 | 8 | – | 46.0 |
Holschemacher et al. (2004) | Deformed rebar | 10 | 15 | Under water, 3Â days | 34.0 |
Deformed rebar | 10 | Under water, 7Â days | 47.0 | ||
Deformed rebar | 10 | Under water, 28Â days | 68.0 | ||
Deformed rebar | 10 | Under water, 56Â days | 70.0 | ||
Holshemacher et al. (2005) | Deformed rebar | 10 | – | – | 56.0 |
Lee et al. (2005) | Epoxy coated rebar | 10 | – | – | 12.7 |
Tuchlinski et al. (2006) | Prestressing strand | 13 | – | – | 15.0 |
Maroliya (2012) | Deformed rebar | 8 | 75 | Hot water curing | 4.8 |
Deformed rebar | 8 | 7.5 |