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A platform for research: civil engineering, architecture and urbanism
New commingling yarn structures for a textile reinforced concrete
Textile reinforced concrete is a new composite for the field of the civil engineering. The investigations of the properties of this innovative material as well as the development of new technologies for its production are the main goals of the collaborative research project SFB 532. Different tensile and pull-out-tests have scientifically proven, that the variation of the reinforcement yarn structure has a big influence on the mechanical properties of the concrete composite. In order to improve the compound between the concrete matrix and the reinforcement, a new commingling yarn structure was developed. The innovative hybrid yarn is composed of AR-Glass fibres and water soluble polyvinyl alcohol (PVA) filaments. After the embedding of the reinforcement structure in concrete, the PVA-filaments get dissolved due to the alkaline matrix. Thus hollow spaces are generated between the glass filaments. The concrete matrix flows into these cavities and penetrate the internal filaments of the reinforcement yarn. Better penetration is not the only benefit from the application of PVA-fibres. PVA improves the microstructure of the concrete matrix, by intervening in the nucleation and the crystallization of the mineral components of the concrete. The behaviour of the commingling yarns into a concrete matrix as well as the mechanical properties of the compound are currently being investigated.
New commingling yarn structures for a textile reinforced concrete
Textile reinforced concrete is a new composite for the field of the civil engineering. The investigations of the properties of this innovative material as well as the development of new technologies for its production are the main goals of the collaborative research project SFB 532. Different tensile and pull-out-tests have scientifically proven, that the variation of the reinforcement yarn structure has a big influence on the mechanical properties of the concrete composite. In order to improve the compound between the concrete matrix and the reinforcement, a new commingling yarn structure was developed. The innovative hybrid yarn is composed of AR-Glass fibres and water soluble polyvinyl alcohol (PVA) filaments. After the embedding of the reinforcement structure in concrete, the PVA-filaments get dissolved due to the alkaline matrix. Thus hollow spaces are generated between the glass filaments. The concrete matrix flows into these cavities and penetrate the internal filaments of the reinforcement yarn. Better penetration is not the only benefit from the application of PVA-fibres. PVA improves the microstructure of the concrete matrix, by intervening in the nucleation and the crystallization of the mineral components of the concrete. The behaviour of the commingling yarns into a concrete matrix as well as the mechanical properties of the compound are currently being investigated.
New commingling yarn structures for a textile reinforced concrete
Kravaev, Plamen (author) / Janetzko, Steffen (author) / Gries, Thomas (author)
2007
5 Seiten, 5 Bilder
Conference paper
Storage medium
English
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