Extreme heat ? Discover this artificial grass that cools itself

© Mike Fallarme/Pexels

The inevitable rise in global temperatures; although this summer is particularly mild in France; forces us to fundamentally rethink our urban infrastructure. Among all of these, sports infrastructure and their management is a particularly thorny issue, with excessive summer heat threatening to inflict burns and exhaustion on athletes.

It is in this very worrying context that an invention that is at least original emerges: an artificial turf with self-propelled properties -refreshing. Already adopted by certain metropolises such as Amsterdam, London or Kobe, the device appears, at first glance, to be rather well thought out.

A somewhat special artificial lawn& ;nbsp;: freshness in the heart of summer

Taking inspiration from blue roofs, this new generation of synthetic turf is based on a very simple principle. It captures rainwater, which it stores in imposing reservoirs hidden beneath its surface. When temperatures rise, this water gradually evaporates, causing a natural cooling of the lawn. A process ultimately very similar to that of natural grass.

The tanks storing rainwater have a fairly impressive capacity: no less than 512,000 liters of water. #8217;water can be stored under a football field with standard dimensions. Thanks to them, this grass can maintain temperatures well below critical thresholds. Field tests have demonstrated that surfaces equipped with this innovative system never exceeded 37°C, a difference of 1.7°C compared to a natural grass pitch.

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An effective response to climate disruption ?

Global warming brings in its wake a set of very worrying phenomena, including an alarming increase in heat waves and fires. These put a strain on both natural lawns and conventional synthetic surfaces.

Indeed, under the action of heat, synthetic turf sports fields can see their surface literally melt. Made of plastic materials (often polyethylene or polypropylene), if they are exposed to intense sunlight, without shading or cooling, they can reach extreme temperatures, around 70°C. These are more than sufficient to deteriorate the plastic fibers and transform them into a sticky and burning mass.

This grass is a rather interesting innovation, even if it remains difficult to imagine our cities covered with it. On the other hand, for very restricted areas, Results show it does its job very well.

• As temperatures rise, we need to rethink some of our urban infrastructure, including sports areas.
• A number of cities have adopted a new type of self-cooling synthetic turf, inspired by blue roofs.
• This turf stores rainwater to cool the surface, preventing pitches from melting in the heat.

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