Incremental consolidation by LoadTrac II system
LOADTRAC II
LoadTrac II system for incremental consolidation and swell testing fully automates an entire consolidation test. Constant load and constant volume swell tests can be run automatically. Once a sample is placed into the load frame, the test conditions programmed, and the test started, the LoadTrac II system performs the complete test without intervention by the user. The computer automatically increments to the next stress by using conditions specified by the user. Incremental consolidation test can be completed in 24 to 48 hrs. on most materials.
The LoadTrac II system utilizes a high speed, precision micro-stepper motor to apply the vertical load to the soil specimen. An embedded control board with a dedicated CPU takes readings from the force transducer and displacement transducer to control the stepper motor.
The base unit includes built-in data acquisition and display capability. Sensor readings are displayed in SI or English units and stored in memory. For incremental consolidation, the base unit is linked to a PC using the network communications module and the appropriate software.
Optional software running in Windows® XP, or Vista completely automates the test, reducing the data and preparing test results.
USER BENEFITS
• Choose capacity to fit user needs from 22, 45 and 200kN (5,000, 10,000 and 40,000 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 controlled over a computer network
• Generate columns of data for easy reduction using your own spreadsheet software
APPLICABLE TEST STANDARDS
• ASTM D-2435 Incremental Consolidation
• AASHTO T-216 Incremental Consolidation
• ASTM D-4546 One dimensional swell or settlement potential of cohesive soils
TECHNICAL SPECIFICATIONS
MOTOR | Stepper motor with built-in controls |
TRAVEL | Built-in displacement transducer with 76 mm (3 in.) range and 0.0013 mm (0.00005 in) resolution |
DISPLACEMENT | Control from 0.00003 to 15 mm per minute (0.000001 to 0.6 in. per minute) |
POWER | 110/220 V, 50/60 Hz, 1 phase |
DIMENSIONS | |
LoadTrac II | 464 mm x 546 mm X1206 mm (18 in. x 21.5 in. x 47.5 in.) |
WEIGHT | |
LoadTrac II | 55 kg (120 lbs.) |
MODELS | |
LoadTrac II Models | Frame capacity |
LTII-10,000 | 45 kN (10,000 lbs.) |
LTTI-20,000 | 90 kN (20,000 lbs.) |
LTII-50,000 | 222 kN (50,000 lbs.) |
ACCESSORIES | |
1220 | All stainless steel consolidation cell includes 63.5 mm (2.5 in.) sample ring, top cap, top and bottom porous stones. |
Geo-NET™ | Network/Communication card and cable to link load frame to PC. |
ICONP | Software package to automatically run incremental consolidation test and swell tests with excess pore water pressure measurements capability |
OPTIONS | Consolidation cell with back pressure and pore pressure measurements capabilities |
For viewing forms of the report and the interface of the operating program click the mouse on a corresponding miniature.