File:Fly Ash FHWA dot gov.jpg

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	23:35, 23 March 2009		347 × 274 (22 KB)	commons>Shinkolobwe	{{Information \|Description={{en\|1=Photomicrograph made with a Scanning Electron Microscope (SEM): Fly ash particles at 2,000x magnification. Fly ash is typically finer than portland cement and lime. Fly ash consists of silt-sized particles which are gener

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