Low frequency dielectric spectroscopy of bitumen binders as an indicator of adhesion potential to quartz aggregates using Portland cement
2016 (English)In: Materials and Structures, ISSN 1359-5997, E-ISSN 1871-6873, Vol. 49, no 4, 1327-1336 p.Article in journal (Refereed) PublishedText
The purpose of this investigation was to interpret the bitumen-aggregate adhesion based on the dielectric spectroscopic response of individual material components utilizing their dielectric constants, refractive indices and average tangent of the dielectric loss angle (average loss tangent). Dielectric spectroscopy of bitumen binders at room temperature was performed in the frequency range of 0.01-1000 Hz. Dielectric spectroscopy is an experimental method for characterizing the dielectric permittivity of a material as a function of frequency. Adhesion data has been determined using the Rolling bottle method. The results show that the magnitude of the average tangent of the dielectric loss angle (average loss tangent) depends on bitumen type. The average loss tangent in the frequency range 0.01-1 Hz is introduced as a potential indicator for predicting polarizability and, thereby, adhesion potential of bitumen binders to quartz aggregates when using Portland cement. In order to obtain acceptable adhesion of 70/100 penetration grade bitumen binders and quartz aggregates when using Portland cement, it is suggested that the binder have an average tan delta > 0.035 in the frequency range 0.01-1 Hz.
Place, publisher, year, edition, pages
Springer Netherlands, 2016. Vol. 49, no 4, 1327-1336 p.
Bitumen, Quartz, Portland cement, Dielectric constant, Permittivity, Average loss tangent, Polarizability
Other Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-186641DOI: 10.1617/s11527-015-0579-5ISI: 000373963700018ScopusID: 2-s2.0-84924559587OAI: oai:DiVA.org:kth-186641DiVA: diva2:932448
QC 201606012016-06-012016-05-132016-06-01Bibliographically approved