Gyratory compactor

Details Gyratory compactor Gyratory compactor

1998-03-25

1999-08-17

Raevis, Robert

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

By loading of specimen

G01N 332

Patent

active

059396423

ABSTRACT:
An apparatus for compacting a material sample, such as paving material, including a cylindrical compaction mold and a mold support arranged to support one end of the mold. The mold support includes a turntable mounted for rotation about a rotational axis and a pair of mold-engaging members, such as rollers, extending from the turntable to engage the mold along its periphery and impart a gyratory motion to the mold as the turntable rotates. A mold retainer is also provided that includes a plurality of mold restraints spaced apart from one another about a central axis and arranged to engage the mold about the mold periphery at the end of the mold opposite the mold support. One of the mold restraints is attached to a movable latch that moves the mold restraint between an open position and a closed position. The open position locates the mold restraint out of engagement with the mold to allow the mold to slide into position inside the compactor apparatus. The closed position moves the mold restraint into contact with the mold and pushes the mold into a tilting position such that the axis of the mold intersects with the axis of the compression at the top of the mold. A compaction ram is mounted for axial movement into the mold along a predetermined axis of compression. As the ram applies compressive force, the turntable is rotated and the attached mold-engaging members impart a gyratory motion to the mold during compression.

REFERENCES:
patent: 2972249 (1961-02-01), McRae et al.
patent: 2980978 (1961-04-01), Marshall
patent: 3374665 (1968-03-01), Preston
patent: 3478572 (1969-11-01), McRae et al.
patent: 3781156 (1973-12-01), Moore
patent: 3883278 (1975-05-01), Hass
patent: 3907474 (1975-09-01), Blaser et al.
patent: 4063859 (1977-12-01), Halle et al.
patent: 4140744 (1979-02-01), Karas et al.
patent: 4196635 (1980-04-01), Zuber et al.
patent: 4942768 (1990-07-01), McRae
patent: 5036709 (1991-08-01), McRae
patent: 5046367 (1991-09-01), Iizuka
patent: 5275056 (1994-01-01), Hamilton et al.
patent: 5323655 (1994-06-01), Eagan et al.
patent: 5456118 (1995-10-01), Hines et al.
patent: 5606133 (1997-02-01), Hines et al.
Pine Instrument Company Brochure, Model AFGC125X Gyratory Compactor.
Pine Instrument Company Brochure, Portable Gyratory Compactor AFG1.
Industrial Process Controls Ltd. Technical Brief, Servopac-Gyratory Shear Compactor.
Interlaken Technology Corporation Brochure, ITC Gyratory Compactor.
Instron Corporation Brochure, Gyratory Compactor.
Test Quip, Inc. Brochure, Brovold Gyratory Compactor.
Rainhart Co. Catalog No. 654, p. 6, Apr. 1965.
Rainhart Series 650 Sample Extruder, Rainhart Co. Catalog No. 650, May 1968.
Forneys Catalog, p. 117, 1983.
Marui Catalog, p. 65, 1988.
Huber, Gerald A. et al., "Development of the Superpave Gyratory Compactor", The Superpave Center, The University of Texas at Austin, 1996.

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