Abrams' law

Abrams' law (also called Abrams' water-cement ratio law)[1] is a concept in civil engineering that was developed by Duff Abrams. The law states the strength of a concrete mix is inversely related to the mass ratio of water to cement.[1][2] As the water content increases, the strength of concrete decreases.

Abrams’ law is a special case of a general rule formulated empirically by René Feret:

where

S is the compressive strength of concrete in Mpa
A and B are constants: A=96 and B=7 (this is valid for the strength of concrete at the age of 28 days)
w/c is the water–cement ratio, which typically varies from 0.40 to 0.60

References

  1. 1 2 Punmia, Dr B. C.; Jain, Ashok Kumar; Jain, Arun Kr (2003-05-01). Basic Civil Engineering. Firewall Media. ISBN 9788170084037.
  2. ↑ Scott, John S. (1992-10-31). Dictionary Of Civil Engineering. Springer Science & Business Media. ISBN 9780412984211.

[1]


  1. ↑ Abrams law, air and high water-to-cement ratios by ELSEVIER
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