Fly Ash Brick Compressive Strength Checker

Check a 3-brick sample against the compressive-strength requirements of IS 16720:2018.

Specified average 28-day wet compressive strength.
N/mm²
80% of specified class strength.
Raw Average
Average Used for Conformity
Lowest Individual
Enter all 3 results
The tool will automatically check the average and individual-strength requirements.
Important: If an individual test result exceeds 125% of the specified class strength, only 125% of the specified strength is used for calculating the conformity average. The actual test result is not changed or rejected. The lot passes compressive strength only when both the adjusted average and every individual result satisfy the applicable requirements.