The Superpave gyratory compactor produces asphalt mix specimens to densities achieved under actual pavement climate and loading conditions. With its 150 mm diameter mold, it is capable of accommodating large aggregate mixtures. A key feature is its ability to estimate specimen density at any point during the laboratory compaction process. It is the key laboratory device used in Superpave mix design.
A Superpave gyratory compactor consists of a rigid reaction frame, loading system, and specimen height measurement and recordation. It compacts asphalt mixture specimens at a constant pressure of 600 kPa. The mixture is compacted by a gyratory kneading action using a compaction angle of 1.25 degrees and operating at 30 rpm.
By knowing the mass of the specimen being compacted and the height of the specimen, specimen density can be estimated during the compaction process. This is accomplished by dividing the specimen mass by the specimen volume. To estimate volume, the specimen is assumed at any point to be a smooth-sided cylinder of 150 mm in diameter and measured height.
A Superpave gyratory compactor consists of a rigid reaction frame, loading system, and specimen height measurement and recordation. It compacts asphalt mixture specimens at a constant pressure of 600 kPa. The mixture is compacted by a gyratory kneading action using a compaction angle of 1.25 degrees and operating at 30 rpm.
By knowing the mass of the specimen being compacted and the height of the specimen, specimen density can be estimated during the compaction process. This is accomplished by dividing the specimen mass by the specimen volume. To estimate volume, the specimen is assumed at any point to be a smooth-sided cylinder of 150 mm in diameter and measured height.
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