HARVESTED FLY ASH FOR USE IN CONCRETE
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United States of America Patent
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Issued Date -
Mar 27, 2025
app pub date -
Sep 20, 2024
filing date -
Sep 20, 2024
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Fly ash, a byproduct of coal combustion, has extensive and beneficial use in concrete and cement mixes. Closure of coal-powered power plants has caused a significant reduction in live fly production ash and turned attention of concrete producers to harvested fly ash, which can be excavated from closed coal powered plant's impoundment to satisfy the need in the industry for fly ash. However, challenges arise from the unique qualities of harvested fly ash, which according to the art requires extensive grinding and other processing measures to render it suitable for concrete applications. This invention discloses the use of harvested fly ash in concrete where the particle size percentage of the fly ash is greater than that generally accepted in the art. Also disclosed is a method for use of this harvested fly ash as a supplementary cementitious material in concrete mixes.
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