Answer :
Final answer:
The modulus of rupture in concrete is a measure of its tensile strength. It represents the maximum tensile stress that a concrete specimen can withstand before it fails in tension. The modulus of rupture is influenced by the compressive strength of the concrete. Based on the given information, the modulus of rupture of the concrete is most likely to be higher than 3.5 ksi.
Explanation:
The modulus of rupture in concrete is a measure of its tensile strength. It represents the maximum tensile stress that a concrete specimen can withstand before it fails in tension. The modulus of rupture is typically determined through a flexural test, where a concrete beam is subjected to a bending load until it fractures.
In this problem, we are given that the compressive strength of the concrete is 3.5 ksi (thousand pounds per square inch) and the unit weight of the concrete is 145 lb./ft3 (pounds per cubic foot).
The modulus of rupture is influenced by the compressive strength of the concrete. Generally, higher compressive strength results in a higher modulus of rupture.
Based on the given information, we can conclude that the modulus of rupture of the concrete is most likely to be higher than 3.5 ksi. Therefore, the correct answer is not option d) 14 psi.
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