United States Department of Transportation
i
FDR Stabilizer Selection Using Simple Soil Tests
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2022-09-01
[PDF-1.13 MB]
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Corporate Contributors:Rutgers University. Center for Advanced Infrastructure and Transportation ; United States. Department of Transportation. University Transportation Centers (UTC) Program ; United States. Department of Transportation. Federal Highway Administration ; United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology
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Edition:Final Report, 2/1/2020–9/1/2022
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Abstract:Most local agencies that use full-depth reclamation (FDR) choose the stabilizer to be used by selecting a vendor rather than performing test on the pavement materials. Most of the methods available for selecting the technique or additive to be used rely on a sieve test and the plastic index (PI). The PI is not sensitive at the low values found in materials like the glacial tills common across the northeast. However the Sand Equivalent (SE) is more sensitive in those materials and can be performed quickly. Five soils were tested to see if the SE with a sieve test could be used to discern if asphalt emulsion would be a good stabilizer additive for FDR. A proposed new matrix for which stabilizer technique or additive was proposed. Three sets of pavement materials (surface asphalt concrete and base gravels) were then tested to confirm the proposed stabilizer selection matrix. The results confirmed that the SE test may be a good alternative for local agencies trying to decide which stabilizer to use.
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