Influence of Polyvinyl Alcohol, Steel, and Hybrid Fibers on Fresh and Rheological Properties of Self-Consolidating Concrete
Publication: Journal of Materials in Civil Engineering
Volume 24, Issue 9
Abstract
Fiber-reinforced self-consolidating concrete (FRSCC) has a tremendous potential to be used in construction industry because it combines the advantages of both self-consolidating concrete (SCC) and fiber-reinforced concrete (FRC). Nineteen concrete mixtures are developed by incorporating different dosages (up to 0.5% volume or of concrete) of polyvinyl alcohol (PVA) and metallic fibers and their combinations. The influences of fiber types, size, dosages, and fiber combinations (used in hybrid mixes) on fresh (slump flow, L-box passing ability, V-funnel flow time, and segregation index—a measure of workability) and rheological (viscosity and yield stress at various time intervals ranging from 10 to 70 min) properties are critically analyzed on the basis of experimental results. The workability/rheological properties of concrete mixtures are found to depend on types, dosages, geometry of fiber, and in cases of hybrid mixtures, interaction and synergic properties between different fiber types also play a critical role. The maximum dosage of PVA is limited to 0.125% compared with 0.3% of metallic fibers in developed FRSCC mixtures because of PVA’s higher workability reduction/viscosity increase capability. In addition, relationships among fresh/workability and rheological properties are also established.
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Acknowledgments
The authors acknowledge the financial support of the National Science and Engineering Research Council (NSERC) of Canada. The authors would also like to thank the technical staffs of the Ryerson University Civil Engineering Department for providing support and assistance during the experimental program.
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Information
Published In
Journal of Materials in Civil Engineering
Volume 24 • Issue 9 • September 2012
Pages: 1211 - 1220
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Sep 6, 2011
Accepted: Jan 26, 2012
Published online: Jan 28, 2012
Published in print: Sep 1, 2012
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