Performance of permeability-reducing admixtures in marine concrete structures

Dao, Vinh T. N., Dux, Peter F., Morris, Peter H. and Carse, Alan H. (2010) Performance of permeability-reducing admixtures in marine concrete structures. ACI Materials Journal, 107 3: 291-296.

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Name Description MIMEType Size Downloads
Author Dao, Vinh T. N.
Dux, Peter F.
Morris, Peter H.
Carse, Alan H.
Title Performance of permeability-reducing admixtures in marine concrete structures
Journal name ACI Materials Journal   Check publisher's open access policy
ISSN 0889-325X
1944-737X
Publication date 2010-05
Sub-type Article (original research)
Volume 107
Issue 3
Start page 291
End page 296
Total pages 6
Place of publication Farmington Hills, MI, United States
Publisher American Concrete Institute
Collection year 2011
Language eng
Abstract The use of permeability-reducing admixtures is a potential preventative of the chloride-induced corrosion of steel reinforcement, which is the main cause of the deterioration of concrete structures exposed to coastal environments. This paper presents an experimental investigation into the effectiveness of two typical commercially available permeability-reducing admixtures: one characterized by crystallization activity and the other by hydrophobic and pore-blocking effects. Concrete specimens were exposed to simulated coastal environments, and chloride concentration profiles at 28-, 365-, and 730-day exposures were determined by X-ray fluorescence spectrometry. The results suggested that the incorporation of the admixture, characterized by hydrophobic and pore-blocking effects, appeared to considerably enhance the concrete durability with respect to chloride-induced corrosion. The inclusion of the admixture characterized by crystallization activity however, seemed to have almost no detectable effect. This implies the necessity of exercising a degree of caution during specification. Copyright © 2010, American Concrete Institute. All rights reserved.
Keyword Chloride-induced corrosion
Coastal environment
Durability
Permeability-reducing admixture
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
Official 2011 Collection
 
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Created: Sun, 20 Jun 2010, 00:08:49 EST