Woven Carbon-Fiber-Reinforced Polymer Tubular Mesh Reinforcement of Hollow High-Performance Concrete Beams
This article presents woven carbon-fiber-reinforced polymer (CFRP) tubular mesh used as a reinforcement on the inner surface of hollow beams made of high-performance concrete (HPC). The tubular mesh was designed to serve as both the tensile and shear reinforcement of hollow beams intended for the co...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-07-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/15/14/3089 |
| _version_ | 1797587651256123392 |
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| author | Jakub Řepka Tomáš Vlach Jakub Hájek Richard Fürst Jan Pošta Petr Hájek |
| author_facet | Jakub Řepka Tomáš Vlach Jakub Hájek Richard Fürst Jan Pošta Petr Hájek |
| author_sort | Jakub Řepka |
| collection | DOAJ |
| description | This article presents woven carbon-fiber-reinforced polymer (CFRP) tubular mesh used as a reinforcement on the inner surface of hollow beams made of high-performance concrete (HPC). The tubular mesh was designed to serve as both the tensile and shear reinforcement of hollow beams intended for the construction of small self-supporting structures that could be assembled without mechanization. The reinforcement was prepared with a tri-axial weaving machine from carbon filament yarn and was homogenized using epoxy resin. The interaction of the composite reinforcement with the cementitious matrix was investigated, and the surface of the reinforcement was modified using silica sand and polyvinyl alcohol (PVA) fibers to improve cohesion. The sand coating enhanced bond strength, resulting in the significantly higher flexural strength of the hollow beam of 128%. The PVA fibers had a lower positive effect of 64% on the flexural strength but improved the ductility of the beam. Individual beams were connected by gluing steel parts directly inside the hollow core of the HPC beam. This procedure provides good interaction between the CFRP reinforcement and the glued steel insert and allows for the fast and simple assembly of structures. The weaving of additional layers of the CFRP reinforcement around HPC beams was also explored. A small structure made of the hollow HPC beams with inner composite reinforcement was constructed to demonstrate the possibilities of the presented technology. |
| first_indexed | 2024-03-11T00:41:55Z |
| format | Article |
| id | doaj.art-4c77dbb7eb484a30ba60305301aa7663 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-11T00:41:55Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-4c77dbb7eb484a30ba60305301aa76632023-11-18T21:03:09ZengMDPI AGPolymers2073-43602023-07-011514308910.3390/polym15143089Woven Carbon-Fiber-Reinforced Polymer Tubular Mesh Reinforcement of Hollow High-Performance Concrete BeamsJakub Řepka0Tomáš Vlach1Jakub Hájek2Richard Fürst3Jan Pošta4Petr Hájek5University Centre for Energy Efficient Buildings, Czech Technical University in Prague, 27343 Buštěhrad, Czech RepublicUniversity Centre for Energy Efficient Buildings, Czech Technical University in Prague, 27343 Buštěhrad, Czech RepublicUniversity Centre for Energy Efficient Buildings, Czech Technical University in Prague, 27343 Buštěhrad, Czech RepublicFederal Institute for Materials Research and Testing (BAM), Division 7.3-Fire Engineering, Unter den Eichen 87, 12205 Berlin, GermanyUniversity Centre for Energy Efficient Buildings, Czech Technical University in Prague, 27343 Buštěhrad, Czech RepublicUniversity Centre for Energy Efficient Buildings, Czech Technical University in Prague, 27343 Buštěhrad, Czech RepublicThis article presents woven carbon-fiber-reinforced polymer (CFRP) tubular mesh used as a reinforcement on the inner surface of hollow beams made of high-performance concrete (HPC). The tubular mesh was designed to serve as both the tensile and shear reinforcement of hollow beams intended for the construction of small self-supporting structures that could be assembled without mechanization. The reinforcement was prepared with a tri-axial weaving machine from carbon filament yarn and was homogenized using epoxy resin. The interaction of the composite reinforcement with the cementitious matrix was investigated, and the surface of the reinforcement was modified using silica sand and polyvinyl alcohol (PVA) fibers to improve cohesion. The sand coating enhanced bond strength, resulting in the significantly higher flexural strength of the hollow beam of 128%. The PVA fibers had a lower positive effect of 64% on the flexural strength but improved the ductility of the beam. Individual beams were connected by gluing steel parts directly inside the hollow core of the HPC beam. This procedure provides good interaction between the CFRP reinforcement and the glued steel insert and allows for the fast and simple assembly of structures. The weaving of additional layers of the CFRP reinforcement around HPC beams was also explored. A small structure made of the hollow HPC beams with inner composite reinforcement was constructed to demonstrate the possibilities of the presented technology.https://www.mdpi.com/2073-4360/15/14/3089carbon-fiber-reinforced polymerwoven composite reinforcementhollow concrete beamshigh-performance concretebond strengthsand-coated |
| spellingShingle | Jakub Řepka Tomáš Vlach Jakub Hájek Richard Fürst Jan Pošta Petr Hájek Woven Carbon-Fiber-Reinforced Polymer Tubular Mesh Reinforcement of Hollow High-Performance Concrete Beams Polymers carbon-fiber-reinforced polymer woven composite reinforcement hollow concrete beams high-performance concrete bond strength sand-coated |
| title | Woven Carbon-Fiber-Reinforced Polymer Tubular Mesh Reinforcement of Hollow High-Performance Concrete Beams |
| title_full | Woven Carbon-Fiber-Reinforced Polymer Tubular Mesh Reinforcement of Hollow High-Performance Concrete Beams |
| title_fullStr | Woven Carbon-Fiber-Reinforced Polymer Tubular Mesh Reinforcement of Hollow High-Performance Concrete Beams |
| title_full_unstemmed | Woven Carbon-Fiber-Reinforced Polymer Tubular Mesh Reinforcement of Hollow High-Performance Concrete Beams |
| title_short | Woven Carbon-Fiber-Reinforced Polymer Tubular Mesh Reinforcement of Hollow High-Performance Concrete Beams |
| title_sort | woven carbon fiber reinforced polymer tubular mesh reinforcement of hollow high performance concrete beams |
| topic | carbon-fiber-reinforced polymer woven composite reinforcement hollow concrete beams high-performance concrete bond strength sand-coated |
| url | https://www.mdpi.com/2073-4360/15/14/3089 |
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