Unpaved runway strength correlation

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The proposed work aims to catalogue the relationship between the values reported via the Udarnik U-1 DropHammer and the Boeing High Load Cone Penetrometer tests. The successfully defined relationship will allowcontinued use of the Udarnik U-1 test while safely and accurately reporting unpaved runway strength in termsof California Bearing Ratio (CBR). The principle underlying challenge is the high variability in unpavedrunway materials used across the globe. The relationship between reported values may vary across differentmaterials, moisture contents, and compaction levels.To resolve the problem, various representative runway material samples will be documented and selected fortesting. Samples will be prepared in lab at various moisture contents and compaction levels for robustness ofsolution. Testing will be conducted using both the Udarnik U-1 Drop Hammer and the Boeing High Load ConePenetrometer, and the results will be analyzed for significance. The project methodology will provide a robustsolution for the relationship between the two test methods. This will allow application of the solution to a widevariety of runways and will therefore allow access to broader markets.Bi-weekly meetings will be held with representatives from both the research group and company personnel.Meeting topics may include progress updates, trouble shooting, feedback, etc. Deliverables shall include: asummary of current practices including test methods, runway construction and maintenance standards, materialstandards, and sample preparation standards; summary of experimental design; summary of results; summaryof relationship/model; and the final project Technical Report.Bombardier will provide to the university the use of both pieces of testing apparatus for the purposes ofconducting the research. Further, company personnel will be involved in bi-weekly meetings to monitor projectprogress and provide clarifications and input as needed.