For high-strength concrete, a cement should produce a minimum 7-days mortar-cube strength of approximately _ MPa.
A. 10
B. 20
C. 30
D. 40
Answer:C
For high-strength concrete, a cement should produce a minimum 7-days mortar-cube strength of approximately _ MPa.
A. 10 B. 20 C. 30 D. 40
Explanation: For high-strength concrete, a cement should produce a minimum 7-days mortar-cube strength of approximately 30 MPa.