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Past Discussion on this is reproduced hereinunder :
The practice being followed in CPWD is shared with SEFI community:
1. Provide specified concrete mix (i.e. richer mix) at column location.
2. This richer mix also simultaneously laid upto twice beam depth from column face .
3. Richer mix concrete was manufactured and laid prior to manufacture of lower grade concrete.
This is what we used to specify in structural drawings and also execute at site.
Anil K Sharma
--- On Fri, 10/17/08, vikram.jeet <email@example.com> wrote:
From: vikram.jeet <firstname.lastname@example.org>
Subject: [SEFI] Re: Concerte grade at beam-column jucntion
To: email@example.com Date: Friday, October 17, 2008, 1:03 PM
Concrete at beam column junction
I think we may not encourage the site to use a lower mix
at the junction. Approach of using the column mix(higher mix) at
junction will be appropriate. A higher mix (of column) could be
prepared first and junctions could be filled in the begining of
concreting. In high rise constructions the differential in column
mixes vs Beam /slabsMix will always be there being dictated by
the design requirements
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