Get Manual Of Operation And Instruction Model 5850 Gyratory Compactor

Using gyratory compactor to measure mechanical stability of asphalt mixtures.

The Superpave mix design procedure features the Superpave gyratory compactor (SGC) for compacting specimens of hot mix asphalt.

The standards specify the method for compaction of cylindrical specimens of bituminous mixtures using a gyratory compactor, Such compaction is achieved by combining a rotary shearing action and a vertical force applied by a mechanical head.

Standard mix design procedures were differentiated on their method of compaction, which is assumed to simulate field compaction. With the Marshall design methods, specimens are prepared by impact compaction, while in the superpave design method, specimens are fabricated by gyrations.

Key moments Bring mixture to compaction temperature immediatley prior to molding. ... Place base plate in mold. ... Place paper disk in mold. ... Avoid segregation when placing mix into the mold. ... Place mixture into mold in one lift. ... Level mixture. ... Verify temperature is within compaction range.

Superpave Gyratory Compactors Evaluated The primary objective of this research effort was to calibrate SGCs to an effective internal angle of 1.16± 0.02° with the DAV, and then make comparisons of specimens compacted with the different SGCs. Comparisons were made on the basis of air void contents.

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. Mold Assemblies are sold separately.

The compactor tilts the specimen molds at an internal angle of 1.16 ± 0.02° (20.2 ± 0.35 mrad) and gyrates specimen molds at a rate or 30.0 ± 0.5 gyrations per minute throughout compaction.