Direct Shear Tester
The Electric Direct Shear Tester is a laboratory instrument designed to determine the shear strength of soils. It features high-resolution color display, microcomputer control, and a high-performance servo motor to provide precise, automated, and repeatable testing. The system can perform shear tests on up to four samples simultaneously and includes an automatic stop mechanism for safety.
Application
The Direct Shear Tester is suitable for:
Determining soil shear strength parameters for geotechnical design.
Evaluating slope stability, soil bearing capacity, and foundation performance.
Research and teaching in soil mechanics laboratories.
Quality control and assessment of soil improvement and stabilization projects.
Standards
ASTM D3080 – Standard Test Method for Direct Shear Test of Soils
Parameters
| Item | Technical Parameter |
|---|---|
| Shear Box Size | 60 × 60 mm / 100 × 100 mm (optional) |
| Sample Thickness | 20 – 25 mm |
| Normal Load Capacity | ≥ 5 kN |
| Shear Load Capacity | ≥ 5 kN |
| Load Resolution | ≤ 0.1% |
| Shear Rate | 0.0001 – 1.0 mm/min (adjustable) |
| Load Cell Accuracy | ±1% |
| Displacement Measurement | Resolution ≥ 0.002 mm |
| Loading System | Manual / Motorized |
| Drainage Condition | Drained / Undrained |
| Data Output | Analog / Digital / PC Interface / CSV |
| Power Supply | AC 220 V, 50 Hz |
Features
High-performance servo motor drive reduces vibration and ensures smooth operation.
Color touchscreen display with intuitive microcomputer control.
Adjustable shear rate and load settings for flexible testing.
Capable of testing multiple samples simultaneously (up to four).
Automatic stop mechanism for safe operation.
Supports both drained and undrained test conditions.
Data logging with PC interface and CSV export for analysis.
Accessories
Shear box assembly (upper & lower)
Normal loading system
Shear loading system
Load cell / proving ring
Dial gauge / LVDT (horizontal & vertical)
Drive unit (manual / motorized)
Control & data logger
Test Procedures
Prepare the soil sample and place it in the shear box assembly.
Set normal load and select shear rate on the touchscreen control system.
Begin the test; the system applies shear load automatically while measuring horizontal and vertical displacements.
Monitor real-time load–displacement data on the display or via PC interface.
Upon completion, retrieve results and export data for analysis.
Maintenance Information
Regularly clean shear boxes and loading components to prevent soil residue buildup.
Inspect LVDT sensors, load cells, and proving rings for calibration accuracy.
Lubricate mechanical parts as needed for smooth operation.
Verify software calibration and interface connectivity periodically.
FAQ
What is this product?
It is a laboratory device used to determine the shear strength of soils under controlled conditions.
What is this product used for?
It evaluates soil stability, bearing capacity, and provides key parameters for geotechnical engineering design.
Why is this product important?
Accurate soil shear strength data ensures safe and efficient foundation design, slope stability analysis, and earthwork construction.
What industries is this product suitable for?
Geotechnical engineering, construction, research laboratories, teaching in soil mechanics, and quality control of soil improvement projects.
What types of this product are available?
Manual or motorized electric shear testers with single or multi-sample capability, supporting drained and undrained tests.
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