why compressive strength of concrete cube is more than that of cylinder?

January 1, 2011

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.

5 Responses to “why compressive strength of concrete cube is more than that of cylinder?”

  1. civil09 said

    suggestions and improvements are welcomed

  2. Engr. A Q Khan Tanha said

    Good, worth seeing.

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

  4. S.Y. Lee said

    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 %.

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