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Effect of micro-scale morphological parameters on meso-scale response of Asphalt Concrete

Onifade, Ibrahim, 1983- (author)
KTH,Väg- och banteknik
Jelagin, Denis (author)
KTH,Väg- och banteknik
Guarin, Alvaro (author)
KTH,Väg- och banteknik
show more...
Birgisson, Björn (author)
KTH,Väg- och banteknik
Kringos, Nicole (author)
KTH,Väg- och banteknik
show less...
 (creator_code:org_t)
2014-08-07
2014
English.
In: Asphalt Pavements - Proceedings of the International Conference on Asphalt Pavements, ISAP 2014. - : CRC Press. - 9781315736754 ; , s. 1775-1784
  • Conference paper (peer-reviewed)
Abstract Subject headings
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  • With recent advancement in the use of X-Ray Computed Tomography to capture the internal structure of Asphalt Concrete (AC), results have shown several possibilities to account for the distribution of the different phases in the mix and quantify them in a reliable way. The morphology of asphalt mixtures which includes the aggregate size gradation and the distribution of the air-voids and bitumen phase are captured in a single morphological parameter called the Primary Structure (PS) coating thickness-(Tps). In this study, the effect of variations in the morphological micro-structural property on the mesoscale response of three (3) AC samples is examined using the 3D Finite Element Method (FEM). The AC internal geometry is acquired using X-Ray Computed Tomography (CT); the distribution of the aggregates, mastic and air-voids phase is considered and obtained using Digital Imaging Processing (DIP) techniques. Using a surface-based cohesive behavior and assuming a predominant adhesive failure at the interface between the mastic and aggregate, a maximum traction criterion is used to obtain the damage propensity of the different mixtures. The result of the analysis shows that the microstructural morphological parameter Tps adequately captures the meso-scale response of the mixtures; there exist an inverse relationship between mixture strength characterization and the morphological parameter Tps.

Subject headings

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

Keyword

Asphalt concrete morphology
Damage
Digital image processing
Micromechanical modeling
X-Ray computed tomography
Byggvetenskap
Civil and Architectural Engineering

Publication and Content Type

ref (subject category)
kon (subject category)

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Onifade, Ibrahim ...
Jelagin, Denis
Guarin, Alvaro
Birgisson, Björn
Kringos, Nicole
About the subject
ENGINEERING AND TECHNOLOGY
ENGINEERING AND ...
and Civil Engineerin ...
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Asphalt Pavement ...
By the university
Royal Institute of Technology

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