Nanoparticles can save historic buildings made from porous rock

Posted On: 2022-08-08

Many historical buildings were built of sandstone. Sandstone is easy to work with, but does not withstand weathering. It consists of sand grains that are relatively weakly bonded to each other, which is why parts of the stone crumble away over the years, often requiring costly restoration. However, it is possible to increase the resistance of the stone by treating it with special silicate nanoparticles.