Able to absorb up to 4,000 liters of water within the first 60 seconds, Tarmac has create a new type of porous concrete. Named the Topmix Permeable, this new porous concrete works by having a permeable layer on the surface made up of “relatively large pebbles through which water can drain almost instantly.” An ‘attenuation layer’ follows this, which allows for the water to get fed into a city’s drainage system and groundwater reserves. 

Not only can the super-absorbent concrete be used in conjunction with existing concrete – cities can install it so the runoff from regular concrete is fed into the Topmix Permeable – but it will also be significantly cooler than regular concrete during the hottest months of the year. 

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