Gilson Company, Inc. Dynamic Shear Rheometer,DSR-II, Air-Bearing, 220V/50Hz HM-86F

The Dynamic Shear Rheometer (DSR) determines linear viscoelastic properties of performance-graded asphalt binders at temperatures from 5°-85°C (41°-185°F). A disc of asphalt binder is confined between circular parallel plates at a specified temperature, and one of the plates is oscillated at a known torque. Dynamic shear modulus and phase angle properties are measured. HM-86 Air-Bearing DSR tests asphalt binder in standard QC/QA testing and some research applications. The instrument can be operated in strain control or stress control modes. The system includes a torque-measuring drive for determining strain and a circulator system to immerse the sample in fluid (usually water) at a constant temperature. The lower specimen plates hold the sample in place, while the upper measurement plates oscillate to produce strain. 8mm and 25mm upper and lower stainless steel specimen plates are provided, as well as a RTD temperature device. A special “NO GAP" feature, alleviates the need for the operator to re-zero the instrument gap when upper or lower plates are removed, replaced or at temperature changes. The two marked SHRP testing positions are easily selected and locked. The latest ASTM and AASHTO protocols are built into software and PG Grading determinations are automatic. The HM-86 DSR requires an air supply of 1 SCFM at 60psi. Est. Ship Wt.: 240lb (109kg). HMA-356 Silicone Rubber Mold Set is required, but purchased separately. The set includes one each, 8mm and 19mm diameter flexible, tear-resistant silicon molds, and is normally stocked and ready for immediate shipment. A Windows® compatible PC such as Gilson’s HM-354 system is also required, along with a printer. Inquire for up-to-date system specifications. The HMA-353 Reference Thermal Detector Probe, a thermistor mounted in a silicone wafer calibrated to 0.1°C, is recommended. This device allows direct, in-place calibration of the RTD temperature detector. The HMA-355 2.7 million centipoise Viscosity Standard fluid is designed specifically for the DSR and is NIST traceable. It is available in 15ml bottles. System price includes one-year warranty, installation and training in continental U.S.A., one year of software updates, and a technical support hotline.