The corresponding strength at 28 days can be found out from the following correlation. (It is however suggested that a new specific correlation should be developed for the specific concrete used at site.)
R28 (Strength at 28 days) = 8.09 + 1.64 Ra
Ra = Accelerated Curing Strength in MPa.
Safety & Precautions
Use hand gloves, safety shoes, while removing containers from curing tank after switching off the curing tank & place sample in machine properly.
Equipment should be cleaned thoroughly before testing & after testing.