The Kinexus DSR rheometer is a dynamic shear rheometer for routine analysis and QC testing in the Asphalt industry. The rheometer has a ‘plug and play’ function for use with all measuring systems and environmental control units.
The Kinexus DSR is designed for revolutionary standard operating procedure (SOP)-based testing, with access to basic rheological test modes and featuring an integrated library of standard test protocols for asphalt.
The Kinexus DSR is a rotational rheometer that can apply controlled shear deformation to a sampleto enable measurement of flow properties such as the shear viscosity from flow tests, and dynamic material properties such as the phase angle and viscoelastic modulus from oscillation tests.
The Kinexus DSR incorporates technological innovations that enable flexibility in rheological test capabilities and protocols - for meeting quality control requirements in the Asphalt industry.
The main features of the Kinexus DSR rheometer are as follows:
- Grade testing that complies with industry standards such as EN and AASHTO specifications, with time-temperature superposition for master curve generation
- All modes of rheological operation such as stress control, shear rate control and direct strain controlled oscillation at demand strain amplitude, are offered for the precise control of sample strain history
- Several measurement geometries optimized for a range of rheological characterizations from liquid binders through to solid asphalt cores
- Smart geometry recognition with 100% auto-configuration and user feedback on the system status to ensure robust data for all measurements
- As a standard, the full sample history from the first step of loading onto the rheometer is available in a data file format, thereby ensuring consistent rheology data for complex materials, such as asphalt
- Penetrometer adapter for automatic penetration testing of asphalt binders and solids fixtures for measuring fatigue or accumulated strain testing of asphalt cores
- Innovative rSpace software interface offers 100% flexibility of the test set-up spanning from sequence-driven SOP-type functionality to wholly customizable test design
- Outstanding vertical travel and gapping capabilities coupled with ultra-responsive and highly sensitive normal force systems to guarantee class-leading performance
- Innovative ‘plug and play’ cartridge system for all temperature and environmental controls, enabling all communication, power, mechanical and fluid connections to be performed in one easy step
- Multi-operational accessory design e.g., plate cartridges comprising interchangeable lower plates, and cylinder cartridges comprising interchangeable cups, ensuring cost-effectiveness and a wide application range.
Our voice is easy to take for granted, until we lose it. For those who use their voice as a primary tool of trade however, knowing how to protect the ability to talk clearly is critical. Singers, actors, ministers and coaches all rely on talking to carry out daily duties. School teachers, however, are the most likely to experience problems – they are two to thirty-two times more likely to have a voice problem in their lifetime than other professional voice users. Our research aims to help professional speakers save their voices. The rheology system we have set up allows us to gather data on how cells in the larynx respond to vibrations at particular frequencies over time; simulating everything from normal, conversational speech - around 125 Hertz in males and 200-220 Hz in females - to situations of over use. Our results can help steer laryngologists towards selecting the most appropriate injectable in those cases where damage has already been done. We also intend to increase our general understanding of how our vocal cords function so we might develop prevention techniques. The rheology is collected using a thoroughly vetted Gemini rheometer, known to be accurate and reliable at low frequencies in the range 0.01-100 Hz. A specialized piezo-electric drive unit coupled to the rheometer is then applied to multiple samples across frequencies in the range 1- 2000 Hz, allowing confirmation of accuracy in the overlapping measurements in the 1- 100 Hz cross over. By characterizing the viscoelastic properties of human vocal folds, engineers can optimize the material formulation to suit actual frequencies that humans use in speech.
Dr Sarah A. Klemuk, Assistant Research Scientist, Department of Communication Sciences & Disorders at the University of Iowa