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Effects of fibre type and matrix structure on the mechanical performance of self-compacting micro-concrete composites / Burak Felekoğlu in Cement and concrete research, Vol. 39 N° 11 (Novembre 2009) 

Public ISBD [article]  in Cement and concrete research > Vol. 39 N° 11 (Novembre 2009) . - pp. 1023–1032 Titre : Effects of fibre type and matrix structure on the mechanical performance of self-compacting micro-concrete composites Type de document : texte imprimé Auteurs : Burak Felekoğlu, Auteur ; Kamile Tosun, Auteur ; Bülent Baradan, Auteur Année de publication : 2010 Article en page(s) : pp. 1023–1032 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Micro-concrete;  Fiber  Reinforcement  ;  Fracture  Toughness  ;Fly  Ash  ;  SEM Index. décimale : 691 Matériaux de construction. Pièces et parties composantes Résumé : The compatibility of matrix and fibre properties is one of the key parameters in the successful design of fibre reinforced cementitious composites. In order to achieve the desired performance, the properties of each constituent of composite should be properly configured. The aim of this study was to investigate the performance of two polymer based micro-fibres (polypropylene and polyvinyl alcohol) in different matrices (high strength and comparatively low strength with fly ash incorporation) which were designed to contain considerably high amounts of fibres (1% by volume) while maintaining their self-compactability. The fresh state thixotropic behaviour of fibre reinforced matrices was minimised by proper adjustment of water/cementitious material ratio and admixture dosage. The mechanical properties (first crack strength and displacement, flexural strength and relative toughness) of prismatic composite samples were compared by three point flexural loading test. The typical behaviours of selected composites and collapse mechanisms of PP and PVA fibres in these matrices were characterised by microstructural studies. It was concluded that, a high strength matrix with a high strength fibre give the best performance from the view point of flexural strength and toughness performance. However, incorporation of fly ash did not cause a significant reduction in composite performance possibly due to its enhancing effect on matrix–fibre interface adhesion. The possibilities and suggestions to further improve the performance of the composites were also discussed. DEWEY : 620.13 ISSN : 0009-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609001677 [article] Effects of fibre type and matrix structure on the mechanical performance of self-compacting micro-concrete composites [texte imprimé] / Burak Felekoğlu, Auteur ; Kamile Tosun, Auteur ; Bülent Baradan, Auteur . - 2010 . - pp. 1023–1032. Génie Civil Langues : Anglais (eng) in Cement and concrete research > Vol. 39 N° 11 (Novembre 2009) . - pp. 1023–1032 Mots-clés : Micro-concrete;  Fiber  Reinforcement  ;  Fracture  Toughness  ;Fly  Ash  ;  SEM Index. décimale : 691 Matériaux de construction. Pièces et parties composantes Résumé : The compatibility of matrix and fibre properties is one of the key parameters in the successful design of fibre reinforced cementitious composites. In order to achieve the desired performance, the properties of each constituent of composite should be properly configured. The aim of this study was to investigate the performance of two polymer based micro-fibres (polypropylene and polyvinyl alcohol) in different matrices (high strength and comparatively low strength with fly ash incorporation) which were designed to contain considerably high amounts of fibres (1% by volume) while maintaining their self-compactability. The fresh state thixotropic behaviour of fibre reinforced matrices was minimised by proper adjustment of water/cementitious material ratio and admixture dosage. The mechanical properties (first crack strength and displacement, flexural strength and relative toughness) of prismatic composite samples were compared by three point flexural loading test. The typical behaviours of selected composites and collapse mechanisms of PP and PVA fibres in these matrices were characterised by microstructural studies. It was concluded that, a high strength matrix with a high strength fibre give the best performance from the view point of flexural strength and toughness performance. However, incorporation of fly ash did not cause a significant reduction in composite performance possibly due to its enhancing effect on matrix–fibre interface adhesion. The possibilities and suggestions to further improve the performance of the composites were also discussed. DEWEY : 620.13 ISSN : 0009-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609001677