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Effect of age on diffusion in hydrated alite cement
Hydration of alite cement paste of 0.59 water/cement ratio caused the larger pores (greater 50 nm) to progressively fill with calcium hydroxide and a porous calcium silicate hydrate gel. At early stages of hydration, the larger pores were directly interconnected and diffusion rates were consequently rapid. At later times, the hydrate shells around the adjacent alite grains began to intergrow, continuity of the larger pores was reduced, and diffusion rates were reduced. Beyond 70 % hydration, diffusion rates diminished very rapidly with only small amounts of additonal hydration. The reduction in continuity of the larger pores was monitored directly by microscopic examination of resin replicas of the pores.
Effect of age on diffusion in hydrated alite cement
Hydration of alite cement paste of 0.59 water/cement ratio caused the larger pores (greater 50 nm) to progressively fill with calcium hydroxide and a porous calcium silicate hydrate gel. At early stages of hydration, the larger pores were directly interconnected and diffusion rates were consequently rapid. At later times, the hydrate shells around the adjacent alite grains began to intergrow, continuity of the larger pores was reduced, and diffusion rates were reduced. Beyond 70 % hydration, diffusion rates diminished very rapidly with only small amounts of additonal hydration. The reduction in continuity of the larger pores was monitored directly by microscopic examination of resin replicas of the pores.
Effect of age on diffusion in hydrated alite cement
Alterseffekt auf die Diffusion in hydratisiertem Alite-Zement
Parrott, L.J. (author) / Patel, R.G. (author) / Killoh, D.C. (author) / Jennings, H.M. (author)
Journal of the American Ceramic Society ; 67 ; 233-237
1984
5 Seiten, 10 Bilder, 2 Tabellen, 14 Quellen
Article (Journal)
English
DIFFUSION , ALTERN (WERKSTOFF) , ZEMENT , WASSER , POROSITAET , CALCIUM , HYDROXID , SILICAT , KORNGRENZE , MIKROSKOPIE , CHEMISCHE ZUSAMMENSETZUNG , FESTSTOFFDICHTE , THERMOANALYSE , GRAVIMETRIE , STRUKTURANALYSE , MINERAL , HYDRAT , SPEZIFISCHE OBERFLAECHE , ALIT , GEBUNDENES WASSER
Effect of age on diffusion in hydrated alite cement
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