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Bridge Decks: Mitigation of Shrinkage Cracking and Increased Durability

Project Details
STATE

IL

SOURCE

TRID

START DATE

07/01/13

END DATE

06/01/16

RESEARCHERS

Ardavan Ardeshirilajimi, Di Wu, Piyush Chaunsali, Paramita Mondal, Ying Tung Chen, Mohammad Mahfuzur Rahman, Ahmed Ibrahim, Will Lindquist, Riyadh Hindi

SPONSORS

IDOT/ICT

KEYWORDS

Bridge decks, Bridges, Cracking, Deck model, Durability, Expansive concrete, Finite element model, Fly ash, Lightweight aggregates, Mitigation, Parametric analysis, Shrinkage, Silica fume, SRA

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Project description

The application of pre-soaked lightweight aggregates (LWA) as an internal curing agent in concrete to reduce the cracking due to drying shrinkage is thoroughly studied in this report. It is determined that although LWA can significantly reduce autogenous shrinkage, its effect on drying shrinkage is minimal and in some cases it can even increase the drying shrinkage. Moreover, the combined effects of LWA and expansive cement (Type K) and LWA and shrinkage-reducing admixtures (SRAs) on drying shrinkage is also studied. It is shown that addition of Type K cement or SRA to mixtures containing LWA can significantly reduce drying shrinkage and make the mixture more volumetrically stable.
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