Hydraulic Asphalt Testing Machine
Systems
ATM-025/100 Servo-Hydraulic Asphalt Testing System


GCTS offers two standard models that are modular systems and are able to be configured to test asphalt in a variety of modes.  Both models can be supplied with an environmental chamber for dynamic complex modulus, flow number, flow time, indirect tension, beam flexural fatigue, and resilient modulus tests.

 

  • Advanced testing for Hot Mix Asphalt (HMA).
  • Dynamic complex modulus, flow number, flow time, indirect tension, beam flexural fatigue, and resilient modulus tests.
  • Electro-Hydraulic Digital Servo Control.
  • 25 kN (ATM-025) or 100 kN (ATM-100) dynamic load capacity.
  • Frequencies up to 70 Hz.
  • Modular design with accurate and easy to use software and electronics.
  • Meets the newest AASHTO (Superpave), ASTM, and European (EN-12697-24,25,26) standards.
  • Complete “turn-key” systems.

 

 

Relevant Standards

 

AASHTO T342 Standard Test method for Determining the Dynamic Modulus of Hot Mix Asphalt (HMA)

 

AASHTO PP62 Standard Practice for Developing Dynamic Modulus Master Curves for Asphalt Mixtures

The GCTS ATM-025/ATM-100 Equipment is a modular system that can be configured to test asphalt in a variety of modes.  Two standard models are offered with the only difference being the load capacity.  The ATM-025 is limited to 25 kN dynamic loads and offers an excellent dynamic accuracy for testing softer specimens (i.e. HMA at elevated temperatures) while the ATM-100 is also able to perform strength tests as required by AAASHTO-322 Creep Compliance and Strength where 100 kN capacity is specified.  GCTS also offers a combination system with a dual actuators (25 kN & 100 kN) for improved dynamic performance at low dynamic loads and fully capable of performing tests to specimen failure.

 

Both systems can be supplied with an environmental chamber which houses the optional accessories required to perform dynamic complex modulus, flow number, flow time, indirect tension, beam flexural fatigue, and resilient modulus tests. The GCTS environmental chamber is a high quality stainless steel chamber with a full size front window and a dual temperature PID control loops of both heating and cooling. Chamber temperature is directly controlled through GCTS application software providing efficient and precise temperature control typically better than 0.2 °C.  This system can either control the chamber air temperature or the internal temperature of any instrumented dummy sample to ensure that test specimens have reached the desired temperature throughout.  A temperature sensor that can be embedded inside a dummy sample is also provided.  The ATM-025/ATM-100 includes a sliding drawer to easily remove/install test specimens minimizing the time the environmental door is open.

 

GCTS has conducted extensive verification of these systems, comparing the results for the full temperature range against Witczak’s predictive model as well as test data on multiple replicates obtained at a leading research university.

  • 100 kN axial load capacity
  • 60 Hz maximum testing frequency
  • Temperature control from -15°C to 60°C

 

Please contact GCTS for full specifications.