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Influence of layer thickness on the flow of asphalt under simulated compaction

Ghafoori Roozbahany, Ehsan, 1982- (author)
KTH,Byggnadsmaterial
Partl, Manfred (author)
KTH,Byggnadsmaterial
Guarin, Alvaro (author)
KTH,Byggnadsmaterial
 (creator_code:org_t)
CRC Press/Balkema, 2018
2018
English.
In: Bearing Capacity of Roads, Railways and Airfields - Proceedings of the 10th International Conference on the Bearing Capacity of Roads, Railways and Airfields, BCRRA 2017. - : CRC Press/Balkema. - 9781138295957 ; , s. 1435-1441
  • Conference paper (peer-reviewed)
Abstract Subject headings
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  • Compaction is one of the most important phases in the life cycle of asphalt pavements and has therefore been a hot subject of research for a long time. However, despite of valuable research efforts on this topic, a remarkable gap between laboratory and field measurements still remains. Moreover, whereas most of the experimental methods are carried out on compacted pavement material, methods for evaluating compactability of asphalt mixtures for increasing the fundamental knowledge about internal movements within the asphalt during compaction are only scarce. Hence, in this study, a recently developed tool for simulating the compaction process with respect to the particle flow, i.e. Compaction Flow Test (CFT), was used along with simultaneous X-ray imaging for investigating the impact of thickness changes on two different asphalt mixture structures in terms of the compaction effort as well as flow pattern differences. The results of the investigation provided reasonably useful input for building up a better understanding of the behavior of mixtures under compaction loads. This method was able to successfully reveal the differences of the structural rearrangements within the asphalt mixtures for three different lift thicknesses. It also helped to explain some of the previous research studies results in a more comprehensive way. The achievements of this study may serve for developing an in-site evaluating test method for assessing compactability of asphalt mixtures before placing them on the roads.

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Samhällsbyggnadsteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Civil Engineering (hsv//eng)

Keyword

Compactability
Lift thickness
Particle flow
X-ray computed tomography
Bearing capacity
Compaction
Computerized tomography
Flow patterns
Life cycle
Mixtures
Railroads
Compaction effort
Compaction process
Experimental methods
Field measurement
Structural rearrangement
Asphalt mixtures

Publication and Content Type

ref (subject category)
kon (subject category)

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Partl, Manfred
Guarin, Alvaro
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ENGINEERING AND TECHNOLOGY
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Royal Institute of Technology

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