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Field performance of structural concrete slabs containing an hydrophobic admixture

From National Research Council Canada

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Affiliation
  1. National Research Council of Canada. NRC Institute for Research in Construction
FormatText, Article
Conference12th International Congress on the Chemistry of Cement: 08 July 2007, Montréal, QC.
SubjectConcrete
Abstract
As part of a major rehabilitation project on a multi-story concrete parking structure, a portion of the floor was rebuilt using a concrete containing a hydrophobic admixture, with the aim to delay corrosion of the embedded steel reinforcement. Two sections of an elevated slab and two interior ramps, rebuilt with this concrete, were instrumented for remote monitoring. Two other sections of the elevated slab, rebuilt with normal concrete, were also instrumented and used as references. The field performance of these sections has been monitored for two years since reconstruction in November 2004. In all test sections, the measurements and calculations show that the concrete tensile stresses due to restrained drying shrinkage reached the tensile strengths at early ages, regardless of the type of concrete in place. A visual inspection confirmed the presence of deep cracks in all monitored concrete slabs and ramps. This cracking is more problematic for the floor areas treated with the hydrophobic admixture, where no waterproofing membrane was applied.
Publication date
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  • 12th International Congress on the Chemistry of Cement [Proceedings] (8 July 2007): 1–12.
LanguageEnglish
Peer reviewedYes
NRC numberNRCC 49448
NRC-IRC-18451
NPARC number20378113
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Record identifierc43ae5ad-58e9-469f-b667-4d1b43dc20fa
Record created2012-07-24
Record modified2020-05-10
Date modified: