What is cement ash?
When coal and waste are burned in power plants, they create a non -flammable by -product called coal ash. Two different types of ash particles are coal ash: the lower ash that gather at the bottom of the coal furnaces and fly ash, which is caught in that. The vast majority of non -flammable material is fly ash that travels in the smoke gas and is caught in chimneys and chimney. This rest must be regularly cleaned and destroyed. One way to reuse this material is a combination with other materials to create cement of fly ash. Skinker is a material usually made of limestone and minerals that are crushed and crushed and then heated. Calcium sulphate is added and the clinker breaks into cement powder. The process requires a large amount of energy; It has a huge carbonprint and represents approximately 7% to 8% of carbon dioxide emitted each year. The materials that make up fly ash are puzzles, which means that they can be used to bind - or cement - materials together. BackgroundMaterials, including the cement of fly ash, add concrete resistance and strength.
Ash cement is also known as green concrete. It binds toxic chemicals that are present on the fly ash in a way that should prevent them from contaminating natural resources. The use of ash cement uses less energy instead of Portland cement, requires less invasive mining and reduces both resource consumption and CO2 emissions.
Although this is not considered to be a dangerous material of American environmental professionalism agency (EPA), fly ash may include a significant amount of toxic materials. There were incidents in which the ashes were leached to the groundwater, causing cancer, congenital defects and other health problems. In many regions, there are no regulations or monitoring requirements for companies that create and destroy ash. Ash that is not used to produce products such as cement afterPilk is often destroyed in landfills and abandoned mines.
It is currently unknown whether the cement of the fly ash leaches chemicals into the air or ground; There is no data about what can happen in the future when concrete made from fly ash and fly ash eroda. Several environmental agencies, such as EPA, management in the field of energy and environmental design (LeED) and California cooperation for high -performance schools (CHPS), set the limits of the acceptable level of mercury in the ashes of ash. We hope that by reducing some of the most dangerous chemicals found, potential future problems can be minimized.