SOIL – Impact

FIELD PENETROMETERS

admin — Mon, 19 Dec 2022 05:04:57 +0000

Available seveval models of field penetrometers:

Dynamometric ring penetrometers: for measuring static penetration
Proctor Penetrometers: for measurement of the degree of compaction of a soil sample
DCP and lightweight dynamic penetrometers: for determining the geomechanical properties of road pavement layers.

SAMPLING AND CLASSIFICATION

admin — Mon, 19 Dec 2022 05:04:05 +0000

Sampling and Classification are two basic steps that precede laboratory testing.

Manual and motorized samplers and various equipment ideal for soil classification are available.

SOIL MECHANICS – TRIAXIAL

admin — Mon, 19 Dec 2022 05:03:05 +0000

The triaxial test brings the sample back to its site conditions through the varius steps characterizing the triaxial test (saturation, consolidation) and measure the material resistance to shearing and the connections between stress and strain.

During the standard triaxial test the sample is die-cut or reconstructed in a cylindrical shape, wrapped by an impermeable membrane, laterally confined by hydraulic pressure inside a cell and finally subjected to an axial load which generates the sample breaking.

Various standard triaxial systems, from teaching purposes to advanced laboratory needs, are available complete with dial gauges, dynamometric rings and data acquisition systems for the upgrading.

The Automatic Static and Dynamic triaxial machines complete the range, equipped with control units and first level software which can be completely programmable and controllable remotely.

SOIL MECHANICS – SHEAR

admin — Mon, 19 Dec 2022 05:01:54 +0000

The shear test on soil specimens is performed to measure the resistance to shearing of all those specimens subjected to an orthogonal pressure to the plane.

The sample is placed between two porous stones and metal grids inside a sturdy metal box divided into two halves.

Different versions of shear testing machines are available, from the basic version used for teaching purposes with vertical load application through calibrated weights and dial gauges, to the most advanced and high-performing shear testing machine with fully automatic vertical load application.

Shear speed is applied by means of an electric motor and can be set or calculated automatically according to the consolidation obtained.

SOIL MECHANICS – CONSOLIDATION

admin — Mon, 19 Dec 2022 05:00:32 +0000

The one-dimensional consolidation test, or oedometric test, provides information on the compressibility of a sample restrained laterally while subjected to vertical load. The test can be performed in order to determine the correlation/ratio between the applied pressure and the resulting deformation, or between vertical deformation and time during which a constant pressure is applied. A cylindrical sample is inserted in a non-deformable metal ring and placed between two porous stones (to ensure water drainage and optimal amount of moisture).

Two versions of Oedometer are available: a version with manual application of weights typically used for educational purposes, and a version with fully automatic loading steps application.