The 4 Point Bend Apparatus is a stand-alone system for four-point fatigue life testing of asphalt beams subjected to repeated flexural bending.
The cradle mechanism allows for backlash free rotation and horizontal translation of all load and reaction points. Pneumatic actuators at either end of the cradle center the beam laterally and clamp it. Servo-motor driven clamps secure the beam at four points with a pre-determined clamping force. Haversine loading is applied to the beam via the built-in digital servo-controlled pneumatic actuator. The innovative “floating” on-specimen transducer measures and controls the true beam deflection irrespective of loading frame compliance.
The system uses IPC’s world class IMACS digital controller and UTS software with test modules for international and local standards ensuring it is easy to set up and conduct your tests.
Software has been developed to automatically perform the various standards including: AASHTO T321, AST 03. At frequencies up to 20Hz. The latest Windows-based software allows for both controlled strain and controlled stress loading.
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