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

doi:10.1016/j.cemconres.2009.06.010

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 journal › Article › peer-review

28 Citations (Scopus)

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 language	English
Pages (from-to)	843-848
Number of pages	6
Journal	Cement and Concrete Research
Volume	39
Issue number	10
DOIs	https://doi.org/10.1016/j.cemconres.2009.06.010
Publication status	Published - Oct 2009

Keywords

Cement paste
Rheology
Thermal treatment
Waste paper sludge

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10.1016/j.cemconres.2009.06.010

Cite this

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title = "Effect of activation conditions of a kaolinite based waste on rheology of blended cement pastes",

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). {\textcopyright} 2009 Elsevier Ltd. All rights reserved.",

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AU - Banfill, P. F G

AU - Rodríguez, O.

AU - Sánchez de Rojas, M. I.

AU - Frías, M.

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AB - 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.

KW - Cement paste

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KW - Thermal treatment

KW - Waste paper sludge

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JO - Cement and Concrete Research

JF - Cement and Concrete Research

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ER -

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

Abstract

Keywords

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