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Bond behaviour and durability of concrete reinforced with alkali-resistant glassfibres
The application of glass fibres as textile reinforcement in concrete demands a sufficient high alkali resistance. This is achieved by addition of zircon dioxide. Single fibres (filaments) have diameters from 10 to 20 micrometers. For the purpose of textile reinforcement in concrete large area textile textures are produced using fibre/filament rovings. The matrices of concrete must conform to the specifics of the alkali resistant textile texture. The mixture is fine-grained and comprises a lot of cement. Like any other reinforcement in concrete the knowledge of bonding mechanisms is necessary for textile reinforced concrete too, particularly with regard to the crack-bridging behaviour due to external forces. Because the cross section of the roving is inhomogeneous the description of the bonding mechanisms is polymorphic. The first part of the report describes a model of bonding behaviour in local areas during crack opening. The second part specifies results of durability tests by a fast motion method. It is concluded that the post-crack behaviour of glass fibre reinforced specimens is determined by type of glass and kind of concrete mixture. The post-crack behaviour is not influenced by time. The post-crack behaviour decreases clearly due to decomposition of polymeric filament sizing and 'thick' shells of hydration products wrapping the filament. Climatic exposition to 40 deg C and 99 % humidity is a realistic fast test method for predicting the durability of textile reinforced concrete.
Bond behaviour and durability of concrete reinforced with alkali-resistant glassfibres
The application of glass fibres as textile reinforcement in concrete demands a sufficient high alkali resistance. This is achieved by addition of zircon dioxide. Single fibres (filaments) have diameters from 10 to 20 micrometers. For the purpose of textile reinforcement in concrete large area textile textures are produced using fibre/filament rovings. The matrices of concrete must conform to the specifics of the alkali resistant textile texture. The mixture is fine-grained and comprises a lot of cement. Like any other reinforcement in concrete the knowledge of bonding mechanisms is necessary for textile reinforced concrete too, particularly with regard to the crack-bridging behaviour due to external forces. Because the cross section of the roving is inhomogeneous the description of the bonding mechanisms is polymorphic. The first part of the report describes a model of bonding behaviour in local areas during crack opening. The second part specifies results of durability tests by a fast motion method. It is concluded that the post-crack behaviour of glass fibre reinforced specimens is determined by type of glass and kind of concrete mixture. The post-crack behaviour is not influenced by time. The post-crack behaviour decreases clearly due to decomposition of polymeric filament sizing and 'thick' shells of hydration products wrapping the filament. Climatic exposition to 40 deg C and 99 % humidity is a realistic fast test method for predicting the durability of textile reinforced concrete.
Bond behaviour and durability of concrete reinforced with alkali-resistant glassfibres
Bindeverhalten und Beständigkeit von mit alkaliresistenten Glasfasern verstärktem Beton
Schorn, H. (author) / Hempel, R. (author) / Brückner, A. (author) / Butler, M. (author) / Offermann, P. (author) / Abdkader, A. (author)
2003
11 Seiten, 22 Bilder, 1 Tabelle, 6 Quellen
Conference paper
Storage medium
English
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