L773:1468 0629 OR L773:2164 7402
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Experimental and numerical analysis of asphalt flow in a slump test
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- Chen, Feng, 1987- (author)
- KTH,Byggnadsmaterial
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- Jelagin, Denis (author)
- KTH,Byggnadsmaterial
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- Partl, Manfred (author)
- KTH,Byggnadsmaterial,EMPA–Swiss Federal Laboratories for Materials Science and Technology, Duebendorf, Switzerland
- (creator_code:org_t)
- 2019-03-08
- 2019
- English.
- In: International Journal on Road Materials and Pavement Design. - : Taylor & Francis. - 1468-0629 .- 2164-7402. ; 20, s. S446-S461
- Journal article (peer-reviewed)
Abstract
Subject headings
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- 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.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Samhällsbyggnadsteknik -- Infrastrukturteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Civil Engineering -- Infrastructure Engineering (hsv//eng)
Keyword
- Asphalt mixture; slump test; discrete element method; large displacement
- Byggvetenskap
- Civil and Architectural Engineering
Publication and Content Type
- ref (subject category)
- art (subject category)
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