just a follow up questions for https://www.engineersheaven.org/...-M20-/-M25-Concrete?
What is characteristic strength of concrete? | Q & A
Engineers Heaven
Jan 29
Characteristic strength is the compressive strength of concrete below which not more than 5% of test results are expected to fall, when tested at 28 days.
Short interview line:
It is the guaranteed strength of concrete at 28 days with 95% reliability.
