{"id":5534,"date":"2023-10-27T18:00:05","date_gmt":"2023-10-27T16:00:05","guid":{"rendered":"https:\/\/www.labexpin.com\/portfolio-items\/essai-de-pull-out\/"},"modified":"2025-05-11T12:43:24","modified_gmt":"2025-05-11T10:43:24","slug":"essai-de-pull-out","status":"publish","type":"avada_portfolio","link":"https:\/\/www.labexpin.com\/fr\/portfolio-items\/essai-de-pull-out\/","title":{"rendered":"Essai de pull-out"},"content":{"rendered":"

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Essai de pull-out<\/h1><\/div>

Les essais de pull-out sont une technique d’enqu\u00eate permettant d’\u00e9valuer la r\u00e9sistance moyenne du b\u00e9ton par l’extraction d’une barre ou cheville d’expansion pr\u00e9-ins\u00e9r\u00e9e ou post-ins\u00e9r\u00e9e dans le b\u00e9ton dans des trous sp\u00e9cifiques. La cheville ou la barre est ins\u00e9r\u00e9e par battage, ce qui permet \u00e0 la partie radiale interne de se dilater pour une parfaite adh\u00e9rence aux murs.
\nOn applique ensuite un v\u00e9rin hydraulique qui repose sur une surface circulaire ; la rupture d’un c\u00f4ne de b\u00e9ton est d\u00e9termin\u00e9e par le tir de la cheville. La force qui provoque la rupture du b\u00e9ton est ensuite associ\u00e9e, \u00e0 l’aide de courbes d’\u00e9talonnage exp\u00e9rimentales, \u00e0 la r\u00e9sistance caract\u00e9ristique du b\u00e9ton. L’essai de pull-out est effectu\u00e9 dans les zones sans barres d’armature, identifi\u00e9es de mani\u00e8re appropri\u00e9e au moyen d’un pacom\u00e8tre. Trois essais d’extraction sont effectu\u00e9s pour chaque partie examin\u00e9e. <\/p>\n

Normes techniques de r\u00e9f\u00e9rence: UNI EN 12504-3:2005; UNI 10157\/1992.<\/p>\n<\/div><\/div><\/div><\/div><\/div>

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