Marshall Stability Load Frame

The Marshall Load Frame is a heavy-duty motorized testing frame designed for determining the stability and flow characteristics of compacted asphalt specimens. With a 10,000 lb capacity and a fixed loading rate of 2 in/min, MM-7690 provides the controlled loading required for traditional Marshall testing and can also support Lottman/indirect tensile testing when equipped with the appropriate fixtures and instrumentation. 

Key Features

• Supports ASTM D5581 and ASTM D6927 Marshall Stability and Flow testing, ASTM D6931 indirect tensile strength, ASTM D4867 moisture-effect testing, AASHTO T 245 Marshall testing, and AASHTO T 283 moisture-damage testing when configured with the appropriate accessories. 
• 10,000 lb / approximately 44.5 kN maximum load capacity
• Fixed 2 in/min / 50.8 mm/min loading rate required for Marshall stability testing
• Heavy-duty construction for routine asphalt laboratory use
• Precision loading screw provides controlled platen movement
• 3" / 76.2 mm platen travel
• Adjustable crossarm accommodates different test fixtures and instrumentation
• Upper and lower limit switches control platen travel
• Indicator lights show when platen travel limits are reached
• Three-position control provides up, stop, and down platen movement
• Can be configured for either manual load/flow measurement or electronic data acquisition

Included Items

• Marshall Load Frame
• Motorized loading system
• Loading platform/platen
• Adjustable crossarm
• Upper and lower travel-limit system
• Power and directional controls

The Marshall breaking head, load ring or load cell, flow meter/LVDT, and data-acquisition equipment are nots included with the base MM-7690 load frame and should be selected separately according to the desired test configuration.

Typical Applications

• Marshall stability and flow testing
• Asphalt mix design
• Asphalt QC/QA testing
• Indirect tensile/Lottman testing with appropriate fixtures
• Moisture-susceptibility testing
• DOT asphalt laboratories
• Asphalt producer and contractor laboratories
• Commercial materials-testing laboratories
• University and research laboratories

Specifications

Load capacity: 10,000 lb / approximately 44.5 kN
Loading rate: 2 in/min / 50.8 mm/min
Platen travel: 3" / 76.2 mm
Electrical: 115V
Test operation: Motorized, fixed strain rate

Lab Manager's Tip

The load frame is only one part of a complete Marshall stability and flow system. For a traditional analog setup, pair MM-7690 with the appropriate 4" or 6" Marshall breaking head, calibrated load ring, and flow meter. For a more efficient digital setup, use a load cell, LVDT, and compatible two-channel data-acquisition system to capture load and deformation electronically.

For laboratories performing a high volume of Marshall tests, I would favor the digital configuration. It reduces manual reading and transcription while giving the lab a better path toward electronic test records.

Consider InstroTek SmartLoader for a more comprehensive load frame - 294.3300

• User Manual