PaintSquare.com
      | Connect Follow us on Twitter Like us on Facebook
About | Subscribe | Advertise
  

 

Download our free e-book! Overcoating bridges and other structures.

Paint and Coatings Industry News

Main News Page


Concrete ‘Skin’ Senses Damage

Wednesday, June 25, 2014

More items for Coating Materials

Comment | More

A new “sensing skin” made from electrically conductive paint could warn of concrete damage on a multitude of structures, allowing time for authorities to respond to potential danger, researchers behind the technology announced.

The technology works as an early warning system for numerous concrete structures, such as bridges and nuclear facilities, the North Carolina State University and University of Eastern Finland researchers said.

sensing skin
Wikimedia Commons

The "sensing skin" is an electrically conductive coat of paint that is applied over electrodes placed around the perimeter of a new or existing structure.

"The sensing skin could be used for a wide range of structures, but the impetus for the work was to help ensure the integrity of critical infrastructure such as nuclear waste storage facilities," said Dr. Mohammad Pour-Ghaz, an assistant professor of civil, construction and environmental engineering at NC State and co-author of a paper on the research.

How it Works

The "skin" is an electrically conductive coat of paint that is applied over electrodes placed around the perimeter of a new or existing structure.

The paint can use multiple kinds of conductive materials, like copper, making it relatively inexpensive, researchers said.

A computer program is used to run a small current between two of the electrodes at a time, cycling through the possible electrode combinations. As the current runs between the electrodes, the computer records the electrical potential at all of the electrodes on the structure and calculates the skin's spatially distributed electrical conductivity.

If conductivity decreases, that means the structure has a crack or has been damaged. The researchers developed algorithms to register damage and determine where that damage is on the structure.

North Carolina State University
Dr. Aku Seppänen via NCSU.edu

"The idea is to identify problems quickly so that they can be addressed before they become big problems and—in the case of some critical infrastructure—so that public safety measures can be implemented," said Dr. Mohammad Pour-Ghaz.

According to Dr. Aku Seppänen, an Academy Research Fellow in the Department of Applied Physics at the University of Eastern Finland and co-author of the paper, determining the damage location is a "challenging mathematical problem."

"We had to develop new computational methods to more reliably determine where the damage is. Ultimately, I think our work represents an advance over previous algorithms in terms of accuracy," Seppänen said.

Small Scale to Big Problems

"The idea is to identify problems quickly so that they can be addressed before they become big problems and—in the case of some critical infrastructure—so that public safety measures can be implemented," Dr. Pour-Ghaz said.

So far, the researchers have tested and demonstrated the sensing skin's accuracy on concrete beams less than a meter wide.

"Our next step is to extend this to large geometrics," Pour-Ghaz said.

"We want to show that this will work on real-world structures."

The researchers' paper, "Electrical impedance tomography-based sensing skin for quantitative imaging of damage in concrete," was published June 18 in the online edition of the journal Smart Materials and Structures.

   

Tagged categories: Colleges and Universities; Concrete; Concrete defects; Infrastructure; Research

Comment Join the Conversation:

Sign in to our community to add your comments.

Wasser High-Tech Coatings Inc.
Wasser Coatings Protect

Wasser Coatings offer a complete range of Moisture Cure Urethane (NEPCOAT approved) systems in addition to Polyurea membranes and linings(NSF).
www.wassercoatings.com


Mitsubishi Gas Chemical America
Performance Amine 1,3-BAC

A highly reactive cycloaliphatic diamine offering superior performance. Reasonable cost and curing efficacy makes it suitable for all types of epoxy resin applications.


PPG Protective and Marine Coatings Group
We Protect and Beautify the World

PPG is widely recognized as a world leader in protective and marine coatings, developing innovative, cutting-edge products and services.


Carboline Company
Fireproofing Solutions

Pyroclad® X1 Thermo-Lag® Pyrocrete® – protecting against hydrocarbon and jet fires, explosions, and cryogenic spills.


Corrosion Probe, Inc.
From Detection to Correction

Corrosion Probe, Inc. has the Most Concrete Coatings Experience and Expertise. Contact us today at
860-767-4402, www.cpiengineering.com


Sherwin-Williams
Sherwin-Williams Water & Wastewater App

Our coatings and linings expertise available 24/7, allowing you to explore the best Sherwin-Williams solutions for your water and wastewater treatment facility. Download today!


Hempel (USA) Inc.
Trusted worldwide for advanced protective coatings

Trusted worldwide
for advanced
protective, coatings
–Full range of 
  advanced coatings
–Optimised application
–Fast, reliable service  worldwide. Contact us at oilandgas@hempel.com


BASF
New resins from BASF will have metals loving water:

Excellent corrosion resistance, low VOC, high gloss, thin films basf.us/industrialcoatings
polyorders@basf.com
800-231-7868


Jotun Paints Inc.
Jotachar JF750 - The Time Saving Solution

The only mesh free solution for jet fire scenarios. Jotachar saves installation time and material costs - the next generation of epoxy passive fire protection.


DRYCO
Humidity & Temperature Control Equipment

Rental Desiccant Dehumidifiers, ArcticDRY Units, Air Conditioners, Heaters and Generators to help control the climate on your next industrial painting project. Nationwide locations, 24/7 service: (866) 379-2600 www.drycogroup.com”

 
 
 
Technology Publishing

The Technology Publishing Network

The Journal of Protective Coatings & Linings (JPCL) PaintSquare
Durability + Design Paint BidTracker

 
EXPLORE:      JPCL   |   PaintSquare News   |   Interact   |   Buying Guides   |   Webinars   |   Resources   |   Classifieds
REGISTER AND SUBSCRIBE:      Free PaintSquare Registration   |   Subscribe to JPCL   |   Subscribe to PaintSquare News
MORE:      About PaintSquare.com   |   Privacy policy   |   Terms & conditions   |   Site Map   |   Search   |   Contact Us
 

© Copyright 2000-2016, Technology Publishing / PaintSquare, All rights reserved
2100 Wharton Street, Suite 310, Pittsburgh PA 15203-1951; Tel 1-412-431-8300; Fax 1-412-431-5428; E-mail webmaster@paintsquare.com