Unconfined compression


 The LoadTrac II load frame provides compression/extension testing for a number of geotechnical tests that must have accurate control of the rate of displacement during loading.  With accessories, the unit can perform unconfined compression, CBR, and triaxial shear phase testing.

The base unit includes a stepper motor, lead screw, vertical tension rods and crosshead, displacement transducer, electronic controls and network communications.  Versions of the unit are available to test loads up to 90 kN (20,000 lbs.).  Displacement rates can be set to any value between 0.00003 and 15 mm per minutes (0.000001 to 0.6 inches per minute). 

The base unit can run in stand-alone mode without a computer.  It includes built-in data acquisition and display capability.  Sensor readings are displayed in Sl or English units and stored in memory.

Optional software running in Windows® 2000, XP, or Vista completely automates the test, reducing the data and preparing test results.


• Choose capacity to fit user needs from 22, 45 and 90 kN (5,000, 10,000 and 20,000 lbs.) models

• Total automation of data collection and reporting of test results

• Prepare tables and plots of report quality within minutes of completing a test

• Generate columns of data for easy reduction using your own spreadsheet software

• Ability to access and control the unit over a computer network using Geo-Net option


• ASTM D-2166, AASHTO T-208 Unconfined Compression Testing of Soils

• ASTM D-1663 Compressive Strength of Molded Soil-Cement Cylinders


MOTORStepper motor with built-in controls
TRAVELBuilt-in displacement transducer with 76 mm (3 in.) range and 0.0013 mm (0.00005 in) resolution
DISPLACEMENTControl from 0.00003 to 15 mm per minute (0.000001 to 0.6 in. per minute)
POWER110/220 V, 50/60 Hz, 1phase
LoadTrac II464 mm x 546 mm x1206 mm (18 in. x 21.5 in. x 47.5 in.)
LoadTrac II55 kg (120 lbs.)
LTII-10,00045 kN (10,000 lbs.)
LTII-20,00090 kN (20,000 lbs.)
LTII-50,000222 kN (50,000 lbs.)
702075 mm (3.0 in) platen with load cell adaptor
Geo-NET™Network/Communication card and cable to link load frame to PC.
UCSoftware package to automatically run and report UC tests
UC ReportEditing/reporting software for multiple tests

For viewing forms of the report and the interface of the operating program click the mouse on a corresponding miniature.