YIELD STRESS DETERMINATION OF ASPHALT EMULSIONS |
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| Authors: | Max Hetzer Kyle Frederic Christopher D. Abadie |
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| Affiliation: | 1. Department of Chemical and Biomolecular Engineering , Tulane University , New Orleans, Louisiana, USA;2. Lousiana Transportation Research Center , Baton Rouge, Louisiana, USA |
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| Abstract: | The yield stress of asphalt emulsions was investigated as a potential quality control parameter. Viscometric data were determined using concentric cylinder, parallel plate, and cone and plate geometries. The use of a novel slotted-plate technique was investigated to determine the yield stress of asphalt emulsions in a direct way, that is to say, without extrapolation. The Saybolt viscosity was determined following the AASHTO T 72-97 standard procedure. It was found that the slotted-plate technique produced reproducible and consistent results, which were far superior to those obtained by rotational rheometer techniques. The yield stress of the emulsions appears to be a more accurate measure of the performance specification for asphalt emulsions than the Saybolt data. |
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| Keywords: | Asphalt emulsions Slotted-plate technique Yield stress |
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