{"id":15495,"date":"2024-09-04T09:37:43","date_gmt":"2024-09-04T09:37:43","guid":{"rendered":"https:\/\/ruregold.mediaengine.it\/it\/micro-btons-fibrs-frc\/"},"modified":"2024-09-04T09:37:48","modified_gmt":"2024-09-04T09:37:48","slug":"micro-btons-fibrs-frc","status":"publish","type":"post","link":"https:\/\/ruregold.mediaengine.it\/fr\/micro-btons-fibrs-frc\/","title":{"rendered":"Micro-bétons fibrés FRC"},"content":{"rendered":"\t\t
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Le béton fibré<\/strong><\/span><\/a> (Fiber Reinforced Concrete-FRC) est un matériau composite<\/strong> caractérisé par une matrice à base de ciment<\/strong> et par des fibres<\/strong> discontinues, dont l’utilisation a été couronnée de succès<\/strong> dans de nombreuses applications structurelles<\/strong>, du bâtiment<\/strong> aux infrastructures<\/strong>, grâce aux innombrables propriétés conférées au mélange de ciment par l’ajout de fibres<\/strong>.<\/h3>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t
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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tTéléchargez la brochure complète<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Classification des FRC<\/strong><\/h3>\n<\/div>\n<\/div>\n
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Les bétons<\/a> fibrés<\/a><\/span> sont regroupés dans les mêmes classes de résistance à la compression des bétons traditionnels<\/strong>. Le béton traditionnel peut être schématiquement classé comme suit :<\/h5>\n
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\u2022 Performances normales <\/strong>jusqu’à des résistances ne dépassant pas C45\/55.
\u2022 À hautes performances <\/strong>avec des performances allant jusqu’à C70\/85.
\u2022 À haute résistance <\/strong>avec des résistances supérieures à C70\/85 jusqu’à C90\/105.
\u2022 Pour les classes de résistance supérieures à C90\/105<\/strong>, les performances (UHPC) n’ont pas encore été prises en compte dans le cadre règlementaire actuel.<\/h5>\n
Si les performances de la matrice à base de ciment sont associées à la fibre dans une quantité \u2265 0,3% en volume, le béton peut être classé comme suit :<\/h5>\n
FRC<\/strong> (Fiber Reinforced Concrete).
\u2022 HPFRC<\/strong> (High Performance Fiber Reinforced Concrete).
\u2022 UHPFRC<\/strong> (Ultra High – Performance Fiber Reinforced Concrete).<\/h5>\n
Le produit Micro<\/span> Gol<\/span>d<\/span> Steel<\/span><\/em><\/strong><\/a>, classé comme HPFRC : hautes performances et béton fibré, est inclus dans cette classification.<\/strong><\/h5>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Domaines d’application<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Bâtiment :<\/strong><\/span><\/h5>\n
\u2022 réparation structurelle à faible épaisseur des planchers en acier et bois<\/strong><\/span>
\u2022 renfort statique à faible épaisseur des planchers en béton<\/strong><\/span>
\u2022 renforcement structurel de poteaux avec chemisage<\/strong><\/span><\/h5>\n
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Dans la réparation structurelle des planchers en acier et bois<\/strong>, la pose du micro-béton HPFRC<\/strong>, appliqué à l’extrados (coté supérieur) du plancher<\/strong> à travers un système de connexion mécanique approprié, offre de nombreux avantages :<\/span>
\u2022 augmente<\/strong> la capacité portante du plancher<\/span>
\u2022 permet l’application en faible épaisseur<\/strong><\/span>
\u2022 assure des résistances mécaniques élevées à<\/strong> la compression
\net à la flexion<\/span><\/h5>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Dans le renfort statique en faible épaisseur des planchers en béton, le micro-béton HPFRC<\/strong> peut être appliqué en faible épaisseur <\/strong>et à l’extrados (coté supérieur) du plancher, même sans la pose de systèmes de connexion et d’armature diffusée<\/strong>. Il augmente la rigidité de l’étage intermédiaire des planchers en assurant de hautes performances<\/strong>, la rapidité<\/strong> et la facilité de pose<\/strong><\/span><\/h5>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Le renfort statique en faible épaisseur<\/strong> des planchers en béton, selon les exigences, peut être complété par le renforcement structurel à l’intrados (coté inférieur) avec le systèm<\/strong><\/a><\/span>e<\/strong><\/a><\/span> FRCM<\/strong><\/a><\/span>, augmentant ainsi la capacité de résistance à la flexion des poutres<\/strong> en béton armé.<\/span><\/h5>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Dans l’intervention de chemisage<\/strong>, l’utilisation de bétons à hautes performances et fibrés permet de réduire les épaisseurs<\/strong> de la chemise avec laquelle le poteau de départ est renforcé, ce qui entraîne une réduction efficace des armatures supplémentaires<\/strong>, avec des performances nettement plus élevées de l’élément renforcé. L’ajout de fibres modifie les propriétés mécaniques du béton, puisque le comportement à la traction du béton est nettement amélioré et, en particulier, l’ouverture des fissurations est contrecarrée.<\/strong><\/span><\/h5>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Infrastructures :<\/strong><\/h5>\n
\u2022 réparation structurelle moyennant l’épaississement des piles de pont<\/strong>
\u2022 renfort structurel moyennant la réparation extrados (coté supérieur) de la dalle<\/strong><\/h5>\n
L’utilisation du micro-béton pour l’épaississement des piles réduit non seulement l’ajout d’aciers, mais assure aussi la diminution des fissurations lors du retrait plastique du conglomérat, un meilleur comportement aux états limites d’exploitation ainsi que des résistances mécaniques élevées. <\/h5>\n
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La haute ténacité<\/strong> conférée au conglomérat par la présence de fibres métalliques, l’excellente adhérence au béton existant<\/strong> et aux barres d’armature traitées éventuellement avec barbotine de passivation du ferraillage appropriée, ainsi que la résistance aux cycles de gel et de dégel<\/strong>, font du micro-béton la solution idéale pour la réparation extrados (coté supérieur) de la dalle<\/strong> pour le renfort structurel<\/strong> des infrastructures.<\/strong><\/h5>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Micro Gold Steel<\/a><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Micro Gold Steel<\/span><\/a><\/strong> est un mortier en sac prêt à gâcher fibré<\/strong> avec des fibres métalliques<\/strong>, conçu pour l’amélioration sismique<\/strong> et le renforcement des structures en béton armé<\/strong>, même sans l’utilisation de composants métalliques supplémentaires.<\/h5>\n
Unités de 103,5 kg environ composée de :
\u2022 Partie A n\u00b0 4 sacs de prêt à gâcher sec de 25 kg\/pièce
\u2022 Partie B n\u00b0 1 boîte de fibres d’acier de 3,5 kg.<\/h5>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Résistant au feu<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Résistant aux\ncycles de\ngel\/dégel<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Facile\nà appliquer<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Comportement de durcissement par déformation<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tTéléchargez le PDF de la brochure dédiée aux Renforcements structurels FRC et micro-bétons fibrés<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Voulez-vous en savoir plus ? <\/strong><\/span><\/h5>\n
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