Roughly 5,000 years ago, the Egyptians used an early form of concrete to build their magnificent pyramids. Today, concrete is the single most widely used material in the world, with over 2 billion tons of concrete produced every year. As technology has evolved, so have the concrete slabs and mixtures that are offered by full service professional concrete contractors. Now, Tarmac is releasing the newest type of concrete, Topmix Permeable, which is able to absorb and filter large quantities of water. This new concrete, once released, will become one of the most valuable commercial concrete solutions offered by concrete contractors.
The Topmix Permeable concrete is able to filter over 4,000 liters of water in the first 60 seconds, and has an overall absorbency average of 600 liters per minute per meter squared. The concrete has a permeable surface layer, made of large pebbles that allow water to instantly drain. Underneath that layer is a ‘attenuation layer,’ which drains the water directly into a drainage system that connects the water back into the groundwater reservoirs. This helps keep the road safer, and prevents deep pools of water from collecting.
Varying forms of permeable concrete has been around for a while, mostly utilized in pavements and sidewalks to help groundwater drain. However, this is the first time permeable concrete has been strong enough to withstand the weight of motor vehicles. In addition, the Topmix Permeable retains less heat than regular concrete, which can help during the warmer seasons.
Unfortunately, the concrete can get ruined if the water it absorbs freezes. The frozen water would expand, destroying the surface. This means that the current version of this concrete can only be used in places where temperatures stay above freezing point. Topmix Permeable concrete is best for areas that are warm and humid, and experience severe weather conditions such as monsoons or tropical storms.