233 posts
TimePosted 20/06/2012 05:00:47
xxxx says

### ESTIMATION OF COMPRESSIVE STRENGTH

DEAR ALL

HOW CAN WE ESTIMATE 1,3. 7 & 28 DAYS STRENGTH BY KNOWING THE OXIDE COMPOSITION OF CLINKER OR CEMENT ALONG WITH BLAINE.

IS THERE ANY FORMULA FOR THE SAME.

ALSO IS THERE ANY RELATIONSHIP BETWEEN THE STRENGTH DEVELOPMENT FOR 1,3,7 & 28 DAYS. I MEAN IS THERE ANY LOGICAL DIFFRENCE BETWEEN TWO CONSEQUTIVE STRENGTH VALUES?

XXXXXX

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537 posts
TimePosted 20/06/2012 05:22:45

### re ESTIMATION OF COMPRESSIVE STRENGTH

https://engineering.purdue.edu/~concrete/students/Anand_Krishnan/Krishnan_Chapter-3.pdf

http://jcsp.org.pk/index.php/jcsp/article/viewFile/494/174

Regards,

Ted.

81 posts
TimePosted 21/06/2012 12:46:07
Silastman says

### re ESTIMATION OF COMPRESSIVE STRENGTH

There is a simple formula for calculating the kinetics of    hardening cement concretes

Rn=R28 * Ln(n)/ln(28)

where Rn - strength in n-days, R28 - strength in 28 days, n - days, 28 days

Example; in 7-days you has strength 23 MPa, in 28 days strength will be

R28=23 * Ln28/Ln7 =23* 3.33/1.94=39.4 MPa