Abrams' law explained

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

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

S = (A)/(B ^{w/c})

where

S is the strength of concrete

A and B are constants and A=96 N/mm2, B=7 (this is valid for the strength of concrete at the age of 28 days)

w/c is the water–cement ratio, which varies from 0.3 to 1.20

References

^[3]

Notes and References

1. Book: Punmia, Dr B. C.. Basic Civil Engineering. Jain. Ashok Kumar. Jain. Arun Kr. 2003-05-01. Firewall Media. 9788170084037. en.
2. Book: Scott, John S.. Dictionary Of Civil Engineering. 1992-10-31. Springer Science & Business Media. 9780412984211. en.
3. Abrams law, air and high water-to-cement ratios by ELSEVIER