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Increase of Service Life of Reinforced Concrete Structures in Marine Environment by Water Repellent Treatment



Title: Increase of Service Life of Reinforced Concrete Structures in Marine Environment by Water Repellent Treatment
Author(s): Zhao Tie-jun, Wittmann Folker H. and Li Weihua, Zhang Peng
Paper category : conference
Book title: International RILEM Conference on Advances in Construction Materials Through Science and Engineering
Editor(s): Christopher Leung and K.T. WAN
ISBN: 978-2-35158-116-2
e-ISBN: 978-2-35158-117-9
Publisher: RILEM Publications SARL
Publication year: 2011
Pages: 486 - 492
Total Pages: 7
Nb references: 6
Language: English


Abstract: Capillary absorption is a powerful mechanism to transport water and aggressive chemical compounds dissolved in water deep into the pore space of concrete in a short time. At a later stage chlorides and sulfates migrate further by the comparatively slow process of diffusion. The quick ingress of aqueous salt solutions into concrete can be reduced if not suppressed totally by water repellent treatment. Then the long lasting process of diffusion cannot take place. There are two basically different techniques of water repellent treatment: (a) the surface can be impregnated by a water repellent agent such as silane or (b) a water repellent agent can be added to the fresh mix to produce integral water repellent concrete. In this contribution it is shown that chloride penetration into concrete can be drastically reduced by water repellent treatment. It will also be shown that capillary action of fine cracks can be inactivated by water repellent treatment. Service life of reinforced concrete structures in marine environment can be extended significantly by water repellent treatment.


Online publication: 2011-10-31
Publication type : full_text
Public price (Euros): 0.00


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