Experimental and numerical analysis of asphalt flow in a slump test

QC 20190319
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.

TEKNIK OCH TEKNOLOGIER Samhällsbyggnadsteknik Infrastrukturteknik hsv//swe
ENGINEERING AND TECHNOLOGY Civil Engineering Infrastructure Engineering hsv//eng
Asphalt mixture; slump test; discrete element method; large displacement
Byggvetenskap
Civil and Architectural Engineering

Jelagin, DenisKTH,Byggnadsmaterial(Swepub:kth)u1mpz2x5 (författare)
Partl, ManfredKTH,Byggnadsmaterial,EMPA–Swiss Federal Laboratories for Materials Science and Technology, Duebendorf, Switzerland(Swepub:kth)u1t8ihgf (författare)
KTHByggnadsmaterial (creator_code:org_t)

Ingår i:International Journal on Road Materials and Pavement Design: Taylor & Francis20, s. S446-S4611468-06292164-7402

Av författaren/redakt...: Chen, Feng, 1987 ...; Jelagin, Denis; Partl, Manfred

Om ämnet

TEKNIK OCH TEKNOLOGIER: TEKNIK OCH TEKNO ...; och Samhällsbyggnads ...; och Infrastrukturtek ...

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.