Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Innovative developments and conservation concepts for architectural glass

16.09.2016

Glass related R&D at the Fraunhofer Institute for Silicate Research ISC covers a broad spectrum from specialty glass for technical applications to glass surface finishing with functional or decorative coatings. It also includes concept designs for the restoration and preservation of historic glass paintings or other glass items of cultural heritage. A recent project, for example, regarded the conservation of the glass façade of the public indoor swimming pool located at Stuttgart Feuerbach. At glasstec, held from 20th to 23th September 2016, the Institute will present this and other selected R&D results at the Fraunhofer booth D64 in hall 11.

Conservation concept for the glass façade of the public swimming pool building at Stuttgart Feuerbach


Crystalline deposits fog the painted glass panes like a white veil.

© K. Selsam-Geißler, Fraunhofer ISC


The public swimming pool building at Stuttgart Feuerbach features a double glazed façade which displays massive signs of corrosion due to edge seals that have given way.

© Regierungspräsidium Stuttgart - Landesdenkmalpflege

The concept was designed by a team of researchers from the International Convention Center for Cultural Heritage Preservation IZKK which is part of the Bronnbach Branch of the Fraunhofer ISC. The façade of the public swimming pool building at Stuttgart Feuerbach features a double glazing which displays obvious signs of corrosion. Of particular concern are the colored glass elements which were painted by the artist HAP Grieshaber between 1959 and 1964.

In order to prevent further damage to the artistically valuable façade, the authorities in charge (Hochbauamt Stuttgart) commissioned the Fraunhofer ISC to design a suitable conservation concept and also to develop an effective protection coating for subsequent conservation of the restored façade.

To find the best suited long-term concept for cleaning, restoring, and conserving the glass paintings, the IZKK researchers analyzed sample panes of the façade glazing. Analysis methods included light microscopy, cross section preparation and a combination of X-ray spectroscopy and scanning electron microscopy. An unpainted sample glass pane was used to determine the composition of the glass and to analyze the glass surface, the composition of the paint was analyzed from a painted glass pane.

The investigation revealed crystalline deposits of calcium and sodium silicate compounds which fogged the pane like a white veil and so not only impaired the view but also covered the color paintings. The leaching took form in massive glass corrosion between the double glazing. In some areas the corrosion depth reached 20 micrometers. The edge seal of the insulating glass had given way and so made room for condensation between the panes of the double glazing. Glass components began to leach out and corrosion products to accumulate, until the surface of the glass was partly dissolved.

Based on these results, a tailored concept was designed to carefully clean the façade without affecting the color paintings. The IZKK team then went on to develop a special protection coating which they tested on self-made glass samples matching the façade elements. These measures are meant to preserve the transparency of the façade and to improve the »readability« of the glass paintings. In order to prevent further corrosion, the façade panes are to be reincorporated into double glazings using latest standards and technology.

Glass finishing and coating

Apart from such glass conservation concepts, Fraunhofer ISC develops functional coatings for architectural glazings. Dust-repellent and anti-reflective properties can be combined in one single coating. The coating creates a special glass surface structure which provides for self-cleaning through wind and rain. This finishing system has already stood the test of time on external glazings of the Cologne Cathedral. Another special coating was developed for window panes to improve the lighting condition of indoor rooms. The coated window panes promote the passage through the glass of those wavelengths of light that govern our hormonal balance and have a positive effect on our biorhythm.

Indoor climate control is another important research topic of the Fraunhofer ISC. A recent development features highly porous glass flakes which can absorb, store, and release excess moisture to regulate indoor air humidity. Incorporated into plaster or wall paint, the glass flakes help maintain a comfortable indoor climate and prevent mildew and mold.

Weitere Informationen:

http://www.isc.fraunhofer.de
http://www.izkk.de

Marie-Luise Righi | Fraunhofer-Institut für Silicatforschung ISC

More articles from Trade Fair News:

nachricht Bug-proof communication with entangled photons
22.06.2017 | Fraunhofer-Gesellschaft

nachricht LZH at the LASER World of Photonics 2017: Light for Innovation
16.06.2017 | Laser Zentrum Hannover e.V.

All articles from Trade Fair News >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Can we see monkeys from space? Emerging technologies to map biodiversity

An international team of scientists has proposed a new multi-disciplinary approach in which an array of new technologies will allow us to map biodiversity and the risks that wildlife is facing at the scale of whole landscapes. The findings are published in Nature Ecology and Evolution. This international research is led by the Kunming Institute of Zoology from China, University of East Anglia, University of Leicester and the Leibniz Institute for Zoo and Wildlife Research.

Using a combination of satellite and ground data, the team proposes that it is now possible to map biodiversity with an accuracy that has not been previously...

Im Focus: Climate satellite: Tracking methane with robust laser technology

Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.

Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...

Im Focus: How protons move through a fuel cell

Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.

As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...

Im Focus: A unique data centre for cosmological simulations

Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.

With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...

Im Focus: Scientists develop molecular thermometer for contactless measurement using infrared light

Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine

Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Plants are networkers

19.06.2017 | Event News

Digital Survival Training for Executives

13.06.2017 | Event News

Global Learning Council Summit 2017

13.06.2017 | Event News

 
Latest News

Quantum thermometer or optical refrigerator?

23.06.2017 | Physics and Astronomy

A 100-year-old physics problem has been solved at EPFL

23.06.2017 | Physics and Astronomy

Equipping form with function

23.06.2017 | Information Technology

VideoLinks
B2B-VideoLinks
More VideoLinks >>>