United States Department of Transportation
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TRIS Online Accession Number:00978485
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Edition:Final Report
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Abstract:In 1997, a cold inplace recycle (CIR) project using fly ash additive in one half, and a lime slurry additive in the other half, was built on US-283 in Ford County, Kansas. Test sections were established and monitored through periodic inspections, crack surveys, and FWD measurements for approximately 5 to 6 years. The lime slurry section contained less cracking during the early years of the monitoring period. Toward the end of the 5 year period both sections contained approximately the same amount of cracking. Wheel path rutting was not a major distress using both additives. A laboratory study was conducted on field cores from the project, and also on lab molded samples using various additives. Some of the tests were permeability, modified T283, resilient modulus, asphalt pavement analyzer and density measurements. The laboratory data showed that both additives improved the engineering mix properties with the fly ash showing the best results. Cost data was also collected from a summary of several CIR projects using the two different additives, and it was determined that the lime slurry was approximately 25 percent more expensive. Based on the field surveys, it is expected that the life of the lime slurry section will be at least 1 to 2 years longer than the fly ash section. The report concluded that the life cycle cost of the lime slurry section is about equal to the fly ash section.
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