^ Stalactitization of Concrete Structures, Thin Coating Formation and Its Reduction/Betoninių konstrukcijų stalaktitizacija, apnašų susidarymas ir jų mažinimas | Structurae
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Stalactitization of Concrete Structures, Thin Coating Formation and Its Reduction/Betoninių konstrukcijų stalaktitizacija, apnašų susidarymas ir jų mažinimas

Author(s):

Medium: journal article
Language(s): Latvian
Published in: Journal of Civil Engineering and Management, , n. 3, v. 5
Page(s): 217-221
DOI: 10.3846/13921525.1999.10531465
Abstract:

Concrete and reinforced concrete construction of buildings and bridges, concrete slabs for laying streets, concrete tiles for laying pavements and squares are often covered with thin coating reminding of stalactites or white-grey flows. This phenomenon can be called stalactitization of concrete. It does not just worsen the decorative properties of concrete and reinforced concrete, but also weakens the mechanical strength of these materials. We discuss the reasons of stalactitization of concrete and reinforced concrete constructions and articles and recommend means to weaken this process. The processes of concrete structure stalactitization and formation of thin coating can be delayed in the following ways: Using a filler in production, which has calcite and limestone as little as possible, and controlling their amount by methods of chemical analysis. For CaO (0,5%), present in Portland cement, and for forming Ca(OH)2 in concrete neutralization substances containing SiO₂ and SiO₂ nH2O can be used but, to prevent alkaline corrosion of concrete, they can be applied only when Portland cement contains very little Na2O and K2O. If there is a possibility, do not use passivated Portland cement containing FeSO4 and A1(SO4)3. Avoid an excess of water when making concrete mixtures. Coloured or other concrete articles should be stored under a roof or at least be covered.

Copyright: © 1999 The Author(s). Published by VGTU Press.
License:

This creative work has been published under the Creative Commons Attribution 4.0 International (CC-BY 4.0) license which allows copying, and redistribution as well as adaptation of the original work provided appropriate credit is given to the original author and the conditions of the license are met.

  • About this
    data sheet
  • Reference-ID
    10363781
  • Published on:
    12/08/2019
  • Last updated on:
    02/06/2021