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- W623541936 abstract "Conventional dense graded asphalt has been used as a structural road pavement material in New South Wales for many years and has performed satisfactorily under the prevailing traffic conditions. In recent years, however, the effective performance of dense graded asphalt has been severely reduced in some areas due to higher than anticipated increases in traffic volume and more particularly, the percentage of heavy commercial vehicles and increased tyre pressures. In 1984 a number of premature asphalt failures occurred on the New England Highway, in the Newcastle Division. An investigation of these failures showed the asphalt was starting to rut in less than one year after placement. Furthermore, the rutting was occurring in the asphalt and not in the underlying base. To overcome the problem a special high strength asphalt mix design was developed using the Gyratory Testing Machine. The resulting asphalt consisted of a combination of increased coarse aggregate and mineral filler content to improve the skeletal structure and load bearing capacity of the mix, together with the addition of a small percentage of Gilsonite to the bitumen to both stiffen, and improve the temperature susceptibility, of the binder. This type of mix is only suitable for use on pavements which have a low deflection and low curvature. This paper describes the development of the high strength asphalt mix design and reports details of the field performance of the mix to date. (Author/TRRL)" @default.
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- W623541936 date "1990-01-01" @default.
- W623541936 modified "2023-09-23" @default.
- W623541936 title "DEVELOPMENT OF HIGH STRENGTH ASPHALT MIXES . 15TH ARRB CONFERENCE, DARWIN, NORTHERN TERRITORY, 26-31 AUGUST 1990; PROCEEDINGS PARTS 1 TO 7" @default.
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