RUBBERIZED ASPHALT COATINGS FOR BALLASTED TRACK AND RELATED SYSTEMS AND METHODS
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United States of America Patent
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Issued Date -
Nov 10, 2022
app pub date -
Apr 27, 2022
filing date -
May 10, 2021
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Abstract
An example method for forming a track system includes: providing track ties configured to support rails; providing stone ballast configured to support the track ties; and disposing a layer of rubberized asphalt coating between the ballast and the track ties, the rubberized asphalt coating having a bituminous binder, crumb rubber particles, and small gradation stone aggregate; wherein resiliency of the layer of rubberized asphalt coating permits particles of the ballast in direct contact with the layer of rubberized asphalt coating to move elastically relative to the bottom of the tie and to each other while inhibiting abrasion of adjacent ones of the particles of the ballast against each other and against the bottom of the track ties.
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