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Please use this identifier to cite or link to this item: http://hdl.handle.net/10481/48432

Title: Interfacial characterization of heavy naphthenic bitumen for paving
Authors: Guerrero Barba, Felipe II
Direction: Rodríguez Valverde, Miguel Ángel
Cabrerizo Vílchez, Miguel Ángel
Collaborator: Universidad de Granada. Programa Oficial de Doctorado en: Física y Ciencias del Espacio
Issue Date: 2017
Submitted Date: 5-Jan-2017
Abstract: In chapter 1 we describe the instruments and methods used in this thesis. The aim of chapter 2 is the evaluation of the interfacial energy of heavy naphthenic bitumen in water at different values of pH and at room temperature. We propose a new methodology based on the measurement of the bitumen surface tension at high temperature, the equilibrium contact angle of buffered water on heat-casted films of bitumen and the estimation of the bitumen-water interfacial energy at room temperature using the Young equation. Our strategy enables us to avoid the use of approaches for surface energy calculation, such as the polar-disperse components of surface tension and the equation of state. In chapter 3 we intend to understand the behavior of naphthenic bitumen in water due to the activation of endogenous surfactants. We measured the bitumen-water interfacial tension at high temperature for different pH values and the "underwater" wettability of bitumen films. We also examined the effect of calcium ions on the interfacial tension and electrical state of bitumen. Finally, in chapter 4, we examined the physicochemical interactions between bitumen and aggregate during bitumen spreading at high temperature. We monitored the spreading of sessile drops of liquid bitumen deposited on polished limestone aggregates. We selected limestone sheets due to their importance in road paving and because calcite is very chemically active. We studied two bitumens with different interfacial, rheological, and chemical properties: naphthenic bitumen and asphaltic bitumen.
Sponsorship: Tesis Univ. Granada. Programa Oficial de Doctorado en: Física y Ciencias del Espacio
This thesis was supported by Ministerio Español de Economía y Competitividad (project MAT2014- 60615-R) and the Junta de Andalucía (project P12-FQM-1443).
F. Guerrero and his supervisors are grateful to the Biocolloid and Fluid Physics Group (ref. PAI-FQM115) of the University of Granada (Spain).
Publisher: Universidad de Granada
Keywords: Materiales bituminosos
Pavimentos bituminosos
Tensión superficial
Betún nafténico
UDC: 544
URI: http://hdl.handle.net/10481/48432
ISBN: 9788491635581
Rights : Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License
Citation: Guerrero Barba, F. Interfacial characterization of heavy naphthenic bitumen for paving. Granada: Universidad de Granada, 2017. [http://hdl.handle.net/10481/48432]
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