NF EN ISO 12957-1
Geosynthetics - Determination of friction characteristics - Part 1 : direct shear test
ISO 12957-1:2005 describes a method of determining the friction characteristics of geotextiles and geotextile-related products in contact with a standard sand, i.e. sand with a specified density and moisture content, under a normal stress and at a constant rate of displacement, using a direct shear apparatus. The procedure can also be used for testing geosynthetic barriers.
ISO 12957-1:2005 describes a method of determining the friction characteristics of geotextiles and geotextile-related products in contact with a standard sand, i.e. sand with a specified density and moisture content, under a normal stress and at a constant rate of displacement, using a direct shear apparatus.
The procedure can also be used for testing geosynthetic barriers.
La présente norme décrit une méthode de détermination de l'angle de frottement entre une géomembrane et un sable normalisé. Cette norme permet de classer conventionnellement les géomembranes par rapport à cette propriété; elle définit uniquement un essai d'identification. La détermination des caractéristiques de frottement sol-géomembrane est une mesure complexe, fonction de très nombreux paramètres : type de sol, conditions de mise en oeuvre de ce sol, vitesse d'essai, gamme des contraintes normales exercées, dimensions des boîtes de cisaillement, Aussi, en complément d'essais de performance permettant de déterminer les paramètres de frottement nécessaires au dimensionnement d'un ouvrage donné, il est apparu utile de disposer de l'essai d'identification qui fait l'objet de la présente norme.
<p>This document specifies an index test method to determine the friction characteristics of geosynthetics in contact with a standard sand as described in EN 196-1, i.e. with a specified density and moisture content, under a normal stress and at a constant rate of displacement, using a direct shear apparatus.</p> <p>The same testing procedure can be used with any type of soil with the density and moisture content that are required to evaluate the performance under specific conditions or with another geosynthetic under a normal stress and at a constant rate of displacement, using a direct shear apparatus.</p> <p>The procedure can also be used for testing geosynthetic barriers.</p>
- Avant-proposv
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1 Domaine d'application1
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2 Références normatives1
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3 Termes et définitions1
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4 Principe2
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5 Éprouvettes2
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6 Conditionnement3
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7 Appareillage3
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8 Mode opératoire5
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9 Calculs6
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10 Rapport d'essai7
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