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Experimental and numerical analysis of asphalt flow in a slump test
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Materials.ORCID iD: 0000-0001-9504-2008
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Materials.
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Materials. EMPA–Swiss Federal Laboratories for Materials Science and Technology, Duebendorf, Switzerland.
2019 (English)In: International Journal on Road Materials and Pavement Design, ISSN 1468-0629, E-ISSN 2164-7402, Vol. 20, p. S446-S461Article in journal (Refereed) Published
Abstract [en]

The mechanical behaviour of uncompacted asphalt mixtures is still not well understood,threatening directly to the pavement practices such as control of mixture’s workability andsegregation. This situation may become even worse due to the gradually increasing complexityand advances in paving materials and technologies. This study adopts a slump flow testbased on concrete technology and a Discrete Element (DE)-based numerical tool to investigatethe mechanical behaviour of uncompacted asphalt mixture from a microstructural point ofview, particularly focusing on the bituminous binder effects. The combined experimental andnumerical analysis indicates that bitumen distinctly influences the contact interactions withinthe mixture and thus its macroscopic flow, which can be physically interpreted as a combinedeffect of lubricated friction and bonding force. Additional case studies demonstrate that the DEmodel is capable of simulating the flow response of asphalt mixtures under changed particlecontact conditions and driven force.

Place, publisher, year, edition, pages
Taylor & Francis, 2019. Vol. 20, p. S446-S461
Keywords [en]
Asphalt mixture; slump test; discrete element method; large displacement
National Category
Infrastructure Engineering
Research subject
Civil and Architectural Engineering
Identifiers
URN: urn:nbn:se:kth:diva-246052DOI: 10.1080/14680629.2019.1587495ISI: 000468539800028Scopus ID: 2-s2.0-85062715193OAI: oai:DiVA.org:kth-246052DiVA, id: diva2:1295536
Funder
Swedish Research Council Formas, 2012-1349
Note

QC 20190319

Available from: 2019-03-12 Created: 2019-03-12 Last updated: 2019-06-24Bibliographically approved

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Chen, FengPartl, Manfred

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