where expertise comes together - since 1996 -

The Largest Open Access Portal of Nondestructive Testing (NDT)

Conference Proceedings, Articles, News, Exhibition, Forum, Network and more

where expertise comes together
- since 1996 -

KARL DEUTSCH
INSTRUMENTS AND SYSTEMS FOR NON-DESTRUCTIVE TESTING OF MATERIALS
2027 views
Technical Discussions
Doug Irish
Doug Irish
08:33 Mar-12-2001
Ultrasonic testing of concrete

I am trying to determine if the Krautkramer USN 60 will test for voids, caused by erosion, in the underlayment of a large concrete floor.Thanks


 
 Reply 
 
Jim Sabol
Jim Sabol
08:28 Mar-13-2001
Re: Ultrasonic testing of concrete
: I am trying to determine if the Krautkramer USN 60 will test for voids, caused by erosion, in the underlayment of a large concrete floor.Thanks
. The USN 60 is not designed for this application. The frequency bandwidth is not low enough to ensure penetration of the concrete. More importantly, there is a basic limitation caused by the principles of ultrasonics. The interface between the bottom of the concrete and the underlayment will always appear as an air gap whether the underlayment is intact or missing because of erosion. We suggest ground penetrating radar as a better solution.



 
 Reply 
 
John O'Brien
Consultant, -
Chevron ETC , USA, Joined Jan 2000, 280

John O'Brien

Consultant, -
Chevron ETC ,
USA,
Joined Jan 2000
280
01:43 Mar-23-2001
Re: Ultrasonic testing of concrete
UT is not the best solution for this. Try looking at Impact Echo device which is tailor made for this application. Try searching for Impact Echo or go to www.pacuk.co.uk


 
 Reply 
 
Michael Berke
Michael Berke
01:51 Mar-28-2001
Re: Ultrasonic testing of concrete
: I am trying to determine if the Krautkramer USN 60 will test for voids, caused by erosion, in the underlayment of a large concrete floor.Thanks
.I suggest to try with KRAUTKRAMER USM 23LF, a high power (1200 Volts), low frequency (50 - 500 kHz)Ultrasonic Flaw Detector, specially designed for high attenuative or coarse grain material. M. Berke, Krautkramer - Germany



 
 Reply 
 
Dan Johnson
Dan Johnson
05:46 Mar-28-2001
Re: Ultrasonic testing of concrete
: : I am trying to determine if the Krautkramer USN 60 will test for voids, caused by erosion, in the underlayment of a large concrete floor.Thanks

I suggest trying IMPACT ECHO TESTING, which works in the 1-60 kHz range, uses spherical impactors, and has been used in previous applications to determine the locations of such voids. This method corresponds to ASTM Standard C-1383-98 for measuring plate thickness. Dan E. Johnson, Physical Acoustics Corp., Princeton, NJ


 
 Reply 
 
oak
oak
02:40 Aug-29-2002
Re: Ultrasonic testing of concrete
: I am trying to determine if the Krautkramer USN 60 will test for voids, caused by erosion, in the underlayment of a large concrete floor.Thanks
.i want testing by ultrasonics of concreat


 
 Reply 
 
oak
oak
02:45 Aug-29-2002
Re: Ultrasonic testing of concrete
: : : I am trying to determine if the Krautkramer USN 60 will test for voids, caused by erosion, in the underlayment of a large concrete floor.Thanks
.
: I suggest trying IMPACT ECHO TESTING, which works in the 1-60 kHz range, uses spherical impactors, and has been used in previous applications to determine the locations of such voids. This method corresponds to ASTM Standard C-1383-98 for measuring plate thickness. Dan E. Johnson, Physical Acoustics Corp., Princeton, NJ
.testing of concreat



 
 Reply 
 
Melissa Rubio
Melissa Rubio
08:23 Sep-09-2002
Re: Ultrasonic testing of concrete
I would like to know if anyne has used Matlab to form artificial neural networks to test flaws in concrete non destructively.
please if anyone can help please do


 
 Reply 
 
Naveen Nair
Engineering
Indian Institute of Technology Madras, India, Joined Sep 2002, 1

Naveen Nair

Engineering
Indian Institute of Technology Madras,
India,
Joined Sep 2002
1
09:12 Sep-09-2002
Re: Ultrasonic testing of concrete
: I would like to know if anyne has used Matlab to form artificial neural networks to test flaws in concrete non destructively.
: please if anyone can help please do
.

Yes it can be done. I have used MATLAB based and self developed code to do NDE of certain composites. I have not specifically worked on concrete, but I am assuming that composites is a good enough generalisation.
please do let me know if i can be of any help
Nair




 
 Reply 
 
Apostolos Tsimogiannis
Engineering, and R&D and NDT Inspector
ENVIROCOUSTICS SA, Greece, Joined Jan 2000, 2

Apostolos Tsimogiannis

Engineering, and R&D and NDT Inspector
ENVIROCOUSTICS SA,
Greece,
Joined Jan 2000
2
00:13 Sep-18-2002
Re: Ultrasonic testing of concrete
: : I would like to know if anyne has used Matlab to form artificial neural networks to test flaws in concrete non destructively.
: : please if anyone can help please do
: .
.

We have done research work for both crack-like flaw detection, sizing and properties characterization, both in building (affected from earthquakes etc) and on laboratory specimens (during hardening and compression tests). The techniques we used were Acoustic Emission, Acousto-Ultrasonics and Ultrasonic velocity.
For signal discrimination we used Noesis a software for data analysis with Pattern Recognition and Neural Networks.
You can read about this work in published papers.
for example :

WCNDT 2000 ROME : Damage Level Evaluation and Characterization by Acoustic Emission and Acousto-Ultrasonics in Concrete Under Compressive Loads ( http://www.ndt.net/article/wcndt00/papers/idn449/idn449.htm)

ECNDT 2002 BARCELONA : DETERMINATION OF CONCRETE STRENGTH AND WATER TO CEMENT RATIO BY USING PATTERN RECOGNITION TECHNIQUES ON ACOUSTO-ULTRASONIC SIGNALS

See also the links.

best regards

Apostolos Tsimogiannis



 
 Reply 
 

Product Spotlight

HD-CR 35 NDT Computed Radiography System

Portable high-resolution CR scanner for all radiography applications - weld testing, profile images
...
and aerospace. No matter what type of radiographic testing you are performing, the unique TreFoc Technology of the HD-CR 35 NDT imaging plate scanner always guarantees the highest image quality.
>

Wireless TOFD scanner

Quick, accurate and highly reproducible welds testing. The System operates wirelessly and is compat
...
ible with any type of Windows based Laptop, Desktop or Tablet.
>

FAAST-PA! OEM Patented phased Array for high speed UT inspection

Multiangle, Multifocus, Multifrequency, Multibeam. Instead of stacking UT electronics and having m
...
any PA probes, FAAST-PA is able to transmit all delay laws within ONE single shot in Real time.
>

Immersion systems

ScanMaster ultrasonic immersion systems are designed for high throughput, multi shift operation in a
...
n industrial or lab environment. These fully integrated systems provide various scanning configurations and incorporate conventional and phased arrays technologies to support diverse applications, such as inspection of disks, bars, shafts, billets and plates. All of ScanMaster immersion systems are built from high accuracy scanning frames allowing for scanning of complex parts and include a multi-channel ultrasonic instrument with exceptional performance. The systems are approved by all major manufacturers for C-scan inspection of jet engine forged discs. Together with a comprehensive set of software modules these flexible series of systems provide the customer with the best price performance solutions.
>

Share...
We use technical and analytics cookies to ensure that we will give you the best experience of our website - More Info
Accept
top
this is debug window