| Autor: |
Nowell, D. V., Powell, M. W. |
| Zdroj: |
Journal of Thermal Analysis and Calorimetry; September 1991, Vol. 37 Issue: 9 p2109-2124, 16p |
| Abstrakt: |
Chemical factors influencing bitumen-mineral adhesion have been examined by heat-of-immersion calorimetry. Two chosen minerals (quartz and calcite) and bitumen derived from Venezuelan and Middle East crude oils were characterised and the energy released by the bitumen-mineral interaction measured. Heat-of-immersion data are correlated with the concentration of heteroatomic species present in the bitumen and the structure of the mineral surfaces. Bitumen-quartz bonding is promoted by the presence of basic species in the bitumen and bitumen-calcite adhesion is favoured by the presence of acidic groups. A mechanism is proposed to account for the observed bond energies. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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