Question

The compressive strength of good Portland cement and standards and mortar after 3 days of curing should not he less than

• A. 17.5 N/mm^2
• B. 7 mN/m^2
• C. 21 mN/m^2
• D. 11.5 mN/m

Answer 1

Answer:

D. 11.5 mN/m