Structural enhancement of railroad track structures using asphalt underlayment
Coleman, David M.
Miscellaneous PaperAbstract: Water intrusion into low strength and/or swelling subgrade soils under railroad track results in the need for almost continuous maintenance as well as operational problems for railroad traffic. In recent years many techniques for stabilizing unstable track structures have been developed. One of these techniques is the use of hot-mix asphaltic concrete as a structural layer in the track structure. The use of a hot-mix asphalt structural layer in the track structure combined with the provision for adequate drainage of water away from the track has been shown to reduce or eliminate water intrusion into the subgrade. This helps to reduce maintenance requirements and improve operating conditions. This report documents the design and construction of an asphalt underlayment in the railroad track at Red River Army Depot (RRAD), Texarkana, Texas. Also included is a brief review of the use of hot-mix asphaltic concrete in railroad track, a benefit-cost analysis, and a discussion of the factors that should be considered contemplating when considering track rehabilitation using the underlayment technique.
Geotechnical Laboratory (U.S.)Engineer Research and Development Center (U.S.)
Asphaltic concrete paving; Asphalt concrete; Asphalt pavement; Asphaltic concrete underlayment; Railroads; Railroad track maintenance; Railroad track rehabilitation; Railroad trackbed stabilization
Miscellaneous paper (U.S. Army Engineer Waterways Experiment Station) ; GL-86-21.
Approved for public release; distribution is unlimited.
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