Geosynthetics Testing (Interface Shear Box)

It provides a 12 x 12 inch (305 x 305 mm) shear area and works with both consolidated-drained and saturated samples. Optional accessories allow for consolidation testing.

The Large-scale Interface Shear Box can apply and monitor a wide range of normal and shear loads to provide the data needed for commercial design, research, and quality control. The use of a detachable drive system allows a single drive unit to be used with several shear boxes. This efficient use of the drive unit is significant in test situations where soil saturation or sample set-up is a major time factor.

The frictional resistance between geosynthetics, fine grain soils, or any combination of soil and geosynthetics may be measured. The tests may be conducted in saturated conditions as the test module box can be filled with water. This enables true simulation of the site conditions. The geosynthetic is sandwiched between the two sample box halves and normal and shear forces are applied to determine the point of failure.

Vertical loading is applied to the sample by compressed air acting on a flexible bladder fitted to the upper box. The load is controlled with a precision air regulator.

Data is displayed on four digital readouts with download capabilities.