This special concrete promotes the growth of certain types of vegetation. This vegetation provides insulation.UPC “The innovative feature of this new (vertical multilayer) concrete is that it acts as a natural biological support for the growth and development of certain biological organisms, to be specific, certain families of microalgae, fungi, lichens and mosses.” (UPC) Within a year, the building should be covered with vegetation that will change colour throughout the year. Many people believe this will be aesthetically pleasing and I, for one, agree. However, in order to insure that the concrete will last and vegetation will grow, some specific changes had to be made to the makeup of conventional concrete. The natural pH of concrete was made to have a pH of around 8 which is the ideal pH for vegetation growth. UPC
The concrete was made of three distinctive layers:
- The result obtained is a multilayer element in the form of a panel that, in addition to a structural layer, consists of three other layers: the first of these is a waterproofing layer situated on top of the structural layer, protecting the latter from possible damage caused by water seeping through.
- The next layer is the biological layer, which supports colonisation and allows water to accumulate inside it. It acts as an internal microstructure, aiding retention and expelling moisture; since it has the capacity to capture and store rainwater, this layer facilitates the development of biological organisms.
- The final layer is a discontinuous coating layer with a reverse waterproofing function. This layer permits the entry of rainwater and prevents it from escaping; in this way, the outflow of water is redirected to where it is aimed to obtain biological growth. (UPC)