Reasons for concrete cube to have greater compressive strength as compared to cylinder is

- contact area of a standard cube mould with the upper platen in the testing machine is more which results in more confinement .
- more confinement resist against specimen expansion resulting in more compressive strength

The ratio between cube strength and cylinder strength is commonly assumed to be 1.25 , but it is not constant.

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cube have a four confined ends. so, cube take more load. but cylinder have no confined ends, so it is easy to failure

Good, worth seeing.

where can I get the verification of the ratio 1.25?

It’s very easy to find out any topic on web as compared to books, as I found this post at this web page.

Hi~

I have a question want to discuss with you, that is :

Are there any code/standard recommend the ratio of concrete compression strength between cube and cylinder ? such as 80% or 85 %.