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Researchers Develop New Corrosion ID Methods

Wednesday, July 1, 2020

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In conjunction with the Austrian Society for Construction Technology (ÖBV), researchers at Graz University of Technology (Graz, Austria), are working on a new method of assessing the condition of concrete structures.

The method—high-resolution luminescent analyses of construction materials, or LumAConM—enables a detailed assessment of the condition of concrete structures on site, as well as laboratory measurements.

This allows the service life and any problem areas to be assessed more quickly and precisely than is possible with currently available methods of analysis, according to the university.

The researchers also hope that the new method will provide them with a better understanding of the course of essential corrosion processes.

Graz University of Technology

In conjunction with the Austrian Society for Construction Technology (ÖBV), researchers at Graz University of Technology (Graz, Austria), are working on a new method of assessing the condition of concrete structures.

"This knowledge enables targeted and cost-effective refurbishment and is essential for the development of new, sustainable and durable materials," said Florian Mittermayr, researcher at the Institute of Technology and Testing of Construction Materials at TU Graz.

The Research

The basis for the research is optical-chemical sensor technology, which until now had been used primarily in biotechnology and medical technology.

"We now want to use the tool to assess the condition of concrete infrastructure and thus develop a completely new generation of sensors for the construction industry," said Bernhard Müller, chemist at the Institute of Analytical Chemistry and Food Chemistry.

Researchers have used this to measure the pH value in cement-based materials, for instance, which is a measurement that can usually indicate corrosion.

According to researchers, the measuring system consists of a plastic film with a water-absorbent polymer layer that contains an indicator dye and a reference dye. The wet film is applied to the sample and the pH distribution images are then generated with the aid of a special camera.

This technique has reportedly already been able to detect changes in the pH value in various building materials and, in the LumAConM project, the measurement system is now to be further developed.

The goal is that by the end of 2022, it will result in a versatile measurement technology. However, researchers are also looking into expanding the measuring system to other parameters such as chloride instead of pH.

   

Tagged categories: concrete; Corrosion; EMEA (Europe, Middle East and Africa); EU; pH testing; Research and development; Tools & Equipment

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