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control cement concrete m 30 compressive strength 7 days

Grade Designation =M-30. Exposure condition= Moderate.Cement= OPC 53 Grade, assume7-Day compressive strengthofCementis 37 N/mm 2 Fck =30N/mm 2. Standard deviation forM-30is 5 N/mm 2. Target meanstrengthft = fck + 1.65X S =30+ (1.65 X 5) = 38.25 N/mm 2

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