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Home  >  Journal list  >  Journal of the Society of Materials Science, Japan  >  Vol.59  No.9 (2010)  >  pp.720-725

Journal of the Society of Materials Science, Japan
<<Previous article Vol.59  No.9 (2010)   pp.720 - 725 Next article>>

Performance of Silane-Type Impregnant and Flexible Polymer-Modified Cementitious Coating Material on Actual Structures after Long Term Exposure

Mikio WAKASUGI1), Makoto YAMAMOTO1), Hiroyuki SAKAKIBARA2) and Toyoaki MIYAGAWA3)
1) Costruction Material Div., SOC Co. Ltd.
2) Cement Concrete Res. Lab., SOC Co. Ltd.
3) Dept. of Civil & Earth Resources Eng., Kyoto Univ.


Core specimens are drilled from the concrete structures repaired by silane-type impregnant and flexible polymer modified cementitious coating materials (PCM) after long term exposure to investigate the performance of those repair materials. Physical properties of the materials are measured and instrumental analysis are conducted to observe the condition of cement particles hydration and polymer film formation. Silane-type impregnant still maintains the performance after 20years at the impregnated depth of 2∼10mm, also flexible PCM is more waterproof and water vapor permeable than initial. Adhesive strength of flexible PCM increased to twice the initial value after 5years, and maintains the performance after 20years. Elongation of the flexible PCM increased after 20years although it decreased after 2years. Hydration of cement didn't almost proceed and the polymer film had almost no damages after 20years.


Keyword:
Silane-type impregnant, Flexible polymer-modified cement, Repair of concrete, Water permeability, Vapor permeability, Adhesive strength, Elongation

Received: November 02, 2009
Published online: September 18, 2010
Copyright (c) 2010 by The Society of Materials Science, Japan

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