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- W801844562 abstract "Much discussion has been raised about mixture tenderness with some Superpave mixtures during field compaction. These mixtures appeared tender during placement even though they conformed to requirements. The tenderness is normally noticed as the rollers move on the hot mat in the mid range of cooling temperatures, 240-190 deg F (116-88 deg C). While some projects using Superpave mixtures with Performance Graded (PG) binders like PG 64-28, PG 64-34, and PG 58-40 have exhibited this problem, other projects with the same binder grades have been successfully placed and are performing well. The PG asphalt binder viscosity optimal for achieving compaction may be influenced more by the base asphalt than the increased stiffness provided by the modification. The rheology imparted by the type of modification is the key. If it is suspected that the compaction temperatures are contributing to the tenderness, lower temperatures should be considered. The total fluids content plays an important role on the compactibility of Superpave mixtures, based on possible increased binder contents and the higher acceptable levels of fines. The lift thickness, in addition to the asphalt binder and aggregate material interaction, plays an equally important role in achieving adequate field density. The thicker the lift, the easier it becomes to achieve pavement density in the field." @default.
- W801844562 created "2016-06-24" @default.
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- W801844562 date "1998-02-01" @default.
- W801844562 modified "2023-09-27" @default.
- W801844562 title "A MATERIAL ENGINEER'S PERSPECTIVE: FIELD COMPACTION OF SUPERPAVE MIXTURES" @default.
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