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Interaction of alkali and alkali earth metal hydroxides with microsilica

Kendrick, D.A. / Parsonage, J.R. / Vazifdar, R.

Microsilica is inert to trimethylsilylation unless activated by alkaline conditions. In a sodium hydroxide-microsilica model system that simulates the alkaline conditions present in Portland cement, microsilica can be activated to produce polyorganosiloxanes. A calcium hydroxide-micro-silica model system is shown to possess pozzolanic reactivity, and calcium hydroxide reacts with microsilica to form an intermediate C-S-H gel that also can be trimethylsilylated to produce polyorganosiloxanes.

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Interaction of alkali and alkali earth metal hydroxides with microsilica

Kendrick, D.A. / Parsonage, J.R. / Vazifdar, R.

Microsilica is inert to trimethylsilylation unless activated by alkaline conditions. In a sodium hydroxide-microsilica model system that simulates the alkaline conditions present in Portland cement, microsilica can be activated to produce polyorganosiloxanes. A calcium hydroxide-micro-silica model system is shown to possess pozzolanic reactivity, and calcium hydroxide reacts with microsilica to form an intermediate C-S-H gel that also can be trimethylsilylated to produce polyorganosiloxanes.

Interaction of alkali and alkali earth metal hydroxides with microsilica

Kendrick, D.A. / Parsonage, J.R. / Vazifdar, R.

Microsilica is inert to trimethylsilylation unless activated by alkaline conditions. In a sodium hydroxide-microsilica model system that simulates the alkaline conditions present in Portland cement, microsilica can be activated to produce polyorganosiloxanes. A calcium hydroxide-micro-silica model system is shown to possess pozzolanic reactivity, and calcium hydroxide reacts with microsilica to form an intermediate C-S-H gel that also can be trimethylsilylated to produce polyorganosiloxanes.

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Title:

Interaction of alkali and alkali earth metal hydroxides with microsilica

Contributors:

Kendrick, D.A. (author) / Parsonage, J.R. (author) / Vazifdar, R. (author)

Published in:

Cement and Concrete Research ; 28 ; 1537-1544

Publication date:

1998

Size:

8 Seiten, 24 Quellen

ISSN:

DOI:

https://doi.org/10.1016/S0008-8846(98)00139-2

Type of media:

Article (Journal)

Type of material:

Print

Language:

English

Keywords:

Siliciumoxid , Portlandzement , Silicon (Polymer) , Gel , Mikrosilica , anorganische Verbindung , Polysiloxan , Si-Stoff

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