United States Department of Transportation
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Strengthening and Repair of Structural Concrete with a Fabric-Reinforced-Cementitious-Matrix (FRCM) [Volume II]: Field Studies
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2020-01-01
[PDF-9.23 MB]
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Alternative Title:Volume II: Strengthening and Repair of Structural Concrete with a Fabric-Reinforced-Cementitious-Matrix (FRCM): Field Studies
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Edition:Final Report, Period: 8/1/2014 – 12/31/19
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Abstract:With infrastructure continuing to age, technologies are being developed to strengthen structures as a more sustainable option than replacement. The use of fiber reinforced cementitious matrix (FRCM) strengthening systems is a promising new technology for adding flexural and shear capacity to existing reinforced concrete members. While cement based systems with carbon, PBO, and steel have all been implemented in a lab setting, there is not research data available for installation in the field. FRCM composites have advantages over more widely used fiber reinforced polymer (FRP) composites such as heat resistance and compatibility with concrete substrate. FRP systems have previously been field tested, giving confidence for the growth of FRCM use. This study aimed to validate the use of cement-based systems for field implementation. Missouri Bridge P-0058, a structurally deficient bridge in southern Missouri, was recently selected and six of its twelve girders were identified for strengthening using four different composite systems, three of which are cement-based. A parametric study was conducted to help choose the final design that will give the best information in the future. A pre-strengthening load test was conducted to get a baseline of the bridge’s stiffness, so that future tests can capture the change due to the strengthening as well as potential loss of stiffness over time. Future work desires for the bridge girders to be brought to the campus of Missouri University of Science and Technology when the bridge is decommissioned. On campus, destructive testing will give valuable information about the field strengthened and field conditioned beams.
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