The Effect of Class C Fly Ash on the Water Impermeability of Brick Body

Abstract:

The effect of fluidized fly ash (Tisová, ČEZ Group Czech Republic, class C according to ASTM C618) on the porosity (water absorption, bulk density, capillarity) and water impermeability of brick body used for the production of clay roofing tiles (Wienerberger, Czech Republic). The properties of plastic body (mixing water, drying shrinkage) are discussed too. The addition (10 %wt) of fluidized fly ash in the raw materials mixture for the production of clay roofing tiles generally reduces the sensitivity to the formation of reducing cores during firing thanks to higher porosity of dried green body (higher mixing water) - this is also related to the higher water absorption and capillarity of the fired body and hence to the impaired water impermeability when the fly ash is used.

• Periodical: Solid State Phenomena (Volume 321)
• Pages: 141-147
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.321.141
• Online since: July 2021
• Authors: Radomír Sokolař*, Martin Nguyen, Oldřich Pavelka
• Keywords: Brick Body, Class C Fly Ash, Water Impermeability

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