Translucent concrete (also: light-transmitting concrete) is a concrete based building material with optical fibers.
Light is conducted through the stone from one end to the other.
Therefore the fibers have to go through the whole object. This results
into a certain light pattern on the other surface, depending on the
fiber structure. Shadows cast onto one side appear as silhouettes
through the material.[1]light-transmissive properties due to embedded light optical elements — usually
Translucent concrete is used in fine architecture as a façade material and for cladding of interior walls. Light-transmitting concrete has also been applied to various design products.
Several ways of producing translucent concrete exist. All are based on a fine grain concrete (ca. 95%) and only 5% light conducting elements that are added during casting process. After setting, the concrete is cut to plates or stones with standard machinery for cutting stone materials.[1][7]
Working with natural light it has to be ensured that enough light is available. Wall mounting systems need to be equipped with some form of lighting, designed to achieve uniform illumination on the full plate surface. Usually mounting systems similar to natural stone panels are used — e.g., LUCEM uses perforated mounting with visible screws, undercut anchors with agraffes or façade anchors.[7]
From: https://en.wikipedia.org/wiki/Translucent_concrete
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