Pelletized slag cement : autoclave reactivity

  • Hooton R
  • Emery J
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Abstract

Pelletizing, a recently developed processing and product alternative to both foaming and granulating, imparts latent hydraulic properties to iron blast furnace slag, but the physi- cal and chemical factors· influencing these properties have not been previously studied in de- tail. Pelletized slag cement from both Canadian and foreign sources, covering a wide range of chemical compositions, degrees of vitrification (i.e. glass contents) and fineness of grinding have been incorporated as the major binder component in high temperature (185°C) autoclaved pastes. The strengths, porosities and hydrated compositions of these slag-Portland cement- silica binders have been determined, and it is intended to establish relationships between the physical and chemical properties of the original slag cements and the hydrated pastes estab- lished. Over a wide range of proportions, 11.3 ÅTobermorite has been found to be the major hydrated phase and XRD calibration curves were developed for its quantitative analysis. This contribution is primarily concerned with strength development and the hydration products formed in the ternary system of autoclaved, pelletized slag/Portland cement/silica flour

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Authors

  • R D Hooton

  • J J Emery

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