Computer · Concrete Technology
In standard designations like M20 and M25, the number represents the characteristic compressive strength of concrete cubes in N/mm2 at how many days of curing?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 17 days
- 214 days
- 321 days
- 428 days✓
Correct answer
28 days
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