After Water, Concrete is the most widely used Substance on the Planet. But its Benefits mask enormous Dangers to the Planet, to Human Health – and to Culture itself.
In the Time it takes you to Read this Sentence, the Global Building Industry will have poured more than 19.000 Bathtubs of Concrete. By the Time you are halfway through this Article, the Volume would fill the Albert Hall and spill out into Hyde Park. In a Day it would be almost the Size of China’s Three Gorges Dam. In a single Year, there is enough to Patio over every Hill, Dale, Nook and Cranny in England.After Water, Concrete is the most widely used Substance on Earth. If the Cement Industry were a Country, it would be the third largest Carbon Dioxide Emitter in the world with up to 2.8bn Tonnes, surpassed only by China and the US.The Material is the Foundation of modern Development, putting Roofs over the Heads of billions, fortifying our defences against natural Disaster and providing a Structure for Healthcare, Education, Transport, Energy and Industry.Concrete is how we try to tame Nature. Our Slabs Protect us from the Elements. They keep the Rain from our Heads, the Cold from our Bones and the Mud from our Feet. But they also entomb vast Tracts of fertile Soil, constipate Rivers, choke Habitats and – acting as a rock-hard second Skin – desensitise us from what is happening Outside our Urban Fortresses.Our blue and green World is becoming greyer by the Second. By one calculation, we may have already passed the Point where Concrete outweighs the combined Carbon Mass of every Tree, Bush and Shrub on the Planet. Our built Environment is, in these Terms, outgrowing the Natural one. Unlike the natural World, however, it does not actually Grow. Instead, its chief Quality is to harden and then degrade, extremely slowly.This is a Report from the „theguardian“ here you come to the whole report.Under this Links you will find more interesting Articles on the Topic:Concrete is Tipping us into Climate Catastrophe. It's Payback-TimeThe grey Wall of China: inside the World's Concrete Superpower
Before we come to the Solutions of this imesense Problem, a short Study of the Chinese is prefaced:A Chinese Institute has come to the Conclusion that in China Concrete has already broken down part of the CO2from the Atmosphere.This was tested and confirmed by a German Institute.The Reason for this Fact is based on the Fact that Concrete absorbs some CO2from the Air again when it Decomposes and the large Amount of CO2absorbed by Chinese Concrete is due to the incredibly poor Quality of the Concrete, which crumbles in a very short Time.This cannot be the solution.There are 3 Approaches which, when combined, can solve the Problem.The simple, quick Solution is to use a Construction Method that requires up to 20 times less Concrete, such as the SOTA-DOMUS Technique.In the Production of Cement, CO2is released at two Points, first by burning fossil Fuels, alternatively by burning Waste Materials.The second Point is the Calcification Process itself, which emits as much CO2 as the Heating Process.If we did the Heating Electrically, we would not only have saved 50% CO2Input, but the Process Control of the Calcination could be significantly more Precise and Easier.If the Rotary-Furnaces is operated closed, which is Possible with an Electric Heater, the Resulting CO2could be extracted and would be Available for further use.Since Cement-Plants move large Volumes, it is necessary to have the Rotary-Furnaces wherever the Raw Material is, but through purchase Contracts, even distant Cement-Factories can use the inexpensive, CO2 free Solar-Power.
This new Process is able to Produce Cement completely CO2neutral if CO2neutral Electricity were used for the Electrolysis.This innovative Process is currently still in the Laboratory Stage, but could become a Key-Technology.