Standard Deviation
Category:support request

Grade of concrete in a particular construction is unknown.However cubes' strength are available. Cubes have been taken in right frequency as per IS:456-2000. Is it possible to determine the Grade of concrete from available data of cubes' strength?


#1 submitted by sunilkshrivastav on Thu, 02/11/2010 - 05:47

Dear Mr P K Mallick
You should calculate standard deviation and mean of all sample results thenafter apply the acceptance criteria as per page 30 table 11 of IS 456:2000 with amendments No.3.From this you can find out strength of concrete for your decision making.

Sunil Kumar Shrivastav
SEFI Member

#2 submitted by civilenggmink on Fri, 09/24/2010 - 16:09
Title:GRADE OF CONCRETE.» Standard Deviation
Assigned to:P.K.Mallick» civilenggmink

Dear Sir

i want to know why we need calculate standard deviation for concrete....?

pls ..