Improvement on SIFCON Performance by Fiber Orientation and High-Volume Mineral Admixtures
Publication: Journal of Materials in Civil Engineering
Volume 22, Issue 11
Abstract
The effects of steel fiber alignment and high-volume mineral admixture replacement [Class C fly ash (FA) and ground granulated blast furnace slag (GGBS)] on the mechanical properties of SIFCON (Slurry Infiltrated Fiber Concrete) have been investigated. Ordinary portland cement was replaced with 50% (by weight) FA or GGBS in SIFCON slurries, and two different steel fiber alignments (random and oriented in one direction) were used. Test results showed that FA and GGBS replacement positively affected mechanical properties (compressive and flexural strength and fracture energy) and fiber alignment is an important factor for superior performance. Binary combination of improved matrices (low water/binder ratio and mineral admixture replacement) and proper fiber orientation enhances mechanical performance, particularly flexural properties of SIFCON. Flexural strength and fracture energy of this composite are 138 MPa and 195,815 N/m, respectively. Scanning electron microscope investigations revealed tobermorite-like structures having different morphology such as foiled, fibrous, and honeycomb with low Ca/Si ratio after autoclaving. Mercury porosimeter tests showed the decreasing of total porosity and pore refinement with FA or GGBS.
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Acknowledgments
This study is a part of the project supported by the Scientific and Technological Research Council of Turkey (TÜBİTAK, Project No: UNSPECIFIED106M283). The writers gratefully acknowledge TÜBİTAK. In addition, the writers acknowledge Mr. Osman TEZEL from BASF, Mr. Okan TOĞRUL from Draco, Mr. Hakan ŞENVARDARLI from Karçimsa, and Mrs. Nagehan HALDENBİLEN from Modern Beton for their material support.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 22 • Issue 11 • November 2010
Pages: 1093 - 1101
Copyright
© 2010 ASCE.
History
Received: Oct 1, 2009
Accepted: Apr 29, 2010
Published online: May 6, 2010
Published in print: Nov 2010
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