akbari, author at planet forward - 克罗地亚vs加拿大让球 //www.getitdoneaz.com/author/hakbari/ inspiring stories to 2022年卡塔尔世界杯官网 tue, 07 mar 2023 19:39:45 +0000 en-us hourly 1 https://wordpress.org/?v=6.6.2 cement-free concrete and high-grade minerals from waste //www.getitdoneaz.com/story/cement-free-concrete-and-high-grade-minerals-from-waste/ sat, 02 mar 2013 10:00:56 +0000 http://dpetrov.2create.studio/planet/wordpress/cement-free-concrete-and-high-grade-minerals-from-waste/ more than 136 million tons of coal ash waste materials are being produced to meet the electricity needs of the us each year. however, more than 55% of these wastes are being dumped in the landfills and ash ponds. many studies indicate the presence of a variety of metal oxides such as iron, aluminum and titanium in these wastes. another application envisioned is to make cement-less concrete using these materials to reduce the portland cement consumption which is responsible for 5-8% of total co2 emissions as a greenhouse gas.

the main objective of this study was to develop a novel flowsheet for extracting valuable metal oxides from coal ash wastes and to develop a suitable process to utilize them as a useful product in the form of a cement-less concrete. we used totally waste materials to produce some useful metals and also cement-less concrete with much less carbon footprint. we not only left nothing behind as waste but also helped the climate and prevented global warming by decreasing carbon dioxide production.

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