Marshall Digital Machine for Asphalt Testing

The Marshall Digital Machine is designed for accurate determination of Marshall stability and flow values of asphalt specimens under controlled laboratory conditions. The applied load is automatically measured by a high-precision load cell and displayed on the digital control unit throughout the test.

An electronic LVDT displacement transducer continuously measures specimen deformation, allowing automatic flow calculation with high accuracy. The advanced digital control system displays real-time test data and the load-displacement curve while enabling fully automated testing through computer connectivity and dedicated testing software.

The standard system is supplied with a digital LCD control unit, load cell, LVDT displacement transducer, and a Marshall breaking head suitable for 100 mm (4 inch) diameter specimens.

Key Features of the Marshall Digital Machine

• Automatic load measurement
• High-precision load cell
• Advanced digital control unit
• Electronic LVDT displacement transducer
• Automatic flow calculation
• ±0.1% linearity
• Real-time load and displacement display
• Live test curve visualization
• Computer connectivity
• Software-controlled testing
• Automatic test data acquisition
• Includes Marshall breaking head for 100 mm specimens
• Suitable for Marshall stability and flow testing

Standards

• EN 12697-34
• BS 598-107
• EN 13108
• ASTM D1559
• ASTM D6927
• EN ISO 7500-1

Marshall Digital Machine Models and Accessories

Technical Specifications

Test Frame

The test frame features a rigid two-column construction with a 50 kN load capacity, specifically designed for Marshall stability testing. A 100 kN capacity model is also available for specialized applications.

Load Measurement

Load is measured using a high-precision load cell operating between 2% and 100% of its capacity with Class 1 or better accuracy in accordance with EN ISO 7500-1.

Displacement Measurement

Specimen deformation is measured using an LVDT displacement transducer with:

• Measuring range: 25 mm
• Resolution: 0.001 mm

This system provides precise and repeatable flow measurements throughout the test.

Servo Electromechanical Drive System

The machine incorporates a precision stepper motor drive system with closed-loop control and high-accuracy mechanical gearing, ensuring smooth, accurate and repeatable loading throughout the testing process.

Digital Control Unit

The machine is equipped with the Sematron Series advanced digital controller, providing:

• Constant load rate control from 0.05 kN/sec to 25 kN/sec
• Displacement rate control from 0.001 mm/min to 60 mm/min
• Automatic piston release after specimen failure
• Ramp loading
• Constant load holding
• Loading and unloading with sinusoidal waveform control
• Dual-loop PID speed and load control
• 1 kHz data acquisition and control
• Automatic sensor recognition
• Automatic calibration
• Minimum 12-channel electronic control architecture
• Fully automatic testing software
• Automatic calculation of test results
• Real-time graphical test display

General Specifications

Universal Testing Software

Powered by UTESTX, the Marshall Digital Machine offers comprehensive software for fully automated testing, machine control and result evaluation.

The modular software architecture supports multiple sensors and hardware configurations while providing:

• Automatic test execution
• Customizable testing procedures
• Compliance with international standards
• Real-time graphical monitoring
• Automatic calculations
• Data storage
• Professional report generation
• User-friendly interface for routine laboratory testing and research applications

Applications of the Marshall Digital Machine

The Marshall Digital Machine is ideal for:

• Asphalt testing laboratories
• Marshall stability testing
• Marshall flow testing
• Hot mix asphalt evaluation
• Load and displacement measurement
• Road and pavement laboratories
• Construction materials laboratories
• Quality control laboratories
• Research and development laboratories
• University laboratories

Why Choose a Marshall Digital Machine?

The Marshall Digital Machine delivers highly accurate digital measurement and control for Marshall stability and flow testing.

Its precision load cell, electronic displacement transducer and advanced Sematron controller provide reliable and repeatable test results with minimal operator intervention. Real-time monitoring, computer connectivity and fully automated testing software improve laboratory efficiency while ensuring compliance with international testing standards.

Frequently Asked Questions About the Marshall Digital Machine

What is a Marshall Digital Machine?

A Marshall Digital Machine is a laboratory testing system used to determine the stability and flow characteristics of Marshall asphalt specimens through digital load and displacement measurement.

What is the Marshall Digital Machine used for?

It is used for determining Marshall stability, flow value, load and specimen deformation during asphalt testing.

How is the applied load measured?

The applied load is automatically measured using a high-precision load cell and continuously displayed on the digital control unit.

How is displacement measured?

Displacement is measured using an electronic LVDT displacement transducer with a 25 mm measuring range and 0.001 mm resolution.

Can the Marshall Digital Machine connect to a computer?

Yes. The machine supports computer connectivity and can perform fully automatic testing using dedicated testing software.

What is the machine capacity?

The standard model has a 50 kN capacity, while a 100 kN version is also available.

What is the data acquisition rate?

The Sematron control system provides 1 kHz data acquisition and control for highly accurate measurement and recording.

Which breaking heads are available?

Digital Marshall Breaking Heads are available for:

• 4 Inch specimens
• 6 Inch specimens

Which standards does the Marshall Digital Machine comply with?

The Marshall Digital Machine complies with the following international standards:

• EN 12697-34
• BS 598-107
• EN 13108
• ASTM D1559
• ASTM D6927
• EN ISO 7500-1