Vienna University of Technology: Nanoparticles can Save Historic Buildings

Vienna University of Technology: Nanoparticles can Save Historic Buildings. “Many historical buildings were built of limestone, such as Vienna’s St. Stephen’s Cathedral. Limestone is easy to work with, but does not withstand weathering well. It consists mainly of calcite minerals that are relatively weakly bound to each other, which is why parts of the stone keep crumbling away over the years, often requiring costly restoration and conservation treatments. However, it is possible to increase the resistance of the stone by treating it with special silicate nanoparticles.”

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