CEMENT-BASED MULTILAYER ASSEMBLY THAT CAN BE USED AS A BIOLOGICAL SUPPORT FOR BUILDING FACADES OR OTHER STRUCTURES
The invention relates to a cement-based multilayer assembly that can be used as a biological support for building facades or other structures, said assembly comprising: an optionally-newly-installed structural concrete layer (1), an anchoring layer (2), a biological layer (3) made from a cement-based material, and a waterproofing cladding layer (4) including cavities (5) in which the biological layer (3) is in direct contact with the environment. The biological layer (3) is made from traditionally produced concrete or mortar including a retarder- or acid-type chemical additive having a pH of between 5.5 and 8 or from a magnesium-phosphate cement (MPC) containing a phosphate source and a magnesium source. The biological layer (3) includes aggregates of the siliceous or expanded clay type, the maximum size thereof being no bigger than one quarter of the thickness of the layer.