Magnetic Resonance Imaging of drying bitumen emulsions
| Autor: | Pamela Faure, M. Goavec, Stéphane Rodts, Philippe Coussot, V. Gaudefroy |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
medicine.diagnostic_test Analytical chemistry Magnetic resonance imaging 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Colloid and Surface Chemistry Density distribution Asphalt Free surface medicine 0210 nano-technology Concentration gradient |
| Zdroj: | Colloids and Surfaces A: Physicochemical and Engineering Aspects. 591:124512 |
| ISSN: | 0927-7757 |
| DOI: | 10.1016/j.colsurfa.2020.124512 |
| Popis: | From Magnetic Resonance Imaging (MRI) measurements allowing to distinguish separately the density distribution of the two phases of the system, we show that bitumen emulsions essentially dry homogeneously, with nevertheless a slight concentration gradient increasing towards the sample free surface exposed to air. Remarkably, despite the resulting large concentration of bitumen droplets formed around the free surface of the sample, the bitumen droplets do not coalesce before the very last stages of drying. In parallel the drying rate strongly and continuously decreases, which is attributed to the reduction of the hydraulic network connected to the sample free surface. |
| Databáze: | OpenAIRE |
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