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| Papers and Reports |
Water Permeability vs Waterproof - by Patrick F. McGrath, Ph.D.
![Water Permeability vs Waterproof - by Patrick F. McGrath, Ph.D.]()
The paper presents a general overview of the reasons for reducing the permeability of concrete structures. The various mechanisms by which water, and aggressive ions move into or through concrete are reviewed. Basic categories of barrier systems are defined and expanded.
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Xypex Prevents Ingress of Chlorides and Protects Steel Reinforcement from Corrosion
![Xypex Prevents Ingress of Chlorides and Protects Steel Reinforcement from Corrosion]()
De-icing salts when dissolved in a solution allow chlorides to migrate through concrete structures resulting in ultimate rapid rusting of steel reinforcement. A parallel situation exists in a marine environment with sea water/spray on exposed areas of reinforced concrete.
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Crystalline Barriers
![Crystalline Barriers]()
This technique is based upon organic acids, salts of acids and bases which form substantially insoluble complexes with ions selected from the group consisting of calcium and aluminum ions.
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