the displayed concrete strength shown fcu,cyl, how can i change back to fcu,cube?
Dear Michael,
Thank you for your enquiry.
For different calculation standard applied, the concrete strength shown may be different. However, it wont affect the calculation. For example, if the report shows fcu,cyl=C25, this calculation can be still referred to fcu,cube=C30.
We may also refer to EC2. Table 3.1 (p.31/227 of the below link) shows the equivalence concrete class for cylinder strength and cube strength. The definition of fck and fck,cube can be found from section 3.1.2 Strength(1) (p.29/227). It explains the value of cube strength that when the report shows the cylinder strength.
https://www.phd.eng.br/wp-content/uploads/2015/12/en.1992.1.1.2004.pdf
Please let us know if you have further questions.
Regards,
Daniel Ng
Technical Engineer