Development of Thermoplastic Composite Reinforced Ultra-High-Performance Concrete Panels for Impact Resistance

In order to improve flexural and impact performance, thin panels of steel fiber-reinforced ultra-high performance concrete (UHPC) were further reinforced with external layers of continuous fiber-reinforced thermoplastic (CFRTP) composites. CFRTP sheets were bonded to 305 × 305 × 12 mm UHPC panels us...

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Bibliographic Details
Published in:Materials 2021-05, Vol.14 (10), p.2490
Main Authors: Smith-Gillis, Reagan, Lopez-Anido, Roberto, Rushing, Todd S, Landis, Eric N
Format: Article
Language:English
Subjects:
Aluminum
Cellulose
Concrete mixing
Continuous fiber composites
Curing
Feasibility studies
Fiber composites
Fiber reinforced concretes
Fiber reinforced polymers
Glass-epoxy composites
Impact resistance
Impact strength
Panels
Peak load
Polyethylene terephthalate
Polymers
Polymethyl methacrylate
R&D
Reinforcing steels
Research & development
Resins
Silicones
Steel fibers
Thermoforming
Thermoplastic composites
Ultra high performance concrete
Velocity
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Summary:In order to improve flexural and impact performance, thin panels of steel fiber-reinforced ultra-high performance concrete (UHPC) were further reinforced with external layers of continuous fiber-reinforced thermoplastic (CFRTP) composites. CFRTP sheets were bonded to 305 × 305 × 12 mm UHPC panels using two different techniques. First, unidirectional E-glass fiber-reinforced tapes of polyethylene terephthalate glycol-modified (PETG) were arranged in layers and fused to the UHPC panels through thermoforming. Second, E-glass fiber woven fabrics were placed on the panel faces and bonded by vacuum infusion with a methyl methacrylate (MAA) polymer. Specimens were cut into four 150 mm square panels for quasi-static and low-velocity impact testing in which loads were applied at the panel centers. Under quasi-static loading, both types of thermoplastic composite reinforcements led to a 150-180% increase in both peak load capacity and toughness. Impact performance was measured in terms of both residual deformation and change in specimen compliance, and CFRTP additions were reduced both by 80% to 95%, indicating an increase in damage resistance. While both reinforcement fabrication techniques provided added performance, the thermoforming method was preferable due to its simplicity and fewer specialized tool requirements.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma14102490