Modelling and evaluation of aggregate morphology on asphalt compression behavior

Liu, Pengfei; Hu, Jing; Wang, Dawei; Oeser, Markus; Alber, Stefan; Ressel, Wolfram; Falla, Gustavo Canon

doi:10.1016/j.conbuildmat.2016.12.041

Cited by 103 publications

(36 citation statements)

References 27 publications

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“…There are two main parameters that are to be preserved in the numerical modeling of this material: total volumetric ratios of the matrix and the inclusions as well as the particle size distribution determined by the gradation curve. As reported in [4], the angularity of the aggregate particles plays also a vital role in the behavior of the structures (cylindrical samples, therein) made of AC. There is a large body of the literature devoted to the AC microstructure generation (see, e.g., in [3][4][5]7,13,14,16,17]).…”

Section: Microstructure Generationmentioning

confidence: 83%

“…A reliable modeling of the AC microstructure plays a vital role in the whole numerical analysis. As reported in [4], not only the spatial distribution of the aggregate particles and their gradation influence the behavior of the asphalt materials subjected to the external loads, but also the morphology of these inclusions has to be carefully modeled, as it has a strong impact on the overall response due to different mechanisms of the particles clinching and interaction that depend on the inclusion shapes. Thus, we present below our algorithm for an effective modeling of the AC microstructure.…”

Section: Methodsmentioning

confidence: 99%

“…In order to make the analysis of such a domain feasible, a geometry simplification is performed (c.f. [4]).…”

Section: Microstructure Generationmentioning

confidence: 99%

“…A development of the material models for the mastic/binder is a very active field of science. Inelastic analyses of AC can be found, e.g., in [2][3][4][5][6][7][8][9][10][11][12][13][14]. For the sake of brevity, we restrict ourselves in this paper only to the linear elastic computations, since we focus in this paper on the synthetic microstructure generation and the multiscale computations.…”

Section: Introductionmentioning

confidence: 99%

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Synthetic Microstructure Generation and Multiscale Analysis of Asphalt Concrete

Klimczak

Cecot

2020

Applied Sciences

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In this paper, we present an enhanced framework for the synthetic asphalt concrete (AC) microstructure generation for the numerical analysis purposes. It is based on the Voronoi tessellation concept with some necessary extensions that allow for the reliable generation of the aggregate particles of the given size distribution. The synthetic microstructure generation allows for faster numerical modeling of the novel materials. It can partially replace the X-ray computed tomography approach, which is frequently used in such analysis. Our framework is a kind of compilation of the known techniques with the enhancements applied to expedite the microstructure modeling process. Therefore, the generated microstructure is used in the numerical upscaling to model the macroscale asphalt concrete properties. We restrict ourselves (in this paper only) to the 2D elastic computations. We also assume the perfect bonding between these two materials and the static load for the sake of simplicity. The upscaling is performed by the multiscale finite element method (MsFEM). A short recapitulation of the MsFEM foundations as well as the numerical test comparing the overkill mesh solution with the upscaled one is provided in the paper. The test results confirm that the whole presented methodology can serve as a fast and reliable tool for the tests on novel asphalt mixtures and other heterogeneous materials. It can reduce the cost of the design process substituting some of the laboratory experiments, giving the opportunity to test the developed constitutive models and expedite the numerical analysis itself.

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Section: Microstructure Generationmentioning

confidence: 83%

Section: Methodsmentioning

confidence: 99%

“…In order to make the analysis of such a domain feasible, a geometry simplification is performed (c.f. [4]).…”

Section: Microstructure Generationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthetic Microstructure Generation and Multiscale Analysis of Asphalt Concrete

Klimczak

Cecot

2020

Applied Sciences

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“…The reason why asphalt mixture is so popular is its good pavement and service performance [3,4]. In China, the road network has well developed over the past decades due to the rapid growth of the national economy.…”

Section: Introductionmentioning

confidence: 99%

Feasibility Evaluation of Preparing Asphalt Mixture with Low-Grade Aggregate, Rubber Asphalt and Desulphurization Gypsum Residues

Zhang

Chen

et al. 2018

Materials

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Road construction consumes great amounts of high-grade natural resources. Using low-grade natural rocks or some solid wastes as substitute materials is a hot topic. Considering this, the feasibility of using low-grade granite aggregate, solid waste-based filler (desulphurization gypsum residues, DGR) and binder (waste tire rubber modified asphalt, RMA) simultaneously in asphalt mixtures has been fully investigated in this research. The commonly used base asphalt and limestone powder (LP) filler were control groups. Material characteristics of raw materials mainly including micro-morphology, functional group, mineral phase, chemical composition and thermal stability were first evaluated in order to recognize them. Four asphalt mixtures (two asphalt binder and two filler) were then designed by standard Superpave method. Finally, a detailed investigation into the pavement performance of asphalt mixtures was carried out. The moisture damage resistance and low-temperature crack resistance were detected by the changing rules of stability, strength and fracture energy, and the high-temperature stability and fatigue performance were determined by wheel tracking test and indirect tensile (IDT) fatigue test, respectively. Results suggested that RMA and DGR both showed positive effects on the low-temperature crack resistance and fatigue property of the granite asphalt mixture. DGR also strengthened moisture stability. The contribution of RMA on high-temperature deformation resistance of the granite asphalt mixture was compelling. It can offset the insufficiency in high-temperature stability made by DGR. A conclusion can be made that asphalt mixture prepared with granite, DGR and RMA possesses satisfactory pavement performances.

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