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thirumalaichettiar Silver Sponsor
Joined: 26 Jan 2003 Posts: 3554
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Posted: Tue Nov 20, 2012 5:13 pm Post subject: Post that appeared in General discussion. |
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http://www.sefindia.org/forum/viewtopic.php?p=52567#52567
In the above link Er. K.Gangadharan has posted some important aspect on Pumping of concrete for Tall buildings with a quote from S.A.Reddy the ex Joint Managing Director of Gammon India Ltd.
Moderators have to take note of it and need a response from experts.
T.RangaRajan. |
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suraj General Sponsor
Joined: 17 Apr 2008 Posts: 5744 Location: NCR Faridabad, E mail suraj_engineer@yahoo.co.uk
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Posted: Tue Nov 27, 2012 10:20 am Post subject: Raising ready mix concrete to higher levels supplementary di |
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Raising ready mix concrete to higher levels supplementary discussion
Dear Eng Gangadharan Ji
http://www.sefindia.org/forum/viewtopic.php?t=13130
I agree with concern you raised, which is extremely, significant from engineering view point
- All materials can be raised to higher levels with exception of concrete
- Concrete causes issues to be contemplated requiring site thought & pre scheme to handle concrete transport issues
- Moreover, heavy power pumps are certainly, required to effect transportation
- Yet, pump alone would not resolve transport issue
- Normally, in general cases, concrete is transported to locations either using mobile pumps or like in old years in 80s, stationary reciprocating pump were used to do so
- Up to 100 m heights, higher capacity mobile pumps could be used for concrete placement, duly professionally managed
- Higher elevations do not permit such systems due to fact of weight of concrete in pump boom as well as, weight of boom itself
- Extra mechanical system may be required to help concrete raised to further heights as you rightly stated
- 1400 hp pump was employed on Burge
- It was used based on site mock up testing as well as, one standby also, used
- Foregoing links explains general requirement in such cases of transporting concrete
- No direct route should be designed for concrete movement to avoid stresses in vertical or in boom position
- Route requires to be deviated many time allowing passing through many penetrations & bend, so as in case of emergency, intermediate controls can be operated
- HPC shall certainly be required in every case, while additional intermediate stations would also, be required for further heights
_________________ Thanks & Warm Regards
IntPE(India)Suraj Singh FIE Civil
Engineering & Arbitration
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