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A platform for research: civil engineering, architecture and urbanism
Interface Evaluation of Carbon Textile Reinforced Composites
Cement production is responsible for high CO2 emissions. Focusing on environmental sustainability, there is nowadays a desire to make thinner concrete elements, thereby reducing the amount of cement used. Textile reinforced concrete (TRC) is a cementitious matrix composite reinforced with one or multiple layers of 2D or 3D fabrics that present elevated mechanical performance aligned with high load-bearing capacity. The textiles can be constituted by several types of fibres. Carbon fibres are an attractive option due to their superior mechanical and durability properties. However, they present a low bond with the cementitious matrix. The bond between the textile reinforcement and the matrix is the weakest region of the composite, therefore governing the element behaviour up to its failure. Polymeric coatings can be used to enhance the interaction between the carbon fabric and the cementitious matrix. Nevertheless, these materials present a decomposition temperature extremely lower than the one of the carbon fabrics, limiting their use in case of elevated temperature conditions. An alternative to improve the bond and, consequently, the composite mechanical performance is matrix modification and use of inorganic high-tech ceramics, such as geopolymers, as coatings. This paper aims to present a comparison of the interface behaviour of carbon textile reinforced composites embedded in distinct matrices. For this, pull-out tests will be performed in carbon yarns impregnated with SBR. A cementitious and a geopolymer matrix will be evaluated. Furthermore, the influence of an additional geopolymer coating will also be analyzed.
Interface Evaluation of Carbon Textile Reinforced Composites
Cement production is responsible for high CO2 emissions. Focusing on environmental sustainability, there is nowadays a desire to make thinner concrete elements, thereby reducing the amount of cement used. Textile reinforced concrete (TRC) is a cementitious matrix composite reinforced with one or multiple layers of 2D or 3D fabrics that present elevated mechanical performance aligned with high load-bearing capacity. The textiles can be constituted by several types of fibres. Carbon fibres are an attractive option due to their superior mechanical and durability properties. However, they present a low bond with the cementitious matrix. The bond between the textile reinforcement and the matrix is the weakest region of the composite, therefore governing the element behaviour up to its failure. Polymeric coatings can be used to enhance the interaction between the carbon fabric and the cementitious matrix. Nevertheless, these materials present a decomposition temperature extremely lower than the one of the carbon fabrics, limiting their use in case of elevated temperature conditions. An alternative to improve the bond and, consequently, the composite mechanical performance is matrix modification and use of inorganic high-tech ceramics, such as geopolymers, as coatings. This paper aims to present a comparison of the interface behaviour of carbon textile reinforced composites embedded in distinct matrices. For this, pull-out tests will be performed in carbon yarns impregnated with SBR. A cementitious and a geopolymer matrix will be evaluated. Furthermore, the influence of an additional geopolymer coating will also be analyzed.
Interface Evaluation of Carbon Textile Reinforced Composites
RILEM Bookseries
Valente, Isabel B. (editor) / Ventura Gouveia, António (editor) / Dias, Salvador S. (editor) / Silva, Rebecca M. C. (author) / Trindade, Ana C. C. (author) / Silva, Flávio A. (author)
RILEM Spring Convention and Conference ; 2020 ; Guimarães, Portugal
Proceedings of the 3rd RILEM Spring Convention and Conference (RSCC 2020) ; Chapter: 19 ; 205-215
RILEM Bookseries ; 33
2021-07-06
11 pages
Article/Chapter (Book)
Electronic Resource
English
Interface Evaluation of Carbon Textile Reinforced Composites
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