Bio-Inspired Impregnations of Carbon Rovings for Tailored Bond Behavior in Carbon Fiber Reinforced Concrete

Nature provides various templates for integrating organic and inorganic materials to create high-performance composites. Biological structures such as nacre and the structural elements of the glass sponge are built up in layers, leading to remarkable fracture toughness. In this work, the brick-and-m...

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Bibliographic Details
Published in:	Buildings (Basel) Vol. 13; no. 12; p. 3102
Main Authors:	Utech, Toni, Neef, Tobias, Mechtcherine, Viktor, Scheffler, Christina
Format:	Journal Article
Language:	English
Published:	Basel MDPI AG 01-12-2023
Subjects:	Atoms & subatomic particles bio-inspired interphases Calcium carbonate Carbon carbon fiber reinforced concrete Carbon fiber reinforced concretes Carbon fiber reinforcement Carbon fibers Chemical bonds Chemical reactions Concrete Curing Dispersions Fracture toughness Inorganic materials Light microscopy Mechanical properties Optical microscopy Polymers Reinforced concrete Structural members Tensile strength Textiles Thermogravimetric analysis yarn pull-out test Germany
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Summary:	Nature provides various templates for integrating organic and inorganic materials to create high-performance composites. Biological structures such as nacre and the structural elements of the glass sponge are built up in layers, leading to remarkable fracture toughness. In this work, the brick-and-mortar and layer-by-layer structures found in these biological examples have been abstracted and implemented by using an aqueous polymer dispersion in combination with nanoclay particles and sodium water glass. These dispersions were used as impregnation of carbon rovings in order to form bio-inspired contact zones towards the concrete matrix. The bonding behavior was investigated using the Yarn Pull-Out (YPO) test, and a beneficial behavior of the layered polymer–nanoclay dispersions was observed. Thermogravimetric analysis (TGA) was used to determine the organic impregnation content of the roving. Further, light microscopy of the roving cross-sections prior to YPO and visual analyses of the fractured contact zone of split concrete specimens provided information on the quality of the impregnation and the interaction with the concrete matrix.
ISSN:	2075-5309 2075-5309
DOI:	10.3390/buildings13123102