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File:Fly Ash FHWA dot gov.jpg

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Fly_Ash_FHWA_dot_gov.jpg (347 × 274 pixels, file size: 22 KB, MIME type: image/jpeg)

Summary

Description
English: 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 generally spherical, typically ranging in size between 10 and 100 micron (see Figure).
  • These small glass spheres improve the fluidity and workability of fresh concrete.
  • Fineness is one of the important properties contributing to the pozzolanic reactivity of fly ash.
Français : Les cendres volantes sont généralement plus fines que le ciment portland ou la chaux. Une grande partie des particules qui composent ces cendres sont de la taille de celle d'un limon argileux, mais généralement sphérique, mesurant de 10 à 100 microns, incluant de petites sphères qui améliorent la fluidité et la maniabilité du béton frais auquel on a ajouté ces cendres. La petite taille de ces particules expliquent certaines de leurs propriétés qui contribuent à la réactivité pouzzolanique des cendres volantes
Date
Source http://www.fhwa.dot.gov/PAVEMENT/recycling/fach01.cfm
Author United States Department of Transportation - Federal Highway Administration
Permission
(Reusing this file)		 US government: United States Department of Transportation - Federal Highway Administration

Licensing

Public domain This image is a work of a United States Department of Transportation employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image is in the public domain.

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Captions

PAWAN KUMAR SAINI बानसूर,अलवर,राजस्थान,301402

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inception

14 July 2006

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current23:35, 23 March 2009Thumbnail for version as of 23:35, 23 March 2009347 × 274 (22 KB)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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