RAILS RIDING ON ASPHALT IN THE UNITED STATES AND ELSEWHERE

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Manuela
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RAILS RIDING ON ASPHALT IN THE UNITED STATES AND ELSEWHERE

Mensagem por Manuela » 05 Set 2016, 13:55

Autor: Jerry G. Rose, P.E.

The continued growth in traffic
volumes, revenue ton-miles, and wheel
loadings on the United States freight
railroads has prompted research to
evaluate new technologies to provide
higher quality and longer lasting track
and support structures. Similar studies
are on-going in several European and
Asian countries.
To meet this challenge, the railroad
companies and the asphalt paving
industry have developed designs and
applications for using hot mix asphalt
(HMA) to replace a portion of the
conventional granular material.
HMA is now being used in new
mainline tracks, yards, and terminals. It
is also being used for trackbed maintenance
and as a solution for instability
problems in existing trackbeds. These
trackbed solutions include installing a
layer of HMA during the rehabilitation
of turnouts, railroad crossings, bridge
approaches, defect detectors, hump
tracks, tunnel floors and approaches,
highway crossings, and loading facilities
where conventional trackbed
designs and support structures have not
performed satisfactorily.
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