Binding of externally supplied chlorides in micro silica concrete under field exposure conditions

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DOIResolve DOI: http://doi.org/10.1016/j.cemconcomp.2011.08.002
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TypeArticle
Journal titleCement and Concrete Composites
ISSN0958-9465
Volume33
Issue10
Pages10711079; # of pages: 9
SubjectChloride binding; Chloride binding capacity; Chloride concentrations; Chloride ions; Chloride penetration; Concrete samples; External chloride; External sources; Field exposure; General equations; Internal source; Long term exposure; Persian Gulf; Persian Gulf region; Service life prediction; Time to corrosion initiation; W/c ratio; Work Focus; Cements; Reinforced concrete; Seawater; Silica fume; Chlorine compounds
AbstractChloride binding has remarkable influence on the chloride penetration and hence, on the time to corrosion initiation in reinforced concrete structures. Previous studies have mainly looked at the chloride binding from internal sources in laboratory, which is not representative of practical situations. The current work focuses on the chloride binding characteristics of concrete samples exposed to an external source of chlorides from the sea water at Persian Gulf region. Some of the important parameters including w/c ratio, silica fume replacement and effect of chloride concentration on chloride binding were investigated in order to provide insight into the distribution of free and bound chloride ions after a long-term exposure. The results of the current study suggest that the chloride binding capacity increases with increasing the w/c ratio and chloride concentration but decreases by using silica fume. A general equation was also developed correlating the total and bound chloride in order to obtain more accurate service life prediction. © 2011 Elsevier Ltd. All rights reserved.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Research in Construction (IRC-IRC)
Peer reviewedYes
NPARC number21271239
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Record identifiercea5138a-8c99-4291-86c1-570b72871d80
Record created2014-03-24
Record modified2016-05-09
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