Depolluting and sanitizing materials

Depolluting and sanitizing materials

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We know that the building sector is responsible for a large share of C.O.V (volatile organic compounds) emissions. But today, manufacturers of materials are putting "intelligent" and environmentally correct materials on the market. It is in the concrete, cement and plaster families that new materials have emerged, particularly innovative.

Self-cleaning concrete

Cement maker Calcia developed the first self-cleaning concrete. It works by photocatalysis, a natural phenomenon by which nanoparticles of titanium dioxide placed on the surface of the concrete destroy organic compounds - and therefore dirt - under the action of the sun's ultraviolet rays. The walls are thus cleaned all alone. This self-cleaning concrete is intended for prefabricated panels and architectural concrete elements. It is, for the moment, mainly used for the construction of public buildings.

The depolluting cement

This cement, also developed by Calcia, also reduces urban pollution by photocatalysis by breaking down organic but also inorganic volatile substances. It acts directly by trapping the gases that come into contact with the cement, and decomposes them by chemical reaction. This makes it possible to reduce, by direct action, a certain quantity of harmful gaseous substances, and by indirect action the formation of ozone. This cement is particularly suitable for the realization of concrete roads, paving, embankment, plaster and exterior coatings and even concrete blocks.

The depolluting coating

Ciment Calcia, again, recently launched a depolluting plaster based on natural lime which preserves the appearance and shade of the local sands, thus helping to preserve the architectural heritage of the regions. Made up of natural hydraulic lime, hydraulic binder, additive and a photocatalyst, it has a depolluting action on nitrogen oxides emitted mainly by urban transport.

The sanitizing placo

Depolluting plasterboard has been specially designed to reduce volatile organic compounds (C.O.V.) present in the ambient air, and in particular formaldehydes, emitted in particular by glues from agglomerated wood, paints, varnishes and household products. Knauf is the company behind these new generation ceiling tiles called Cleano. They are made from zeolite, a volcanic mineral whose crystalline and microporous structure causes a chemical reaction, transforming pollutants into non-dangerous substances such as carbon dioxide and water. The ambient air is thereby significantly purified. These sanitizing plasterboards are autonomous, odorless and act permanently, even when painted. They exist in solid or perforated acoustic plates. Today, Placo also manufactures them under the name of Activ'Air. They can be used like any other plasterboard to mount partitions or make ceilings. They are particularly suitable for places welcoming children or vulnerable people.


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