100-Year service-life bridge decks using low-shrinkage high-performance concrete

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Conference18e Colloque sur la progression de la recherche québécoise sur les ouvrages d'art: 10 May 2011, Quebec City, Quebec
Pages18; # of pages: 8
SubjectBridges; Concrete
AbstractHighway bridges and parking structures, subject to coupled effects of mechanical loads and corrosion, often show early signs of distress such as concrete cracking and rebar corrosion leading to reduced structural performance and shortened service life. One possible solution is to use low-shrinkage low-permeability high-performance concrete (HPC) for bridge decks exposed to de-icing salts and severe loading conditions. A new HPC has been formulated to achieve low shrinkage and low permeability, high early-strength, and 28-day compressive strength of up to 70 MPa. Its mechanical performance and durability have been tested both in the lab and field under severe test conditions, including restrained shrinkage, cycling loading, freezing and thawing cycles, and application of de-icing salts. Prediction models have been developed and calibrated to predict structural performance and service life of concrete bridge decks under severe exposure conditions. Prediction models indicate that bridge decks designed with low-shrinkage HPC can achieve service lives exceeding 100 years. Compared to normal concrete decks, short-to-medium span bridge decks using low-shrinkage HPC could be built at a comparable initial construction cost, but at less than 40% of the life-cycle cost over a 100-year period.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number54018
NPARC number20374956
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Record identifiera1bc83fc-2a1f-4060-82fd-5ae80ef61c35
Record created2012-07-23
Record modified2016-05-09
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