Fly ash is a fine gray powder that consists of round, glassy particles produced as a result of combustion in coal-fired or thermal power stations. It is by far one of the largest wastes generated today. It contains harmful substances like arsenic, lead, mercury, etc. Therefore, releasing it into the environment will have detrimental effects. Thankfully, instead of going into landfills, it is put to highly productive use. Fly ash has pozzolanic properties. This means it reacts with lime and forms cementitious compounds, also known as Supplementary Cementitious Material. When the fly ash is blended with the cement constituents, like sand and aggregates, it fills tiny spaces within the mixture and forms an extremely cohesive and consistent substance.
The environmental impact of coal ash or fly ash is significant. Some thermal power plants dispose it off in landfills or surface impoundments. Others put it into abandoned mines. Nevertheless, the best course of action is to recycle it. For a long time now, due to its cementitious properties, fly ash has been used in concrete, grout, etc. Another widespread use of fly ash has been as fill material to stabilize roadbeds. Even bottom ash is used for the same purpose and also to control the snow on roads. Recycling fly ash reduces greenhouse gas emissions. Consequently, it is better to repurpose it and put it to good use.
Due to its cementitious properties, fly ash makes for a suitable building additive. Left alone, discarding this by-product will only harm the environment. Nevertheless, using it as an SCM (Supplementary Cementitious Material) makes for stronger and sharper roads, buildings, dams, etc. Hence, learning the alternative uses of fly ash is to everybody’s advantage.
The post What Are The Pros And Cons Of Fly Ash Cement? appeared first on PermuTrade.
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