Full Depth Pavement Reclamation: Performance Assessment and Recommendations for Best Performance
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2020-09-01
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Edition:Final; August 2018-September 2020
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Abstract:This study investigates variability in the FDR base layer from the results of field and laboratory data of a reconstruction project. The results of the UCS tests show 7-day strengths are more stable with less variability across the sites than those of 3 days. Deflection data analysis results also show that the FDR layer provides more uniform stiffness as curing continues. Mechanistic analysis results indicate both the FDR base thickness and strength have a significant influence on the predicted pavement responses. Some of the pertinent conclusions from this study are: -- It is recommended that GDOT specifications be modified to include pre-mix in specification 315 section 3.03; -- A stricter control on the cement spread rate and the treatment depth is necessary to reduce variability in strength; -- Deflection testing with either LWD or FWD should be performed to monitor the stiffness characteristics (or strength gains) of the FDR base during construction; and, -- It is recommended that GDOT develop CTA fatigue cracking model calibration coefficients to model FDR base pavement sections using Pavement ME Design (PMED) software.
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