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- since 1996 -

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Technical Discussions
Azhar Jamil
NDT Engineer
Panama, Joined May 2006, 17

Azhar Jamil

NDT Engineer
Panama,
Joined May 2006
17
04:31 Jun-26-2006
Inspection of concrete pillars

Can any one knows that how to found deterioration in the concrete pillar which supports steam turbine foundations.

for any queries please contact

regards



    
 
 Reply 
 
Herman J. Quakkelsteijn
Herman J. Quakkelsteijn
07:36 Jun-26-2006
Re: Inspection of concrete pillars
RTD developed a pulsed eddy current technique able to detect general wall loss on ferrous objects without the removal of concrete. Technique is proven on the legs of spherical tanks with up to 200 mm of concrete.

----------- Start Original Message -----------
: Can any one knows that how to found deterioration in the concrete pillar which supports steam turbine foundations.
: for any queries please contact
: regards
------------ End Original Message ------------




    
 
 Reply 
 
John O'Brien
Consultant, -
Chevron ETC , USA, Joined Jan 2000, 278

John O'Brien

Consultant, -
Chevron ETC ,
USA,
Joined Jan 2000
278
01:26 Jun-27-2006
Re: Inspection of concrete pillars
You may need to provide more detail about the problem to solicit a response. i.e what thickness of concrete and damage mechanism you are seeking. If the concrete pillars are simple reinforced concrete, techniques such as Impact Echo or Acoutsic Emission from Corroding Rebar may be effective. Thicker sections and foundations techniques such as Ground Penetrating radar might provide data.



    
 
 Reply 
 
Ernst Niederleithinger
Ernst Niederleithinger
03:42 Jun-27-2006
Re: Inspection of concrete pillars
Dear Azhel Jamir,
There are a lot of possibilities: Ultrasonics, radar, x-ray, Schmidt-hammer,....
More information (geometry, accessibility,...) is needed to select proper method.
Regards, Ernst Niederleithinger
----------- Start Original Message -----------
: Can any one knows that how to found deterioration in the concrete pillar which supports steam turbine foundations.
: for any queries please contact
: regards
------------ End Original Message ------------




    
 
 Reply 
 
R. O. Duesing
R. O. Duesing
03:47 Jun-27-2006
Re: Inspection of concrete pillars
----------- Start Original Message -----------
: You may need to provide more detail about the problem to solicit a response. i.e what thickness of concrete and damage mechanism you are seeking. If the concrete pillars are simple reinforced concrete, techniques such as Impact Echo or Acoutsic Emission from Corroding Rebar may be effective. Thicker sections and foundations techniques such as Ground Penetrating radar might provide data.
------------ End Original Message ------------

Acoustic Emission is an excellent method for testing composite structures, in this instance concrete reinforced columns. On pre and post stressed concrete bridges and concrete support columns; i.e. highway overpasses, stepped loading and dynamic loading is applied while being monitored with Acoustic Emission sensors. The best scenario is to monitor suspect columns/spans at the same time with known good columns/spans in a comparative test.



    
 
 Reply 
 

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