A study on dielectric response of bitumen in the low-frequency range
2015 (English)In: International Journal on Road Materials and Pavement Design, ISSN 1468-0629, Vol. 16, 153-169 p.Article in journal (Refereed) Published
From the current state of literature, the dielectric property of bitumen has not been understood extensively, nor its relation with other properties such as polarity and rheology. In this study, dielectric spectroscopy measurement in a low-frequency range (10−2–106 Hz) was performed on both pure bitumen in different grades and wax-modified bitumen (WMB). From the performed tests we found the following: (i) the dielectric response of base bitumen is strongly temperature and frequency dependent, which is also highly linked to the rheology of the system. (ii) No remarkable differences in the dielectric constant (Formula presented.) among different grades of bitumen from the same crude oil source can be seen. (iii) Regular changes of dielectric loss tangent (tan δ) among the different grades of bitumen can be observed, which can be a good indicator for the linkage between the dielectric and rheological responses. In addition, it can also be perceived that the dielectric spectroscopy may have the potential to become a new approach for the multi-scale characterisation of road infrastructure materials.
Place, publisher, year, edition, pages
Taylor & Francis, 2015. Vol. 16, 153-169 p.
Dielectric Spectroscopy, Bitumen, Electrical Polarization, Rheology
Research subject Civil and Architectural Engineering
IdentifiersURN: urn:nbn:se:kth:diva-163549DOI: 10.1080/14680629.2015.1029682ISI: 000355122400010ScopusID: 2-s2.0-84929943889OAI: oai:DiVA.org:kth-163549DiVA: diva2:800778
6th Conference of the European Asphalt Technology Association (EATA),Stockholm, Sweden, 15-17 June 2015.
QC 20150616. Updated from accepted to published.2015-04-072015-04-072015-06-16Bibliographically approved