Modeling the DSR complex shear modulus of asphalt binder using 3D discrete element approach

Dondi, Giulio; Vignali, Valeria; Pettinari, Matteo; Mazzotta, Francesco; Simone, Andrea; Sangiorgi, Cesare

doi:10.1016/j.conbuildmat.2013.12.005

Cited by 56 publications

(19 citation statements)

References 31 publications

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“…FS test was conducted in a range of frequencies between 0.01 and 10 Hz, at the temperatures of 0, 10, 20, 30, 40, 50 and 60°C. The 8 mm plate with a 2 mm gap was adopted in all the range of temperatures (Dondi et al 2014). With the FS test the complex shear modulus (G*) and the phase angle (δ) were measured.…”

Section: Frequency Sweep Testmentioning

confidence: 99%

Rheological Characterization of Bituminous Mastics Containing Waste Bleaching Clays

et al. 2015

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Bleaching clays are mostly used in food industries to clarify vegetal oils. After use they are generally dumped as waste (stage 1) or used in green innovative plants to feed biogas reactors (stage 2). In latter stage the initial residual oil content (approx. 25% by mass) is reduced to less than 1% by the biological process. In this study the bleaching clays effects on bituminous mastics of a traditional binder course Hot Mix Asphalt have been investigated. The physical characteristics of the two bleaching clays and of a traditional limestone filler were also studied. DSR rheological tests at high and low temperatures were performed on mastics samples containing different amounts of fillers (limestone, stage 1 or stage 2). The addition of the different waste bleaching clays significantly affects the rheological behavior of the mastics: the filler from stage 2 increases the mastic stiffness improving the resistance to permanent deformations as shown by repeated creep tests, while the filler from stage 1 strongly interacts with the bitumen reducing the mechanical characteristics of the mastics at all temperatures.

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Section: Frequency Sweep Testmentioning

confidence: 99%

Rheological Characterization of Bituminous Mastics Containing Waste Bleaching Clays

et al. 2015

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“…Its overall mechanical response is primarily governed by the asphalt binder and by the stone-on-stone contact between aggregates [5,6].…”

Section: Introductionmentioning

confidence: 99%

Influence of waxes on adhesion properties of bituminous binders

Lamperti

Grenfell

Sangiorgi

et al. 2015

Construction and Building Materials

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“…Burger’s model can be also embedded in traditional linear elastic contact models in which normal and shear stiffness of the contact changes by time to include viscous deformations. Vignali et al [ 12 ] and Dondi et al [ 13 ] adapted this approach of viscoelastic modeling to predict the rheological behavior of bituminous binders.…”

Section: Introductionmentioning

confidence: 99%

Discrete Element Method Modeling of the Rheological Properties of Coke/Pitch Mixtures

et al. 2016

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Rheological properties of pitch and pitch/coke mixtures at temperatures around 150 °C are of great interest for the carbon anode manufacturing process in the aluminum industry. In the present work, a cohesive viscoelastic contact model based on Burger’s model is developed using the discrete element method (DEM) on the YADE, the open-source DEM software. A dynamic shear rheometer (DSR) is used to measure the viscoelastic properties of pitch at 150 °C. The experimental data obtained is then used to estimate the Burger’s model parameters and calibrate the DEM model. The DSR tests were then simulated by a three-dimensional model. Very good agreement was observed between the experimental data and simulation results. Coke aggregates were modeled by overlapping spheres in the DEM model. Coke/pitch mixtures were numerically created by adding 5, 10, 20, and 30 percent of coke aggregates of the size range of 0.297–0.595 mm (−30 + 50 mesh) to pitch. Adding up to 30% of coke aggregates to pitch can increase its complex shear modulus at 60 Hz from 273 Pa to 1557 Pa. Results also showed that adding coke particles increases both storage and loss moduli, while it does not have a meaningful effect on the phase angle of pitch.

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Modeling the DSR complex shear modulus of asphalt binder using 3D discrete element approach

Cited by 56 publications

References 31 publications

Rheological Characterization of Bituminous Mastics Containing Waste Bleaching Clays

Rheological Characterization of Bituminous Mastics Containing Waste Bleaching Clays

Influence of waxes on adhesion properties of bituminous binders

Discrete Element Method Modeling of the Rheological Properties of Coke/Pitch Mixtures

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