Superpave Gyratory Compactor by Pine Instruments prepares hot mix asphalt specimens for Superpave mix design operations and is made in the USA. A mold with an asphalt specimen is gyrated on its longitudinal axis at a fixed angle while the end platens are held parallel. The HM-685 models also test a wide range of materials, including soils, emulsion-based mixes, and roller-compacted concrete.
Variable user settings regulate compaction pressure, angle adjustment, gyrations, and adaptability for different-size molds, enabling versatility in a variety of applications. An integrated computer with two USB ports and an Ethernet jack manages settings through a simple menu interface, and a four-button control panel simplifies machine operation.
The computer also sets the angle of gyration and allows the user to switch between internal and external angle settings with little effort. The control system is network compatible for complete data management. The number and angle of gyrations, specimen height, and consolidation pressure can be sent through an Ethernet cable to a network or to a standalone PC or stored on a flash drive.
Operation modes can be set to a specified number of gyrations, a specified sample height, or a locking point, all at a selected internal or external angle. Total gyrations can be selected from 0 to 999 at 30 ±0.5 gyrations per minute and 0° to 1.50° internal or external angle, with compaction pressure selectable from 200 to 999kPa. The final specimen height is user-controlled from 0 to 200mm.
A built-in specimen extruder and a completely enclosed compacting chamber are convenient safety features, minimizing the lifting of hot, heavy molds and shielding moving parts. Units are equipped for 150mm dia. specimen sizes, but can be configured to use 100mm with a conversion kit. Precision machined steel mold assemblies are ordered separately in 150 or 100mm ID.
HM-685S Superpave Gyratory Compactor is an advanced model, factory-equipped to measure and graph gyratory shear, the force required to gyrate the specimen. The data can be depicted as gyratory shear force vs. gyrations or as shear force vs. percent air voids. This information provides insight into the workability and compatibility of a mix. Specimen Cooling Door is for the HMA-685S model only and is sold separately.
Power requirements are 115V, 50/60Hz for HM-685 or HM-685S or 230V, 50/60Hz for the HM-685F or HM-685SF. Inquire for other electrical configurations.
Features
- Designed for compaction of hot mix asphalt for Superpave mix designs
- Meets or exceeds requirements for ASTM D6925 and AASHTO T 312
- Efficient and adaptable for compacting hot-mix asphalt and other materials
- Complete user-control of compaction pressure, angle adjustments, and gyration
- A straightforward four-button control panel simplifies machine operation
- The final specimen height is user-controlled from 0 to 200mm
- Built-in Extruder
Included Items
- Superpave Gyratory Compactor, with or without Shear Measurement (115V, 50/60Hz or 230V, 50/60Hz)
Accessories
- Mold Assemblies are sold separately and provide more efficient sample processing and preparation.
- Mold Funnel makes it easier to funnel asphalt into the 150mm mold.
- Rapid Angle Measurement Device used to check the internal angle of gyration and gyratory shear force measurement.
- Load Ring and Gauge Blocks are used together to verify applied loads and height measurements.
- Specimen Lift Handles are used to easily handle mold specimens.
- Conversion Kit converts 150mm mold to allow compaction of 100mm samples.
- External Angle Measurement Jig calculates the external angle of the gyration.
- Specimen Cooling Door reduces waiting times for specimen cooling and is available only for HMA-685S models with shear measurement.
- Circular Paper Discs keep samples from sticking to baseplates or heads during testing.
- Large Display Digital Stopwatch measures gyration speed during verification.
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