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request for clarifying a doubt regarding mix design of Self
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ravi_teja
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Joined: 22 Jul 2012
Posts: 6

PostPosted: Fri Oct 26, 2012 4:13 pm    Post subject: request for clarifying a doubt regarding mix design of Self Reply with quote

Hai everyone,
I have been doing my project in Self Compacting Concrete. Among the IEEE journals I collected, 53 grade OPC is only used. Can any one clarify my doubt that only 53 grade OPC should be used or 43 grade OPC can also be used. Awaiting your reply 
Thankyou.  


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SUNEIL
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Joined: 20 May 2009
Posts: 6
Location: India

PostPosted: Sat Oct 27, 2012 3:20 am    Post subject: request for clarifying a doubt regarding mix design of Self Reply with quote

So far as what i have read is that cenment grade 43 and 53 both can be used for SCC.And as per the European guidelines all cements conforming to EN-197-1 can be used for SCC.
Thannks
suneil mehta
ALWAYS  BE POSITIVE !!!!


On Sat, Oct 27, 2012 at 7:48 AM, ravi_teja <forum@sefindia.org (forum@sefindia.org)> wrote:
Quote:
           Hai everyone,
I have been doing my project in Self Compacting Concrete. Among the IEEE journals I collected, 53 grade OPC is only used. Can any one clarify my doubt that only 53 grade OPC should be used or 43 grade OPC can also be used. Awaiting your reply 
Thankyou.  

     



     



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anantparghi
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Joined: 24 Nov 2008
Posts: 9

PostPosted: Sat Oct 27, 2012 3:53 am    Post subject: Re: request for clarifying a doubt regarding mix design of S Reply with quote

ravi_teja wrote:
Hai everyone,
I have been doing my project in Self Compacting Concrete. Among the IEEE journals I collected, 53 grade OPC is only used. Can any one clarify my doubt that only 53 grade OPC should be used or 43 grade OPC can also be used. Awaiting your reply
Thankyou.  


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Dear Ravi, for self compacting concrete (SSC) you can all kind of cement. If you would use 53 Grade of cement then SCC will give higher strength, but if you use 43 Grade of cement it will give less strength. There is no restriction for grade of cement for SSC. Its depends on what of kind of structure you are going to use as SSC.
Regards !
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satheeshhavisa
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Joined: 29 Sep 2010
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PostPosted: Sat Oct 27, 2012 4:40 am    Post subject: request for clarifying a doubt regarding mix design of Self Reply with quote

Hi,
53 Grade concrete will be suitable for RCC structure, even if you are planning to go with Free flow concrete also.  

Thanks and Regards,
Satheesh S V
Structural Engineer  
Tel: 91-80-66512963






From: ravi_teja [mailto:forum@sefindia.org]
Sent: Saturday, October 27, 2012 7:48 AM
To: general@sefindia.org
Subject: [SEFI] request for clarifying a doubt regarding mix design of Self Compacting Concrete.



Hai everyone,
I have been doing my project in Self Compacting Concrete. Among the IEEE journals I collected, 53 grade OPC is only used. Can any one clarify my doubt that only 53 grade OPC should be used or 43 grade OPC can also be used. Awaiting your reply
Thankyou.

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satheeshsv
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PostPosted: Sat Oct 27, 2012 6:38 am    Post subject: request for clarifying a doubt regarding mix design of Self Reply with quote

Hi,<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

53 Grade concrete will be suitable for RCC structure, even if you are planning to go with Free flow concrete also.



Thanks and Regards,

Satheesh S V

Structural Engineer


On Sat, 27/10/12, ravi_teja <forum@sefindia.org> wrote:
[quote]
From: ravi_teja <forum@sefindia.org>
Subject: [SEFI] request for clarifying a doubt regarding mix design of Self Compacting Concrete.
To: general@sefindia.org
Date: Saturday, 27 October, 2012, 2:18 AM

Hai everyone,
I have been doing my project in Self Compacting Concrete. Among the IEEE journals I collected, 53 grade OPC is only used. Can any one clarify my doubt that only 53 grade OPC should be used or 43 grade OPC can also be used. Awaiting your reply
Thankyou.





--

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dipak_bhattacharya
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Joined: 18 Jun 2011
Posts: 76

PostPosted: Sun Oct 28, 2012 5:33 pm    Post subject: request for clarifying a doubt regarding mix design of Self Reply with quote

Dear SEFI members,

Let somebody first clarify what is this cement- grade business ? What is the physics, chemistry and mathematics behind it ? There are thousands of master piece structures constructed all over the world when the concept did not exist. Who has created this business and why every authority is silently accepting it?Why grade 33 has been removed from the market and replaced by only costlier and higher  grades?


Thanks,


Dipak Bhattacharya
=========
[quote]  
 


On Sat, 27/10/12, ravi_teja wrote:
[quote]
From: ravi_teja
Subject: [SEFI] request for clarifying a doubt regarding mix design of Self Compacting Concrete.
To: general@sefindia.org (general@sefindia.org)
Date: Saturday, 27 October, 2012, 2:18 AM

Hai everyone,
I have been doing my project in Self Compacting Concrete. Among the IEEE journals I collected, 53 grade OPC is only used. Can any one clarify my doubt that only 53 grade OPC should be used or 43 grade OPC can also be used. Awaiting your reply
Thankyou.


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anantparghi
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Joined: 24 Nov 2008
Posts: 9

PostPosted: Mon Oct 29, 2012 2:32 am    Post subject: Re: request for clarifying a doubt regarding mix design of S Reply with quote

[quote="dipak_bhattacharya"]Dear SEFI members,

Let somebody first clarify what is this cement- grade business ? What is the physics, chemistry and mathematics behind it ? There are thousands of master piece structures constructed all over the world when the concept did not exist. Who has created this business and why every authority is silently accepting it?Why grade 33 has been removed from the market and replaced by only costlier and higher  grades?


Thanks,


Dipak Bhattacharya
=========
[quote]  
 


On Sat, 27/10/12, ravi_teja wrote:
Quote:

From: ravi_teja
Subject: [SEFI] request for clarifying a doubt regarding mix design of Self Compacting Concrete.
To: general@sefindia.org (general@sefindia.org)
Date: Saturday, 27 October, 2012, 2:18 AM

Hai everyone,
I have been doing my project in Self Compacting Concrete. Among the IEEE journals I collected, 53 grade OPC is only used. Can any one clarify my doubt that only 53 grade OPC should be used or 43 grade OPC can also be used. Awaiting your reply
Thankyou.


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chirag_baxi
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Joined: 07 Mar 2012
Posts: 7

PostPosted: Mon Oct 29, 2012 2:53 am    Post subject: request for clarifying a doubt regarding mix design of Self Reply with quote

Grade of Cement has always been a mystry of words for marketing purposes.
Well, there is some sense in it which has relation with gaining process of strength over a period of time, but significance wise, it is an individual's perception.
Basically good construction practices only - can get you good quality of concrete. Achiving quality concrete with good density, strength, long life and near impermeability is directly proportional to its prerparation and pacing in forms with laid down procedures and sticking to basics.
As has been rightly said, ancient structures did not have any gradation concept of cement or construction chemicals and still, Taj stands as a glory of India today.
It is unfortunate to note that religiously following the basics in today's time has almost been forgotten. Unless a "Policeman" approach is enforced (barring few exceptions) it is impossible to get the desired involvement of supervisors in the construction activity.
Some times, time constraint also makes a big difference in contribution of the front liners towards quality.

Chirag Baxi
Chief Manager (Civil)
GNFC Ltd.
M: 9724334532, 9825567423
Quote:
-- Original Message --
From: dipak_bhattacharya (forum@sefindia.org)
To: general@sefindia.org (general@sefindia.org)
Sent: Monday, October 29, 2012 7:48 AM
Subject: [SEFI] Re: request for clarifying a doubt regarding mix design of Self


Dear SEFI members,

Let somebody first clarify what is this cement- grade business ? What is the physics, chemistry and mathematics behind it ? There are thousands of master piece structures constructed all over the world when the concept did not exist. Who has created this business and why every authority is silently accepting it?Why grade 33 has been removed from the market and replaced by only costlier and higher grades?


Thanks,


Dipak Bhattacharya
=========
Quote:




On Sat, 27/10/12, ravi_teja wrote:
Quote:

From: ravi_teja
Subject: [SEFI] request for clarifying a doubt regarding mix design of Self Compacting Concrete.
To: general@sefindia.org (general@sefindia.org) (general@sefindia.org (general@sefindia.org))
Date: Saturday, 27 October, 2012, 2:18 AM

Hai everyone,
I have been doing my project in Self Compacting Concrete. Among the IEEE journals I collected, 53 grade OPC is only used. Can any one clarify my doubt that only 53 grade OPC should be used or 43 grade OPC can also be used. Awaiting your reply
Thankyou.








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tiach
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Joined: 25 Jan 2011
Posts: 4

PostPosted: Mon Oct 29, 2012 3:20 am    Post subject: request for clarifying a doubt regarding mix design of Self Reply with quote

The grade 43 and 53 in cement mainly corresponds to the average
compressive strength attained after 28 days ( 6724 hours) in mega
pascals (Mpa) of at least three mortar cubes ( area of face 50 cm
squared) composed of one part cement, 3 parts of standard s and

( conforming to IS 650:1966) by mass and P/4 ( P is the percentage of
water required to produce a paste of standard consistency as per IS
standard) + 3 percentage ( of combined mass of cement plus sand) of
water , prepared, stored and tested in the manner described in methods
of physical test for hydraulic cement.

721 hr not less than 23 MPa for 43 grade, 27 MPa for 53 grade

1682 hrs not less than 33MPa for 43 grade, 37MPa for 53 grade

6724 hrs not less than 43MPa for 43 grade, 53 MPa for 53 grade

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parasravi
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Joined: 30 Aug 2009
Posts: 11

PostPosted: Mon Oct 29, 2012 7:55 am    Post subject: different grades of cement Reply with quote

Please see the attached doc file for different grades of cement.
Regards
ParasRavi



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