Reinforced Concrete Beam Concepts

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1. The concrete could fail explosively in
2. In the illustration what is being tested?

Tensile strength of concrete

Which placement of the principle reinforcement would be best suited for the cantilever beam at mid-span?

4. In concrete design, f’c represents?
5. An “under-reinforced” section is one in which?
6. In determining the nominal strength of concrete (fc’), for how long is the test cylinder cured?
7. Higher water/cement ratio of a cement mix makes weaker concrete?True or False
8. Aggregate for making concrete is intentionally varied in size. Why?

If a reinforced concrete section was designed to be over reinforced, what would be the mode of failure?

10. In a simple span concrete beam, flexural steel is placed near the?
11. A higher the value for f’c in concrete will yield a higher the E modulus. True or False

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