Age strength of concrete
Strength of concrete on perticular required day can be find out by following formula as per SP 24 :- t/(a+bxt) x fck Where, t, is the age in days a, is value = 4.7 b, is value = 0.833 fck, is compressive strength of the concrete Example: To find compressive strength of concrete on 3rd day , fck is 35 N/mm2 Implementing above formula t/(a+bxt) x fck 3/(4.7+0.833x3) x 35 = 14.59 N/mm2 Which is 15/35x100= 41.67% of fck