Effect of activation conditions of a kaolinite based waste on rheology of blended cement pastes

P. F G Banfill, O. Rodríguez, M. I. Sánchez de Rojas, M. Frías

Research output: Contribution to journalArticle

Abstract

This paper reports the influence of calcining temperature on the rheology of blended cement pastes with 10 and 20% of thermally activated paper sludge as pozzolan at water/binder ratio of 0.5 and 0.4. The kaolinite based waste was activated at different activation temperatures (700-800 °C) and retention times of 2 and 5 h. The yield stress of the blended pastes increased when the activation intensity increased as a result of the increased calcite and free lime content. Due to the stiffness of the blended pastes, a superplasticiser (sodium lignosulfonate) was used in order to reduce the yield stress. The best results could be obtained using the lower calcining temperature (700 °C and 2 h). © 2009 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)843-848
Number of pages6
JournalCement and Concrete Research
Volume39
Issue number10
DOIs
Publication statusPublished - Oct 2009

Fingerprint

Kaolinite
Rheology
Cements
Chemical activation
Yield stress
Pozzolan
Calcite
Lime
Temperature
Binders
Sodium
Stiffness
Water

Keywords

  • Cement paste
  • Rheology
  • Thermal treatment
  • Waste paper sludge

Cite this

Banfill, P. F G ; Rodríguez, O. ; Sánchez de Rojas, M. I. ; Frías, M. / Effect of activation conditions of a kaolinite based waste on rheology of blended cement pastes. In: Cement and Concrete Research. 2009 ; Vol. 39, No. 10. pp. 843-848.
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Effect of activation conditions of a kaolinite based waste on rheology of blended cement pastes. / Banfill, P. F G; Rodríguez, O.; Sánchez de Rojas, M. I.; Frías, M.

In: Cement and Concrete Research, Vol. 39, No. 10, 10.2009, p. 843-848.

Research output: Contribution to journalArticle

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