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Design of Large Stone Asphalt Mixes to Minimize Rutting
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    Report No. 9
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  • Abstract:
    Rutting of heavy duty asphalt pavements has been increasingly experienced in recent years. This phenomenon is primarily resulting from high tire pressures and increased wheel loads. The design of Hot Mix Asphalt (HMA) which served reasonably well in the past needs to be reexamined to withstand the increased stresses. Various asphalt additives are being promoted to increase the stability of HMA pavements at high temperatures. However, most asphalt technologists believe that fundamental changes in the aggregate component of the HMA (such as, size, shape, texture and gradation) must be made first. There is a general agreement that the use of large size stone in the binder and base courses will minimize or eliminate the rutting of heavy duty asphalt pavement. A series of compaction tests were run using 4-inch and 6-inch diameter specimens of wearing and binder mixes. Study can be down loaded in two pdf files from web front page.

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