Images below courtesy of Controls Testing Equipment Ltd.

300mm Large Scale Shear Box

Item UKAS Description £ Unit
5.11 UKAS  Consolidated Drained Peak and Residual Shear Strength - set of 3 60 x 60mm Shear Box Specimens (5 days)
1377 : 1990 Part 7 : 4 
230.00 per set 3
5.18 UKAS  Consolidated Drained Peak Shear Strength - set of 1 - 60 x 60mm Shear Box Specimens by Direct Shearing
1377 : 1990 Part 7 :4 
65.00 1
5.09 UKAS  Consolidated Drained Peak Shear Strength - set of 3 - 60 x 60mm Shear Box Specimens by Direct Shearing (3 days)
1377 : 1990 Part 7 :4 
141.75 per set 3
5.08 UKAS  Immediate Shear Strength - set of 3 60 x 60 mm Shear Box Specimens by Direct Shearing (note suitable for free draining material only)
BS1377 : Part 7 :1990 Clause 4 
89.25 per test
5.14   Large Shear Box 300mm Peak with 3 confining pressures includes remoulding
(BS1377 : Part 7 : Clause 5 : 1990) and (Specification for Highway Works Vol.1 Clause 636 Part 2) 
320.00 per set 3
5.02   Natural Shear Strength by Hand Vane (3 measurements)
9.00 per test
5.05 UKAS  Quick Undrained Triaxial Compression Test - Multi-stage Loading of a single specimen (100mm diameter)
1377 : 1990 Part 7 : 9 
26.00 per test
5.03 UKAS  Quick Undrained Triaxial Compression test - set of 3 - 38mm diameter specimens
1377 : 1990 Part 7 : 8 
29.00 per test
5.04 UKAS  Quick Undrained Triaxial Compression test - single specimen at one confining pressure (100mm or 38mm diameter)
1377 : 1990 Part 7 : 8 
21.00 per test
5.06   Residual Shear Strength using the small Ring Shear apparatus at 3 normal pressures
185.00 per test
5.18   Sample preparation for small shearbox - Covers screening, mixing to a client specified moisture content and remoulding.
9.00 per sample
5.15   SHW636 - Large Shear Box 300mm
SHW 636 & 1377 : 1990 Part 7 

The system comprises two modules:

  • The drive unit is mounted on a movable, wheeled frame with a handle.
  • The shear box comprises a removable upper half and a lower half which is provided with four legs and is stationary

The frictional resistance between geotextiles, fine gram soils or any combination of soil and geotextiles 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 fabric is sandwiched between the two sample box halves, normal and shear forces are applied to determine the point of failure.

Vertical loading is applied to the sample with a precision regulator and flexible, compressed air filled, diaphram, fitted to the upper box. Alternatively, the shear box can be supplied with an optional rigid platen system The horizontal load is regulated by the DC servo motor control system.

This is made from high quality materials for reliability and ease of operation. It may be upgraded if there is future need for the application of higher loads. Major components are black, hard-coat, anodized aluminum or steel, zinc plated

The GSTL Large Scale Direct Shear Box has the ability to 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.

This Model provides a 12 x 12 in (305 x 305 cm) shear zone for determining the interface frictional characteristics of individual geotextile components or remolded soil interacting with a geotextile.

  • A break-away box and drive system for enhanced efficiency
  • A stainless steel tank for submerged sample testing to emulate field conditions
  • The normal load is applied with a flexible bladder or optional air hydraulic cylinder attached to a rigid platen
  • Linear bearings keep horizontal movement friction to a minimum
  • Digital readouts with RS 485/232 output for measuring load, displacement, settlement and pressure
  • Pressure Transducer provided with a quick connect allows use with both a normal and fixed platen

Schematic Geomembrane and Soil