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Korrosions- und Verbundverhalten verzinkter Betonstähle in Betonen mit chromatreduzierten Zementen

Author(s):



Medium: journal article
Language(s): German
Published in: Beton- und Stahlbetonbau, , n. 9, v. 106
Page(s): 629-639
DOI: 10.1002/best.201100038
Abstract:

Corrosion and bond behaviour of galvanized reinforcing steels in concrete with chromate-reduced cements

The reduction of the chromate contents in cements affects the electrochemical reactions of galvanized reinforcing steels in fresh concrete. By means of electrochemical measurements and bar pull-out tests the effect of chromates on the formation of protective coatings at the zinc and the bond behaviour have been investigated using chromate-containing and chromate-reduced cements.
The results have shown that the bond zone was affected as a result of chromate reduction for cement types CEM I and CEM II. The disturbance to the bond zone should be considered as long-term in relation to the pore structure which is formed. The effects on the bond are largely compensated for as the concrete ages. The results of the related bond strength with displacement paths of 0.1 and 0.5 mm, respectively, are still within the range of expected figures for non-galvanized reinforcing steel despite the structural disturbance. Under practical aspects it is not necessary that the existing structural disturbance with respect to bond strength is taken into consideration.

Keywords:
composite corrosion cement
Available from: Refer to publisher
Structurae cannot make the full text of this publication available at this time. The full text can be accessed through the publisher via the DOI: 10.1002/best.201100038.
  • About this
    data sheet
  • Reference-ID
    10065918
  • Published on:
    06/10/2011
  • Last updated on:
    13/08/2014
 
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