Target strength of concrete
How to calculate target strength of concrete? TARGET STRENGTH OF CONCRETE Formula; f'ck = fck + 1.65s Where; S = standard deviation Grade of concrete assumed 'S' N/mm² M10 to M15 3.5 M20 to M25 4.0 M30 to M55 5.0 From IS 10262:2009 Ex: Concrete grade = M25 - fck fck = 25 N/mm² at 2...