United States Department of Transportation
i
0-6687 : minimize premature distresses in continuously reinforced concrete pavement : [project summary].
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2013-08-01
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[PDF-79.36 KB]
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Abstract:The performance of continuously reinforced concrete
pavement (CRCP) has been quite satisfactory in Texas,
providing one of the most cost-effective pavement systems
for the Texas Department of Transportation (TxDOT).
However, distresses do occur occasionally. Once distresses
occur, they need to be repaired in a timely manner, and the
repair cost is relatively high. Extensive field performance
evaluations of CRCP in Texas conducted under the TxDOT
rigid pavement database project indicate that the majority
of the distresses are not necessarily due to the deficiencies
in the structural capacity of CRCP. Rather, the majority of
distresses are due to imperfections in materials and
construction quality. These distresses normally occur
earlier than structural distresses caused by fatigue failure
of concrete. Accordingly, they are termed premature
distresses (PMDs). Traditional ways of strengthening the
pavement system, such as the use of increased concrete
slab thickness, do not reduce the frequency of PMDs.
The repair cost of CRCP is higher than that of jointed
concrete pavement (CPCD), and there is little difference in
the repair cost between PMDs and normal structural
failures. Also, repair of CRCP distress takes longer to
complete than CPCD repairs, causing traffic delays and
increasing user cost. It is desirable to identify the
mechanisms of PMDs and develop means to prevent or
minimize the occurrence of PMDs.
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