What is the relationship between cylinder strength and cube strength? And is it the same for lightweight concrete?
There is no single expression linking cylinder strengths to cube strengths in Eurocode 2, but they are given in Table 3.1 of BS EN 1992-1-1 for normal weight concrete.. For lightweight concrete the information is given in Table 11.3.1 and roughly speaking the cylinder strength is 90% of the cube strength.
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