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Q: Shear strength of concrete is _________ of compressive strength of concrete.
  • A. 10%
  • B. 5%
  • C. 20%
  • D. 15%
Correct Answer: Option C - Shear strength of concrete– Shear strength of concrete was found to be approximately 20% of its compressive strength from the intersection point of failure envelope of the mohr's diagram with the vertical axis or shear stress axis. • It is generally agreed that as the rate of loading increases the apparent strength decreases. • The rate of stress is specified as 0.23-0.25 MPa/s in most standards on strength and modulus of elasticity determination method.
C. Shear strength of concrete– Shear strength of concrete was found to be approximately 20% of its compressive strength from the intersection point of failure envelope of the mohr's diagram with the vertical axis or shear stress axis. • It is generally agreed that as the rate of loading increases the apparent strength decreases. • The rate of stress is specified as 0.23-0.25 MPa/s in most standards on strength and modulus of elasticity determination method.

Explanations:

Shear strength of concrete– Shear strength of concrete was found to be approximately 20% of its compressive strength from the intersection point of failure envelope of the mohr's diagram with the vertical axis or shear stress axis. • It is generally agreed that as the rate of loading increases the apparent strength decreases. • The rate of stress is specified as 0.23-0.25 MPa/s in most standards on strength and modulus of elasticity determination method.