Question
Download Solution PDFAs per IS 10262 ∶ 2019, what is the assumed value of standard deviation (S) for M55 grade of concrete?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Where sufficient test results for a particular grade of concrete are not available, the value of standard deviation given in Table I may be assumed for the proportioning of mix in the first instance;
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As per IS 10262 ∶ 2019 Assumed Standard Deviation (Clauses 4.2.1.3)
| Grade of Concrete | Assumed Standard Deviation (N/mm2) |
| M 10 | 3.5 |
| M 15 | |
| M 20 | 4.0 |
| M 25 | |
| M 30 | 5.0 |
| M 35 | |
| M 40 | |
| M 45 | |
| M 50 | |
| M 55 | |
| M 60 | 5 |
| M 65 - 80 | 6 |
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