United States Department of Transportation
i
An overview of joint deterioration in concrete pavement : mechanisms, solution properties, and sealers.
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2013
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[PDF-16.47 MB]
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Abstract:Concrete pavements represent a large portion of the transportation
infrastructure. While the vast majority of concrete pavements
provide excellent long-term performance, a portion of these
pavements have recently shown premature joint deterioration.
Substantial interest has developed in understanding why premature
joint deterioration is being observed in jointed portland
cement concrete pavements (PCCP). While some have attributed
this damage to insufficient air void systems, poor mixture design,
or chemical reaction between the salt and the paste, it is the
hypothesis of this work that a component of this damage can also
be attributed to fluid absorption at the joints.
This report begins by discussing the importance of the level of
concrete saturation on freeze-thaw damage. It was determined
that damage can occur in samples having a degree of saturation
higher than some critical value (approximately 86%) after even
one freezing cycle. When deicing salts are used, the freezing
temperature is depressed; however, additional damage is observed
as compared to just water. Additional damage appears to occur on
thawing for systems with higher salt concentrations, presumably
due to the phase change in the hydrohalite.
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