Moisture-Related Problems of Historic Concrete Structure

Abstract:

In the 30's a lot of military defensive lines were built in many European countries (France, Germany and more). These were a sophisticated concrete bunkers protecting the borders of the State. A lot of concrete fortresses were built also in the territory of Czechoslovakia as a protection against Nazi Germany. These bunkers are currently almost 80 years old and they are an important part of the Czech cultural-technical heritage. The paper describes moisture-related failures of the bunker R-S74 which is situated in Eagle Mountains in the Czech Republic with additional material testing of the permeability of used concrete. Present experimental study is unique due to the significant differences in the cement and concrete composition 80 years ago in comparison to the actual state of concrete technology. The results of the laboratory analysis showed that the bunker's concrete is very inhomogeneous and it has very different properties in terms of its permeability.

• Periodical: Materials Science Forum (Volume 865)
• Pages: 219-223
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.865.219
• Online since: August 2016
• Authors: Jiří Pazderka, Magdalena Purkrtová, Pavel Reiterman*
• Keywords: Concrete Permeability, Moisture Content, Rehabilitation

References

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[2] F. Stehlík, V. Kupka, Pěchotní srub Na Holém, Fortprint, Dvůr Králové n.L., (1994).

[3] EN 12390-8 Testing hardened concrete: Depth of penetration of water under pressure, (2009).

[4] R. Barnes, Permeability Testing of Site Concrete, The Concrete Society, Camberley, (2008).