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原文传递 FIELD COMPACTION OF HARSH ASPHALT MIXTURES FOR 2,067 KPA (300 PSI) TIRE INFLATION PRESSURE

题名：	FIELD COMPACTION OF HARSH ASPHALT MIXTURES FOR 2,067 KPA (300 PSI) TIRE INFLATION PRESSURE
作者：	Geller-M; Murfee-J
关键词：	AIRPORT-RUNWAYS; ASPHALT-PAVEMENTS; RUTTING-; TIRE-INFLATION-PRESSURE; AIRCRAFT-TIRES; TAXIWAYS-; ASPHALTIC-MIXTURES; OVERLAY-COURSE; AIR-VOIDS-CONTENT; BINDER-CONTENT; PERFORMANCE-EVALUATIONS; GYRATORY-TESTING-MACHINE; DENSE-GRADED-AGGREGATE; HOT-MIX-ASPHALT
摘要：	The U.S. Air Force is concerned about the rapid and excessive rutting of asphalt pavements caused by the 2,067 to 2,756 kPa (300 to 400 psi) tire inflation pressures of modern fighter aircraft. Prior Defense Department research showed that these loads call for lower binder contents, and the appropriate binder amount can be determined by the Corps of Engineers' gyratory testing machine when operated at equivalent contact pressures. A taxiway was overlayed in late September at McEntire Air National Guard Base, South Carolina, by Rea Construction of West Columbia, South Carolina, to determine if harsh mixtures are constructible. The project required milling a 3.66-m (12-ft) wide keelway along the centerline of a 275-m (900-ft) by 15-m (50-ft) parallel taxiway and replacing it with 305 mm (12 in.) of drum mix, compacted in two 152-mm (6-in.) lifts. A nominal 102-mm (4-in.) overlay of the taxiway was placed in two sections, each 7.62 m (25 ft) wide by 275 m (900 ft) long. The allowable maximum compacted air voids was specified at 7%. The mean air voids of the compacted overlay, based on Rice theoretical density, was 6.8%, with some areas exceeding 7%. Periodic field inspections over the ensuing year showed no signs of surface material loss; nor was there any hint of rutting. This contract demonstrated that additional experience with harsh mixtures is all that is needed to construct asphalt mixes suitable for high tire inflation pressures.
总页数：	Transportation Research Record. 1995. (1513) pp39-46 (2 Phot., 2 Fig., 5 Tab., 2 Ref.)
报告类型：	科技报告