Accurate. Cost-Effective. Standards-Compliant.
The SA4PT is a reliable, lab-scale four-point bending beam testing machine designed for high-throughput fatigue and modulus testing of asphaltic paving materials. Combining low cost with high precision, it’s ideal for laboratories needing repeatable and standards-compliant results.
Why Choose the SA4PT?
This stand-alone unit uses advanced servo pneumatic technology and a high-speed digital data acquisition system, delivering real-time graphical and tabular test data. Designed for ease of use and accuracy, the SA4PT supports both controlled strain and controlled stress modes to assess stiffness modulus and fatigue resistance.
The system is equipped with clamps positioned at 118.5 mm centres and a 335.6 mm (14-inch) outer span, meeting AASHTO T321 specifications. Beam height and width can be adjusted to accommodate different specimen sizes.
Note: Testing beams containing aggregates >20 mm does not fully comply with EN 12697-24 Annex D. This must be reported in accordance with the standard.
Typical Applications:
- Asphalt mix design validation
- Evaluation of end-product performance
- Research and development of new paving materials
Key Features:
- Fully complies with:
- EN 12697-24 Annex D
- EN 12697-26 Annex B
- ASTM D7460
- AASHTO T321
- High-performance ceramic spool servo-valve with ultra-low friction actuator
- On-specimen and floating beam deflection measurement
- Low-compliance, rigid test frame for maximum accuracy
- Constant torque motorised specimen clamping – prevents beam indentation
- Automatic sinusoidal loading control: strain or stress mode
- Industry-leading performance in TU Delft's international fatigue Round Robin (Participant 13)
- Supplied with calibration certificate
- Manufactured in the UK
Software:
Intuitive Windows™ software tailored to EN standards
- Multi-language interface available upon request
- Real-time graphical and tabular data display
- Export and analysis in Microsoft Excel™ compatible format
- Built-in utilities:
- System input/output testing
- Phase correction
- Transducer calibration database
- Curve fitting and comparison tools
Specifications:
- Parameter Value
- Force Transducer ±5 kN
- Specimen Displacement Range ±1 mm
- Actuator Stroke 10 mm
- Frequency Range 0.1 to 60 Hz*
- Electrical Supply 220–240 V, 50 Hz @ 13 A (Others on request)
- Compressed Air 7–10 bar @ 600 L/min
- Test Frame Dimensions (mm) 440 (W) x 190 (D) x 570 (H)
- Data Box Dimensions (mm) 360 (W) x 280 (D) x 140 (H)
- Working Space (with cabinet) 826 (W) x 1650 (D) x 2100 (H)
- Weight Test Frame: 45 kg / Data Box: 6 kg
- PC Included
* Load limitations may apply at higher frequencies.
Optional Accessories:
Available separately
CRT-TCC: Temperature Controlled Cabinet
CRT-PVC-BEAM: PVC Dummy Beam Specimen (50 x 50 mm)