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Civil Engineering QUESTION #6588
Question 1
If the crushing (compressive) strength of a concrete cylinder is \(5345\,\text{psi}\), its estimated tensile strength is approximately:
  • 1068.00 psi
  • 534.50 psi✔️
  • 267.25 psi
  • 178.16 psi
Correct Answer Explanation
The splitting tensile strength of concrete is typically about \(8\%–12\%\) of its compressive strength. Using \(10\%\): \(0.10 \times 5345 = 534.5\,\text{psi}\). ACI recommends \(f_t \approx 6.7\sqrt{f'_c}\) in psi, which gives \(6.7\sqrt{5345} \approx 490\,\text{psi}\), closest to option (b).