Mechanical Characterization of Steel-Reinforced Grout for Strengthening of Existing Masonry and Concrete Structures
Publication: Journal of Materials in Civil Engineering
Volume 31, Issue 5
Abstract
Steel-reinforced grout (SRG) materials are thin laminates made of continuous fabrics of high-strength steel cords embedded within a cementitious matrix. This paper investigates the mechanical characterization of four SRG systems used to strengthen masonry and concrete structures. Characterization tests were conducted in accordance with current standards. The SRG systems investigated in this study were composed of two types of steel textiles of different mass density, combined with two different types of mortar (a cement-based and a hydraulic lime-based mortar). A total of 95 SRG specimens were manufactured to carry out tensile (80 specimens) and interlaminar shear (15 specimens) tests. In addition, 70 pull-off bond tests were executed on several substrates (clay brick, concrete masonry, and cementitious masonry units). Moreover, compression tests on 40 mortar cubes were conducted to determine the strength of the matrices at 3, 7, 14, and 28 days of curing. The test results are presented and discussed clearly identifying the mechanical parameters of SRG composites.
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Acknowledgments
The authors gratefully acknowledge the financial support of the University Transportation Center “Research on Concrete; Applications for Sustainable Transportation (RE-CAST)” under Grant US DOT DTRT13-G-UTC45 and the National Science Foundation Industry/University Center for Integration of Composites into Infrastructure (CICI) under Grant NSF IIP-1439543.
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Published In
Journal of Materials in Civil Engineering
Volume 31 • Issue 5 • May 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: May 18, 2018
Accepted: Oct 12, 2018
Published online: Feb 27, 2019
Published in print: May 1, 2019
Discussion open until: Jul 27, 2019
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