United States Department of Transportation
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Structural Overlay Strategies for Jointed Concrete Pavements. Volume III: Performance, Evaluation and Analysis of Thin Bonded Concrete Overlays
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1990-06-01
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[PDF-3.35 MB]
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Abstract:A major field study and evaluation has been conducted into the effectiveness of three structural overlay types for portland cement concrete (PCC) pavements. These include sawing and sealing asphalt concrete (AC) overlays of PCC pavements, cracking and seating PCC pavements prior to AC overlay, and constructing a thin bonded PCC overlay on top of the existing PCC pavement. Condition surveys, deflection testing, and roughness measurements were performed on a total of 55 sections. The performance of these sections was evaluated and the effectiveness of each overlay type analyzed. Based on the field data, guidelines were developed for the use of structural overlays. In addition, the results of this study were used to revise and enhance the EXPEAR rehabilitation advisory system. This volume documents the field evaluation of 16 sections of thin bonded concrete overlay projects at 10 locations in 6 States. Compared to other overlay techniques, a concrete overlay has the potential for an extended service life, increased structural capacity, and lower life cycle costs. Field data items collected and analyzed includes pavement distress, deflections, layer and material samplings, drainage, roughness, serviceability, and overlay debonding. Other information, such as design and construction information, preoverlay condition, and traffic volumes, were collected from the participating State highway agencies. All of this information was closely examined to determine and evaluate the relative performance levels of each concrete overlay. Based on the findings from the performance evaluation, revised design and construction guidelines were developed.
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