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Effect of cracking on transport of water and gases in textile reinforced concrete
Textile reinforced concrete (TRC) can be used efficiently in new construction as well as in the strengthening and repair of structural elements made of reinforced concrete or other traditional materials. The durability of TRC and its protective function in the case of strengthening and repair depends on the resistance of the material to the movement of fluids and gases. This paper presents an experimental study on the influence of characteristic multiple cracking in TRC on the transport of such substances into and through this novel material as well as on the effect of polymer coating of the textile on its tendency to absorb water. Water absorption as well as gas and water permeability tests were performed on both crack-free and cracked specimens. Very low gas permeability perpendicular to the textile layers was observed in crack-free specimens. In the case of cracked material, the transport values obtained correlated with the residual strains (deformations remaining after unloading) as well as with the cumulative crack length. Furthermore, capillary suction by multifilament yarns influenced water absorption of TRC significantly. Finally, the effect of self-healing of cracks on the transport properties of TRC was investigated.
Effect of cracking on transport of water and gases in textile reinforced concrete
Textile reinforced concrete (TRC) can be used efficiently in new construction as well as in the strengthening and repair of structural elements made of reinforced concrete or other traditional materials. The durability of TRC and its protective function in the case of strengthening and repair depends on the resistance of the material to the movement of fluids and gases. This paper presents an experimental study on the influence of characteristic multiple cracking in TRC on the transport of such substances into and through this novel material as well as on the effect of polymer coating of the textile on its tendency to absorb water. Water absorption as well as gas and water permeability tests were performed on both crack-free and cracked specimens. Very low gas permeability perpendicular to the textile layers was observed in crack-free specimens. In the case of cracked material, the transport values obtained correlated with the residual strains (deformations remaining after unloading) as well as with the cumulative crack length. Furthermore, capillary suction by multifilament yarns influenced water absorption of TRC significantly. Finally, the effect of self-healing of cracks on the transport properties of TRC was investigated.
Effect of cracking on transport of water and gases in textile reinforced concrete
Der Einfluss einer Rissbildung auf den Transport von Wasser und Gasen in textilverstärkten Betonen
Lieboldt, M. (author) / Barhum, R. (author) / Mechtcherine, V. (author)
2009
7 Seiten, 12 Bilder, 3 Tabellen, 4 Quellen
Conference paper
English
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