Question

Design strength for M25 concrete in direct compression, bending compression and flexural tension are, respectively:

• A. 25 MPa, 11.15 MPa and 2.57 MPa
• B. 10 MPa, 11.15 MPa and 3.5 MPa
• C. 25 MPa, 11.15 MPa and 3.0 MPa
• D. 10 MPa, 12.5 MPa and 3.5 MPa

Hint:

Always remember: Concrete is strong in compression and weak in tension. The direct compression limit ($0.4f_{ck}$) is stricter than the bending compression limit ($0.446f_{ck}$) because there is no neutral axis to provide relief.

Answer 1

The Correct Option is B