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What is the environmental impact of using fly ash and silica fume as sustainable alternatives in various industries?

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The environmental impact of utilizing fly ash and silica fume as sustainable alternatives in various industries is significant. Fly ash, a by-product of coal combustion in thermal power plants, poses environmental challenges when released into the atmosphere . On the other hand, silica fume, a by-product of the ferrosilicon and silicon industry, can be reused to produce high-strength concrete, reducing the negative impact of waste disposal on the environment . Incorporating fly ash and silica fume in concrete mixtures can enhance sustainability by reducing the environmental burden associated with traditional concrete production. Studies show that using fly ash as a cement substitute can decrease the global warming potential of concrete significantly, especially when high calcium oxide fly ash is employed . Additionally, the bond strength of ribbed reinforcing bars in fly ash and silica fume blended concrete mixes indicates the potential for developing environmentally sustainable concrete through these alternative materials .

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Open access•Journal Article•DOI Sustainable Consideration of Concrete using GGBFS and Fly Ash Anand Mahajan 30 Apr 2023-International Journal For Science Technology And Engineering	Not addressed in the paper.
Open access•Journal Article•DOI Utilization of Fly Ash for Sustainable Environment Management Haldia Energy Limited, Haldia, West Bengal, India Sanjoy Kumar Chakraborty 30 Dec 2022	Fly ash, a byproduct of coal burning, poses environmental risks when released. Silica fume, another industrial waste, can be used as a sustainable alternative in various industries to mitigate environmental impacts.
Open access•Posted Content•DOI Bond Strength of Fly Ash and Silica Fume Blended Concrete Mixes 30 Jun 2023	Incorporating fly ash and silica fume in concrete mixes can enhance bond strength, offering environmentally sustainable alternatives for construction industry, reducing carbon footprint and promoting eco-friendly practices.
Journal Article•DOI Comparative environmental assessment of low and high CaO fly ash in mass concrete mixtures for enhanced sustainability: Impact of fly ash type and transportation. Christian Orozco, Somnuk Tangtermsirikul, Takafumi Sugiyama, Sandhya Babel - Show less +3 more 01 Jul 2023-Environmental research	Not addressed in the paper.
Open access•Journal Article•DOI Effect of silica fume on the properties of sustainable cement concrete Hussein M. Hamada, Farid Abed, Herda Yati Binti Katman, Ali M. Humada, Mohammed S. Al Jawahery, Ali Majdi, S Yousif, Blessen Skariah Thomas - Show less +7 more 01 May 2023-Journal of materials research and technology 1 Citations	Not addressed in the paper.

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Issues on concrete regarding enviromental impact5 answersConcrete production has a significant environmental impact due to the emission of greenhouse gases and the consumption of natural resources such as water. The manufacture of cement, a key component of concrete, contributes to CO2 emissions and increases global temperatures. Concrete waste can also have ecotoxic effects on the environment, especially when leachates are released. The large consumption of concrete and its components, along with energy-intensive production processes, contribute to carbon dioxide emissions. To address these issues, various strategies can be implemented, such as using supplementary cementitious materials, optimizing clinker content, and incorporating recycled waste materials and nanoparticles into concrete mixtures. Additionally, finding alternatives to current concrete components and adopting greener technologies in the construction process can contribute to more sustainable concrete production. Identifying and considering factors such as concrete class, structural loads, materials used, and volume of structural elements can help reduce the environmental impact of concrete structures.

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