##### What is the formula for concrete cube compressive test by ...

What is the formula for concrete cube compressive test by Accelerated Curing Tank (ACT) method? ... The question as i understand regards the gaining of the real28 gays Compressive strength using the formule of ACT for cub test, The formula is : R28 =8.09 +1.64 Ra Where. Ra. Is the result gained From the ACT Cube test, in newtons / mm2 and R28 ...