Manufacturing of cement emits huge amount of CO2 to the atmosphere. Cement manufacturing and concreting leads the major green house effect. Cement industry contributes about 5% to global anthropogenic CO2 emissions, making the cement industry an important sector for CO2-emission mitigation strategies.Different research is being carried out worldwide for substitute. In the year 1970, Joseph Davidovits invented Geo-polymer, a substitute of cement and concrete which is being used in several construction. Its production doesn’t require any heating and no CO2 is being emits. The main raw materials are Sodium Silicate and Sodium Hydroxide and major different waste material. Chemical bond is formed between the waste material by chemical activation. Research is needed more to develop the material industrial and it is going on.
Recently, green cement is developed. This new cement based on magnesium oxide which will address the carbon problem faced by the cement industry, and as a result will contribute significantly to an overall shift to a low carbon world. CO2 generated being recycled back in the process in this case. One of such is Novacem cement demonstrates performance which is already good enough for several significant applications (e.g., masonry products), and which is continually being optimized and improved.
Lot of research is needed and goverment should take necessary action for this type of research to keep the world healthy.
Thanks to: http://crazetoday.com/green-ary/reducing-and-capturing-co2-from-atmosphere-through-concreting-cement-manufacturing/
