Standard Practice for Determination of 2 % Secant Modulus for Polyethylene Geomembranes

Importancia y uso:

4.1 Where to draw the tangent to determine the modulus of elasticity is often unclear when performing tensile tests with polyethylene geomembranes. This problem results in a wide variation in test results and, therefore, makes this property unreliable for comparisons.

4.2 A secant modulus based on 2 % strain can be useful when making comparisons between materials, in quality control, and in comparing the same sample after being subjected to a nonstandard environment.

4.3 Secant modulus is an approximation of modulus of elasticity and generally results in a lower value than that for the modulus of elasticity.

4.4 Although the technique for measuring 2 % secant modulus is described here, other percent secant moduli can be measured by this practice.

Subcomité:

D35.10

Referida por:

D4439-24A, D6434-12R18, D5747_D5747M-21

Volúmen:

04.13

Número ICS:

59.080.70 (Geotextiles)

Palabras clave:

geomembranes; polyethylene; secant modulus;