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A study on dielectric response of bitumen in the low-frequency range
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering.ORCID iD: 0000-0001-9504-2008
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.ORCID iD: 0000-0003-0759-4406
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Structural Engineering and Bridges.ORCID iD: 0000-0003-3968-6778
KTH, School of Architecture and the Built Environment (ABE), Transport Science, Highway and Railway Engineering.ORCID iD: 0000-0003-0889-6078
2015 (English)In: International Journal on Road Materials and Pavement Design, ISSN 1468-0629, E-ISSN 2164-7402, Vol. 16, 153-169 p.Article in journal (Refereed) Published
Abstract [en]

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.
Keyword [en]
Dielectric Spectroscopy, Bitumen, Electrical Polarization, Rheology
National Category
Civil Engineering
Research subject
Civil and Architectural Engineering
Identifiers
URN: urn:nbn:se:kth:diva-163549DOI: 10.1080/14680629.2015.1029682ISI: 000355122400010Scopus ID: 2-s2.0-84929943889OAI: oai:DiVA.org:kth-163549DiVA: diva2:800778
Conference
6th Conference of the European Asphalt Technology Association (EATA),Stockholm, Sweden, 15-17 June 2015.
Note

QC 20150616. Updated from accepted to published.

Available from: 2015-04-07 Created: 2015-04-07 Last updated: 2017-12-04Bibliographically approved
In thesis
1. The Future of Smart Road Infrastructure: A Case Study for the eRoad
Open this publication in new window or tab >>The Future of Smart Road Infrastructure: A Case Study for the eRoad
2015 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

In the future, physical roads will not only serve for the mobility of the vehicles but also have the capability of enabling different smart functionalities, such as car2road communication, energy harvesting or dynamic charging of electrical vehicles. To ensure the sustainability of these advances, the environmental, economic and social costs for the road infrastructure itself should not offset its possible advances. Additionally, the road infrastructure itself may also need to be modified to ensure the long-term performance of the new functionalities.

This licentiate mainly focused on the electrified road (called ‘eRoad’) infrastructure, which can be a representative case of the future smart road. Specifically, a historical overview of the technology development towards the electrification of road transportation sector is presented, along with an overview of prospective technologies for implementing an eRoad’s charging infrastructure. Of these, the Inductive Power Transfer (IPT) charging technology is examined in further details.

The potential knowledge gaps for a successful integration of IPT charging technology within actual road infrastructure are discussed. Some general recommendations are given throughout the licentiate thesis, regarding such as the appropriate design of eRoad structure and right selection of road materials, the cost-effective maintenance operations in the long term, and the eRoad’s role in the overall life cycle environmental impacts in the electrification of road transportation sector. This licentiate provides the basis for further focus in this field and outlines the potential research areas that need further investigation to ensure the future of systemically optimized smart road infrastructure. 

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2015. vii, 17 p.
Series
TRITA-BKN. Bulletin, ISSN 1103-4270 ; 131
National Category
Civil Engineering
Research subject
Civil and Architectural Engineering
Identifiers
urn:nbn:se:kth:diva-163544 (URN)
Presentation
2015-04-21, B2, Brinellvägen 23, Stockholm, 09:00 (English)
Opponent
Supervisors
Note

QC 20150410

Available from: 2015-04-10 Created: 2015-04-07 Last updated: 2015-05-28Bibliographically approved
2. Sustainable Implementation of Electrified Roads: Structural and Material Analyses
Open this publication in new window or tab >>Sustainable Implementation of Electrified Roads: Structural and Material Analyses
2016 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Given the promise of the Inductive Power Transfer (IPT) technology for eRoad applications, the potential challenges for a successful integration of dynamic IPT technology into the physical road structure are explored extensively in this research work. The Finite Element Method (FEM) is selected for studying the structural performance of an eRoad under operational conditions. In this, an energy-based finite strain constitutive model for asphalt materials is developed and calibrated, to enable the detailed investigation of the structural response and optimization of the considered eRoad. In the context of enabling both dynamic charging and autonomous driving for future electric vehicles, the influences to the pavement (rutting) performance by the changed vehicle behaviour are investigated as well. Moreover, to study the effect on the IPT system by the integration, the potential power loss caused within eRoad pavement materials is further examined by a combined analytic and experimental analysis. The direct research goal of this Thesis is therefore to enhance the possibility of a sustainable implementation of the eRoad solutions into the real society. At the same time, it aims to demonstrate that the road structure itself is an important part of smart infrastructure systems that can either become a bottleneck or a vessel of opportunities, supporting the successful integration of these complex systems.

Abstract [sv]

Givet de förutsättningar som induktiv energiöverföring (IPT Inductive Power Transfer) har för eRoad applikationerna, utforskas möjligheterna för en framgångsrik integration av dynamisk IPT i den fysiska vägkonstruktionen på en djupgående nivå i detta forskningsarbete. Speciellt har finita elementmetoden använts för att studera det strukturella beteendet hos en e-väg under driftsmässiga förhållanden. Inom detta har en energibaserad konstitutiv model för stora töjningar utvecklats och kalibrerats för att möjliggöra detaljerade undersökningar av strukturell respons och optimering av de föreslagna e-vägarna. I samband med att möjliggöra både dynamisk laddning och autonom körning för framtida elektriska fordon, har beläggningars (spårbildnings)egenskaper studerats utifrån de laddande fordonen beteende. Dessutom för att studera effekten av IPT-systemet har den potentiella energiförlusten inom e-vägars beläggningsmaterial undersökts genom en kombinerad analytisk och experimentell undersökning. Som sådant är det direkta forskningsmålet med denna avhandling att utöka möjligheterna för en hållbar implementering av eRoad systemet inom det verkliga samhället. Samtidigt är målet att visa att vägkonstruktionen i sig själv är en viktig del av det smarta infrastruktursystemet som antingen kan bli en flaskhals eller en bärare av möjligheter, stödjande en framgångsrik implementering av dessa komplexa system.

Place, publisher, year, edition, pages
KTH Royal Institute of Technology, 2016. 70 p.
Series
TRITA-BKN. Bulletin, ISSN 1103-4270 ; 144
Keyword
Electrified road; Structural performance; Constitutive modelling; Asphalt; Dielectric loss., Elektrifierade vägar; Strukturellt beteende; Konstruktivt modellerande; Asfalt; Dielektrisk förlust.
National Category
Infrastructure Engineering
Research subject
Civil and Architectural Engineering; Transport Science
Identifiers
urn:nbn:se:kth:diva-195669 (URN)978-91-7729-193-0 (ISBN)
Public defence
2016-11-25, sal A123, Osquars backe 5, Stockholm, 10:00 (English)
Opponent
Supervisors
Note

QC 20161108

Available from: 2016-11-08 Created: 2016-11-07 Last updated: 2016-11-11Bibliographically approved

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Chen, FengTaylor, NathanielKringos, NicoleBirgisson, Björn

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