Resilient Modulus and Asphalt Testing System(MRT-300)

The GCTS Resilient Modulus and Asphalt Testing System boasts a modular design which allows the system to be configured to test asphalt and soil in a variety of modes. This system is based on the GCTS SCON Digital Signal Conditioning and Controller and can be supplied with pneumatic or hydraulic loader.

The GCTS Resilient Modulus and Asphalt Testing System boasts a modular design which allows the system to be configured to test asphalt and soil in a variety of modes. This system is based on the GCTS SCON Digital Signal Conditioning and Controller and can be supplied with pneumatic or hydraulic loader.

The GCTS Resilient Modulus software features built in AASTHO, SHRP, and NCHRP test sequences, and the capability to specify user defined sequences. Contact stress is automatically adjusted according to the above procedures as selected. Available waveforms include haversine, sine, square and triangular, along with a user defined waveform selection. Optional peak & valley compensation ensures proper and quick matching of the load parameters. Real time displays of the prescribed versus actual dynamic load or the dynamic deformation measurements by each sensor are always present. Deformation ratio of the two sensors, Rv (to ensure that the two deformation sensors are in agreement) and Mr are also calculated in real time. During export, curve fitting is done to fit the results to models that predict Mr as a function of σm, σd, and CP (cell pressure). Four different functions are calculated automatically (as required by AASHTO and NCHRP procedures):

• Mr = K1 (σm)K2

• Mr = K1 (σd)K2

• Mr = K1 (σd)K2 CPK3

• Mr = K1 Pa[(Θ-3K6)/Pa]K2 [τoct/Pa + K7]K3

For testing asphalt at different temperatures, an optional environmental chamber can be provided. This chamber can accommodate triaxial, indirect tension, beam flexural fatigue, dynamic modulus and all the other testing fixtures GCTS offers. Temperatures of ‑30° to +150°C (with liquid nitrogen boost) can be achieved with this option.

 

Geotechnical Consulting & Test Systems (GCTS), USA

Geotechnical Consulting & Test Systems (GCTS), USA

Geotechnical Consulting and Testing Systems (GCTS) provides advanced testing solutions for Research in Geotechnical & Pavement materials. GCTS also helps in design of laboratory and in-situ testing apparatus and software ranging from modification and adaptation of existing apparatus to the purchase of new closed-loop computer-controlled systems. The company manufactures a full line of computer-controlled testing systems with either pneumatic or hydraulic loaders. Each system comes with a versatile software package which provides test control, data acquisition, data reduction, and graphing in one easy to learn Graphical User Interface.

 

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