Fly ash in concrete. Scanning electron microscope of a conglomeration of spherical particles of fly ash in the cement matrix of a concrete sample.

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Photo credit: © PATRICK LANDMANN/LERM/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
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Keywords: -life, ash, black, black--white, cement, chemical, chemistry, close-, concrete, conglomeration, conglomerations, construction, earth, electron, fly, geographical, geography, geological, geology, life, material, matrix, micrograph, microscope, mineral, mineralogical, mineralogy, monochrome, nature, sample, samples, scanning, science, sem, specimen, specimens, structure, white