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1.How much strength will be attained for M30 grade of
concrete after 28 days?
2.Is it attain 30 N/mm2 or target mean strength?
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Answer Posted / shubham singh
1: M30
Target strength for mix proportioning
f’ck = fck + 1.65 s
Where
f’ck = Target average compressive strength at 28 days,
fck = Characteristic compressive strength at 28 days,
s= Standard deviation = 5 (IS 10262:2009, table 1)
From Table 1 ( IS 10262:2009, Clause 3.2)
f’ck = 30 + 1.65 * 5
= 38.25 N/mm2
2: It should attain target mean strength
| Is This Answer Correct ? | 3 Yes | 1 No |
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