Dyckerhoff TERRAPLAN is a concrete floor system with terrazzo-like appearance. Up to now, TERRAPLAN is mostly used in interiors of prestigious and heavily frequented public buildings such as museums, convention centers or schools. In 2018, TERRAPLAN's formulation has been further developed so that it can now be successfully used outdoors. A particularly high-profile example is the square in front of the Merck Innovation Center in Darmstadt. Titanium dioxide was added to the upper concrete layer. Thus, self-cleaning forces can be triggered under the influence of UV radiation. From an ecological point of view, photocatalysis offers opportunities for air pollution control in cities.