Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Paving Asphalts: Asphalt-Aggregate Interactions and Asphalt Intermolecular Interactions
The isolation, identification and quantitative measurement of the functional group types in asphalt that are strongly adsorbed at the asphalt-aggregate interface are described. A 4 x 4 matrix of four different asphalts and four different aggregates was used in the study. The relative affinity of the various functional types for the aggregate surfaces is assessed. Association-dissociation interactions of asphalt molecules were studied by microcalorimetry. Methods for calculating the association rate constants, the number of molecular units in an associated complex, and the enthalpy and energy of activation of the association reactions are described. Experimentally derived values are cited for selected asphalts. Relationships between molecular interactions and micelle formation in asphalts are proposed. The heats of immersion of a variety of asphalt-aggregate systems were determined. The energy released when aggregate is immersed in asphalt is proposed as indicative of the strength of the asphalt-aggregate bond. In the study, both experimental asphalts and conventional paving asphalts were evaluated. A variety of aggregates including those produced from byproducts and wastes were also tested.
Paving Asphalts: Asphalt-Aggregate Interactions and Asphalt Intermolecular Interactions
The isolation, identification and quantitative measurement of the functional group types in asphalt that are strongly adsorbed at the asphalt-aggregate interface are described. A 4 x 4 matrix of four different asphalts and four different aggregates was used in the study. The relative affinity of the various functional types for the aggregate surfaces is assessed. Association-dissociation interactions of asphalt molecules were studied by microcalorimetry. Methods for calculating the association rate constants, the number of molecular units in an associated complex, and the enthalpy and energy of activation of the association reactions are described. Experimentally derived values are cited for selected asphalts. Relationships between molecular interactions and micelle formation in asphalts are proposed. The heats of immersion of a variety of asphalt-aggregate systems were determined. The energy released when aggregate is immersed in asphalt is proposed as indicative of the strength of the asphalt-aggregate bond. In the study, both experimental asphalts and conventional paving asphalts were evaluated. A variety of aggregates including those produced from byproducts and wastes were also tested.
Paving Asphalts: Asphalt-Aggregate Interactions and Asphalt Intermolecular Interactions
J. C. Petersen (Autor:in) / E. K. Ensley (Autor:in) / H. Plancher (Autor:in) / W. E. Haines (Autor:in)
1976
52 pages
Report
Keine Angabe
Englisch
Construction Equipment, Materials, & Supplies , Asphalts , Aggregates , Physical properties , Chemical properties , Chemical composition , Concentration(Composition) , Chemical analysis , Numerical analysis , Dipoles , Reaction kinetics , Activation energy , Molecular structure , Molecule molecule interactions
Asphalts, asphalt mixtures and additives
| TIBKAT | 1982
| Engineering Index Backfile | 1957