Electrokinetic Nanoparticle Treatment of Hardened Cement Paste for Reduction of Permeability
Publication: Journal of Materials in Civil Engineering
Volume 18, Issue 4
Abstract
Colloidal nanoparticles were electrokinetically transported into hardened cement paste pores where they underwent chemical reactions resulting in reduced permeability. silica and alumina particles were combined with simulated pore fluids to assess precipitate production. One precipitate formed was , the binder material native to Portland cement paste. Permeability tests were conducted to study the effect of these processes on hardened cement pastes of high water/cement ratio and of high and low alkali contents. It was observed that treatments using of potential applied over a span of is sufficient to drive nanoparticles into the pore system, enabling them to react and produce precipitates. The coefficient of permeability for each paste was reduced by 1–3 orders of magnitude. These findings indicate that reactive nanoparticles can be electrokinetically inserted to reduce the permeability of hardened cement paste, even in the presence of an opposing hydraulic flow.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 18 • Issue 4 • August 2006
Pages: 554 - 560
Copyright
© 2006 ASCE.
History
Received: Aug 3, 2004
Accepted: Apr 19, 2005
Published online: Aug 1, 2006
Published in print: Aug 2006
Notes
Note. Associate Editor: Hilary I. Inyang
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