Triaxial and Stress Path


The LoadTrac II/FlowTrac II system for triaxial testing fully automates the conduct of CU, CD and any possible stress path tri-axial test on soils. Once a soil sample is in place, and the test conditions are selected, the LoadTrac II/FlowTrac II system will run the entire triaxial test from start to finish. This system is operated by software which automates the initialization, saturation, consolidation (isotropic, anisotropic or Ko) and shear phases of the test.

The system comes as a complete, selfcontained unit with all of the equipment required to perform fully automated tri-axial and stress path tests. The LoadTrac II/FlowTrac II system utilizes high speed, precision micro stepper motors to apply the vertical load and pressures to the soil specimen. It includes one load frame for vertical stress, one flow pump for cell pressure and one flow pump for back pressure. The system is capable of applying a constant rate of strain at any displacement rate from 0.00003 up to 15 mm per minute (0.000001 to 0.6 inches per minute).

Sensor readings are displayed in SI or English units and stored in memory. With the network communications module and appropriate software, the entire test can be automatically controlled, data captured and displayed in realtime, and test reports prepared on a PC.

Optional software running in Windows® 2000, XP, Vista , 7 completely automates running the test, reducing the data and preparing test results. 


Choose load capacity to fit user needs 44 and 88 kN (10,000 and 20,000 lbs.) models

Total automation, control, data collection and reporting of test results

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

Geo-NET compatibility lets unit be accessed and con-trolled over a computer network

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

Choose volume capacity to fit user needs from 250, and 750 cc models

Accurate displacement rate control from 0.00003 to 35 mm per minute (0.000001 to 1.3 in. per minute)

Accurate pressure and volume measurements with integrated sensors

Stand alone through front keypad and LCD menu capability


ASTM D-4767


COE EM 1110 Consolidated Undrained Compression/Extension tests, Consolidated Drained Compression/Extension tests, Stress Path tests

BS (British Standard)

                      TECHNICAL SPECIFICATIONS 

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 35 mm per minute (0.000001 to 1.3 in. per min.)
FLOW RANGE0.000006 to 3 cc per second
POWER110/220 V, 50/60 Hz, 1 phase
LoadTrac II464 mm x 546 mm x1206 mm (18 in. x 21.5 in. x 47.5 in.)
FlowTrac II203 mm x 406 mm x 470 mm (8 in. x 16 in. x 18.5 in.)
LoadTrac П55 kg (120 lbs.)
FlowTrac II14 kg (30 lbs.)
FlowTrac II Models 
FTII-250-nn250 cc capacity
FTII-750-nn750 cc capacity
nnMaximum pressure range for system: 1400 and 3500 kPa (200 and 500 psi) available (resolution of pressure will be 0.00005 times the range)
LoadTrac II ModelsFrame capacity
LTII-10,00045 kN (10,000 lbs.)
LTII-20,00090 kN (20,000 lbs.)
LTII-50,000222 kN (50,000 lbs.)
ACCESSORIESTriaxial cells up to 305mm (12.00 in.) diameter, membranes, porous stones and sample preparation accessories upon request.

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