**2. Manufacturing mode**

The raw materials used in the manufacture of flexible films are mainly made out of polyethylene.

As the volume and the density are fixed, we put the necessary quantity of plastic in a parallelepiped shape press. After being compressed under high pressure (about 7 bar), and legated the resulting block stayed in shape after it is released. [1].(Fig.1)

Non Linear Viscoelastic Model Applied on Compressed Plastic Films for Light-Weight Embankment 339

The experimental studies of the behavior of the material began by compression and creep tests on full size blocks and completed by several kinds of tests on reduced size samples.

In the purpose to obtain a reduced size sample, tow apparatus were conceived and built. The first one enabled us to make cylindrical samples and the second one is conceived to

The dimensions of real blocks or samples are carefully chosen in order to neutralize the

In addition, two experimental machines are designed and constructed specifically for this

A first apparatus is intended to perform simple compression tests (Fig. 3). The load applied by a bar, was transmitted by a rigid plate that moves while remaining horizontal. This system that prevents the differential deformation is in the form of three rod lubricated to facilitate sliding.[6].

microscopic details and to be able to apply the Continum Mechanics principles.

Reel Material Equivalent Material

**Figure 2.** The principle of the real material and the equivalent one.

**4. Experimental studies** 

produce cubic samples.

**Figure 3.** Apparatus for simple compression test

type of material.

**Figure 1.** Photo of a block
