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Alternative Title:Joint Transportation Research Program Technical Report Series : Civil Engineering
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Edition:Final report.
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Abstract:Until the early 1990s, curling and warping of Portland cement concrete pavement did not concern
pavement engineers in many transportation agencies. Since beginning construction of the interstate system in the
United States in the late 1950s through the late 1980s, the performance of Portland cement concrete pavement has
been associated with properties of concrete as a pavement material. In those years developed standards and
design guidelines emphasized better concrete materials and construction control. At the time, combining curling
and loading stresses was quite controversial due to the nature of the load-carrying capacity of concrete pavement
and the occurrence of types of loads. Arguments developed that the types of loads (traffic and curling) rarely
occurred at the same time of day. The concrete pavement design principle did not include the effects of curling
and warping of concrete pavement as determining design factors in pavement performance.
This research project was initiated as a response from the INDOT Pavement Steering Committee related
to the joint spacing of Jointed Plain Concrete Pavement in Indiana. There was an initiative in the Committee to
reduce the joint spacing from 18 feet to 15 feet as a way to reduce premature concrete pavement deterioration.
There was an indication that some newly paved JPCP had transverse cracks even before the pavement section
was opened to traffic.
In this experimental study, several important conclusions were drawn from temperature analysis, stressstrain
analysis, and other data analysis. The analysis from this experimental study supports the decision by
INDOT to shorten the concrete pavement joint spacing to increase the performance of Jointed Plain Concrete
Pavement in Indiana.
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