Stand-Alone Beam Flexural Fatigue Apparatus(BFF-5)

The GCTS Stand-Alone Beam Flexural Fatigue Apparatus is an advanced Hot Mix Asphalt (HMA) testing system used to determine the fatigue life of the pavement layer.

The GCTS Stand-Alone Beam Flexural Fatigue Apparatus is an advanced Hot Mix Asphalt (HMA) testing system used to determine the fatigue life of the pavement layer.The fatigue life is an important indicator of the field performance of asphalt subject to repeated flexural loading. The fatigue test on the asphalt beam can be conducted in two modes: constant strain/deflection or constant stress/load; both utilizing haversine, sine, square, triangular or user defined waveform. The constant strain mode is recommended for thinner pavement layers (< 5” thickness); while in thicker pavements (> 5” thickness) constant stress loading simulates the field conditions more closely. The BFF-5 can perform the fatigue test in both modes at frequencies up to 60 Hertz*.

The BFF-5 stand-alone apparatus is a self-contained system featuring cradle support for the asphalt beam, clamps with controlled clamping force, LVDT, strain gauge and servo-controlled pneumatic actuators. The BFF-5 is controlled with the GCTS Signal Conditioning and Control Unit (SCON-2000) which is interfaced through Windows© Computer Aided Testing Software (CATS) package. The software automatically obtains the fatigue life parameters such as: initial stiffness, maximum tensile stress/strain, flexural stiffness, phase angle, dissipated energy per cycle, cumulative dissipated energy to failure and number of cycles to failure.

The standard beam fatigue test is performed at intermediate temperatures of 20°C (68°F). GCTS offers an optional environmental chamber capable of controlling the specimen temperature throughout the test. The environmental chamber control accuracy is better than ±0.5°C. Temperatures of ‑30° to +150° (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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