I have read your article. I have one more question regarding this.
What should be frequency to check standrad deviation at site ? Monthly or when design mix is changed ?
It is procted file. Can you please share password ? i have to prepared it for my current project. it is required to change FCK valuse as M30 grade is used in my project.
There are 5 samples taken to check brick compressive strength. Results are following :
1. 6.52
2. 6.09
3. 13.5
4. 6.96
5. 5.22
Indivisual results are below 7.5 but the avg result is 7.65 N/mm2. ( As per spec . strenght should be more than 7.5 )
So results are passed or failed ??
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