Thesis
Evaluation of concrete mix designs to mitigate early-age shrinkage cracking in bridge decks
Washington State University
Master of Science (MS), Washington State University
2009
Handle:
https://hdl.handle.net/2376/100590
Abstract
Early-age shrinkage cracking has been observed in many concrete bridge decks in Washington State and elsewhere around the U.S. The cracking increases the effects of freezethaw damage, spalling, and corrosion of steel reinforcement, thus resulting in premature deterioration and structural deficiency of the bridges. In this study, the main causes of the earlyage cracking in the decks are identified, and concrete mix designs as a strategy to prevent or minimize the shrinkage cracking are evaluated. Different sources (Eastern and Western Washington) and sizes of aggregates are considered, and the effects of paste content, cementitious materials (cement, fly ash, silica fume, slag), and shrinkage reducing admixture (SRA) are evaluated. A series of concrete shrinkage and mechanical property tests are performed. The outcomes of this study identify optimum concrete mix designs as appropriate mitigation strategies to reduce or eliminate early-age shrinkage cracking and thus help minimize shrinkage-associated cracking in the concrete bridge decks, potentially leading to a great deduction in bridge deck maintenance costs.
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Details
- Title
- Evaluation of concrete mix designs to mitigate early-age shrinkage cracking in bridge decks
- Creators
- Jianmin Zhuang
- Contributors
- Pizhong Qiao (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Civil and Environmental Engineering, Department of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; Pullman, Wash. :
- Identifiers
- 99900525013601842
- Language
- English
- Resource Type
- Thesis