Continuous real time measurement of pavement quality during construction.
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2010-12-01
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Abstract:Intelligent Compaction has been investigated as a means of improving the quality of asphalt pavements during their
construction. The long term performance of an asphalt pavement is directly related to its load bearing capability and
is determined by the stiffness achieved during the construction process. Early deterioration of pavements due to
rutting, fatigue cracking and other types of distresses can be traced to inadequate stiffness. While dependence of
pavement performance on stiffness is well known, this parameter is rarely measured during construction of the
pavements. Instead, current quality control in the field during the construction of asphalt pavements focuses on the
measurement of density of the finished pavement at specific locations.
In this research project, the use of OU’s Intelligent Asphalt Compaction Analyzer (IACA) in determining the modulus
of the entire pavement under construction is demonstrated. The ability to continuously monitor the modulus of the
pavement will help identify and address improper compaction during construction. Low stiffness resulting from
inadequate compaction can be addressed while the asphalt mat is still hot and pliable thereby leading to longer
lasting roads. The IACA-based approach for estimating the stiffness of the pavement during construction is shown
to be a cost effective technique for assessing the quality, and it provides a means to improve the overall quality of
asphalt pavements during construction.
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