Found a unique substitute for cement

Cities around the world are expanding faster and faster, which leads to further increase in demand for one of the most popular building materials. Talking about cement. Statistics show that in China alone over the last three years were used about the same amount of cement as in the United States was spent for the past century. But there is one problem. Because of the cement gets into the atmosphere huge amounts of carbon dioxide.

The process of making cement which is the binder for concrete, is a resource-intensive and promotes the release of CO2. That's why researchers from around the world are searching for substitutes. One of the most promising substitutes was recently discovered by accident: in the course of a failed experiment. Working with waste metallurgical plant (metal dust) and carbon dioxide, chemist David stone accidentally created a very solid glassy material that were similar in mechanical properties to the concrete.



The original stone was considered the experiment a failure and even threw away the prototype, but after several days it was found that the material gained increased strength. Tests have shown that it is even more durable than concrete. Stone notes that the material hardens only when exposed to high concentrations of carbon dioxide is absorbed and neutralized. This greenhouse gas reacts with the iron, creating iron carbonate and becoming part of the mineral matrix material.published

Source: green-dom.info/