United States Department of Transportation
i
Subsurface drainage for rehabilitation of PCC pavement : interim report - fourth year, August 2002.
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2002-08-01
[PDF-444.29 KB]
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Abstract:Many existing roadways are being enhanced due to the pressures of increased vehicular traffic. Some of
these improvements involve widening the present travel way to accommodate a turning lane and/or
additional travel lanes. This often necessitates removing unsatisfactory material in the existing shoulder
and replacing with more freely draining materials containing fewer fines in an attempt to reduce
differential movement between existing and new traveled ways, and to more nearly equate their load
carrying abilities. Many existing roadways consist of bituminous pavements and are underlain by 5.5 or 6
m (18 or 20 ft) wide Portland Cement Concrete (PCC) pavements, further complicating the transition
from existing to new pavement.
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