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Table 4 Previous equation for estimation of the tensile strength of concrete at ambient temperature.

From: Prediction of the Tensile Strength of Normal and Steel Fiber Reinforced Concrete Exposed to High Temperatures

Reference Equation [MPa] Reference Equation [MPa]
CEB_FIP (1990) \(f_{t} = 0.3f_{c}^{0.67}\) Hueste et al .(2004) \(f_{t} = 0.55f_{c}^{0.5}\)
ACI 363R-92 (1984) \(f_{t} = 0.59f_{c}^{0.5}\) Thomas and Ramasamy (2007) \(f_{t} = 0.57f_{c}^{0.5}\)
ACI318-99 (2005) \(f_{t} = 0.56f_{c}^{0.5}\) Xu and Shi (2009) \(f_{t} = 0.21f_{c}^{0.83}\)
Ahmad and Shah (1985) \(f_{t} = 0.46f_{c}^{0.55}\) Ramadoss (2014) \(f_{t} = 0.12f_{c}^{0.95}\)
Wafa and Ashou (1992) \(f_{t} = 0.58f_{c}^{0.5}\) Choi and yuan (2005) \(f_{t} = 0.6f_{c}^{0.5}\)
Rashid et al. (2002) \(f_{t} = 0.47f_{c}^{0.56}\) Perumal (2014) \(f_{t} = 0.188f_{c}^{0.84}\)
  1. \({f}_{c}\) The cylindrical compressive strength of plain concrete (MPa)