Topmix Permeable is the name of special concrete that has been invented and its specialty is that it can absorb water at the rate of 880 gallons per minute. Now, that is quite a lot. Water falling on surface made with Topmix Permeable gets drained off within seconds.
So, it could be an idle solution for the over flowing roads in Monsoon in India or places getting flooded with water during heavy rains. It can absorb the water and the same water can be harvested and stored underground that can be made to good use later on. Now, Howz that. Watch the video yourself to believe it.
A video of the material being tested in a car park shows the concrete ‘drinking’ 880 gallons (4,000 litres) of water in around a minute, with most of it disappearing almost as soon as it hits the ground.