discrete element method (dem) analyses for hotmix asphalt

Discrete Element Method (DEM) Analyses for Hot-Mix Asphalt ...

Jun 09, 2011  Discrete Element Method (DEM) is a discontinuum analysis method, which can simulate the deformation process of joint systems or discrete particle assembly under quasi-static and dynamic condition. Therefore, it can overcome the shortcomings of FEM and is a more effective tool than FEM to simulate asphalt mixture compaction.

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Discrete Element Method (DEM) Analyses of Hot-Mix Asphalt ...

Asphalt mixture compaction is an important procedure of asphalt mixture construction and can significantly affect the performance of asphalt pavement. In this paper, an open source DEM code was applied to simulate the compaction of hot-mix asphalt (HMA) with the Superpave gyratory compactor. The asphalt mixture compaction process, air voids distribution, internal coarse aggregate structure ...

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Discrete Element Method (DEM) Analyses of Hot-Mix Asphalt ...

Discrete Element Method (DEM) Analyses of Hot-Mix Asphalt (HMA) Mixtures Compaction and Internal Structure January 2013 Advanced Materials Research 639-640(1):1287-1294

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University of Tennessee, Knoxville TRACE: Tennessee ...

I am submitting herewith a dissertation written by Jingsong Chen entitled “Discrete Element Method (DEM) Analyses for Hot-Mix Asphalt (HMA) Mixture Compaction.” I have examined the final electronic copy of this dissertation for form and content and recommend that it be accepted in partial fulfillment of the requirements for the degree of

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Numerical Simulation of HMA Compaction Using Discrete ...

asphalt mix design, it is highly dependent on engineers’ experience to select a good aggregate blend and the process is time-consuming and requires significant human and materials resources. In this study, discrete element method (DEM) was used to simulate the compaction of hot-mix asphalt (HMA) with the Superpave gyratory compactor (SGC).

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New discrete element framework for modelling asphalt ...

contribute to this important topic, by presenting a new Discrete Element Method (DEM)-based modelling approach to study the asphalt compaction process. Discrete Element Method (DEM) received recently considerable attention as an analysis tool for studying the mechanical behaviour of asphalt mixtures (e.g. Collop, McDowell, Lee, 2006;

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Micromechanical Fracture Modeling of Asphalt Mixture Using ...

Therefore, discrete element method (DEM) was utilized to evaluate the influence of each construction parameter on the interlock between the cold and the hot side of an asphalt pavement joint.

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(PDF) Air-Void Distribution Analysis of Asphalt Mixture ...

An open source discrete element method (DEM) code was em- ployed to simulate asphalt mixture gyratory and vibratory compac- tions so that the air void distribution with in compacted asphalt

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(PDF) Micromechanical Simulation of Hot Mix Asphalt

A model based on the discrete element method (DEM), ASBAL was developed by modifying Se TRUBAL program to simulate hot mix asphalt (HMA). To represent asphaltcement, several viscoelastic elements ...

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Discrete Element Analysis of the Influences of Aggregate ...

Discrete Element Analysis of the Influences of Aggregate Properties and Internal Structure on Fracture in Asphalt Mixtures. Increased loads on hot-mix asphalt (HMA) pavements have necessitated the development of new-generation asphalt mixture designs that rely on stone-on-stone contact among coarse aggregates in resisting and distributing applied loads.

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Micromechanical Modeling of Hot-Mix Asphalt Mixtures by ...

Micromechanical Modeling of Hot-Mix Asphalt Mixtures by Imaging and Discrete Element Methods. This study focused on the application of a clustered micromechanical discrete-element modeling (DEM) technique to predict the uniaxial compression dynamic modulus of hot-mix asphalt

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New discrete element framework for modelling asphalt ...

contribute to this important topic, by presenting a new Discrete Element Method (DEM)-based modelling approach to study the asphalt compaction process. Discrete Element Method (DEM) received recently considerable attention as an analysis tool for studying the mechanical behaviour of asphalt mixtures (e.g. Collop, McDowell, Lee, 2006;

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Lab assessment and discrete element modeling of asphalt ...

Sep 10, 2018  Finally, the air void curves and results of discrete element modeling (DEM) were used to evaluate the influences of selected coarse aggregate shapes on asphalt mixture compaction. It was found that the asphalt mixtures with 100% angular or 100% fractured coarse aggregates were easier to compact compared with asphalt mixtures of hybrid coarse ...

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(PDF) Air-Void Distribution Analysis of Asphalt Mixture ...

An open source discrete element method (DEM) code was em- ployed to simulate asphalt mixture gyratory and vibratory compac- tions so that the air void distribution with in compacted asphalt

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Micromechanical Modeling of Hot-Mix Asphalt Mixtures by ...

This study focused on the application of a clustered micromechanical discrete-element modeling (DEM) technique to predict the uniaxial compression dynamic modulus of hot-mix asphalt (HMA) mixtures. Six HMA mixtures were made with two types of asphalts and two

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Update on the Discrete Element Method in Engineering

Figure 1. Particulate materials and construction of asphalt mixture Discrete Element Method Cundall [16] introduced discrete element methods (DEM) for the analysis of rock-mechanics problems and since then it has been developed in granular material analysis [17-32]. The original application of this method was to investigate the behavior of

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Micro-mechanical analysis of high modulus asphalt concrete ...

Sep 30, 2019  In this study, the discrete element method (DEM) was used to establish the asphalt pavement structure models. The stress and displacement distribution of the two pavement structures under the static load were compared and analyzed. Based on the results of this study, the conclusions obtained were as follows: 1.

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Altair EDEM Applications

EDEM software, powered by the Discrete Element Method (DEM), accurately simulates the behavior of rocks, soils, gravel, grains, tablets and powders and their interaction with equipment during a range of operation and process conditions. EDEM is used globally in all industries that handle or process bulk and granular materials, from heavy equipment and off-road, to mining, metals, as well as ...

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Imaged-based discrete element modeling of hot mix asphalt ...

May 09, 2014  This paper presents the development of micro-mechanical discrete element model for hot mix asphalt (HMA) mixtures modified with carbon nanofibers using the advanced imaging techniques. Shape-structural model of two-phased HMA consisting of aggregate and matrix was generated using cluster of small discrete disk-shaped particles for each phase.

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Numerical Studies on Asphalt Concretes SpringerLink

Computational modeling of asphalt mixtures is discussed in this chapter using different methods of DEM (discrete element method), FEM (finite element method) and XFEM (extended finite element...

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Air-Void Distribution Analysis of Asphalt Mixture Using ...

Air void distribution within an asphalt mixture specimen is related to several factors, such as compaction effort, method of compaction (equipment), and aggregate gradation. In this study, virtual digital specimens generated by an open source discrete element method (DEM) program were utilized to investigate the effect of compaction factors on ...

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graphical analysis of hot mix asphalt

Discrete Element Method (DEM) Analyses for Hot-Mix Asphalt. Discrete Element Method (DEM) Analyses for Hot-Mix Asphalt (HMA) Mixture Compaction Jingsong Chen University of Tennessee - Knoxville, [email protected] This Dissertation is brought to you for free and open access by the Graduate School at Trace: Tennessee .

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Three-Dimensional Discrete Element Models for Asphalt

Three-Dimensional Discrete Element Models for Asphalt Mixtures. Cheng Zhu. Related Papers. Prediction of Creep Stiffness of Asphalt Mixture with Micromechanical Finite-Element and Discrete-Element Models. By Zhanping You. Micromechanical finite element modeling of moisture damage in bituminous composite materials.

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graphical analysis of hot mix asphalt

Discrete Element Method (DEM) Analyses for Hot-Mix Asphalt. Discrete Element Method (DEM) Analyses for Hot-Mix Asphalt (HMA) Mixture Compaction Jingsong Chen University of Tennessee - Knoxville, [email protected] This Dissertation is brought to you for free and open access by the Graduate School at Trace: Tennessee .

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Imaged-based discrete element modeling of hot mix asphalt ...

May 09, 2014  This paper presents the development of micro-mechanical discrete element model for hot mix asphalt (HMA) mixtures modified with carbon nanofibers using the advanced imaging techniques. Shape-structural model of two-phased HMA consisting of aggregate and matrix was generated using cluster of small discrete disk-shaped particles for each phase.

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SIMULATION OF THE PERMANENT DEFORMATION OF

MIXTURES USING DISCRETE ELEMENT METHOD (DEM) Abstract by Habtamu Melese Zelelew, Ph.D. Washington State University May 2008 Chair: Tom Papagiannakis This study describes a methodology for simulating the permanent deformation resistance behavior of asphalt concrete mixtures using the discrete element method (DEM).

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Air-Void Distribution Analysis of Asphalt Mixture Using ...

Air void distribution within an asphalt mixture specimen is related to several factors, such as compaction effort, method of compaction (equipment), and aggregate gradation. In this study, virtual digital specimens generated by an open source discrete element method (DEM) program were utilized to investigate the effect of compaction factors on ...

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Impact of aggregate packing on dynamic modulus of hot mix ...

Impact of aggregate packing on dynamic modulus of hot mix asphalt mixtures using three-dimensional discrete element method Author(s) H. Yu, S. Shen Publisher Elsevier Source Construction and Building Materials Keywords Aggregate Gradation, Discrete element modeling, Dynamic Modulus, Packing, Voids in Mineral Aggregate, Volumetric Property Year 2012

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Three-Dimensional Discrete Element Models for Asphalt Mixtures

Three-Dimensional Discrete Element Models for Asphalt Mixtures. IntroductionSilos are structures designed for the storage of very different granular materials in the agricultural, food, mining, chemical, pharmaceutical and other industries (Langston, Tüzün, Heyes, 1995). Given the size these structures can sometimes reach, their design must ...

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Micro-mechanical analysis of high modulus asphalt concrete ...

Sep 30, 2019  In this study, the discrete element method (DEM) was used to establish the asphalt pavement structure models. The stress and displacement distribution of the two pavement structures under the static load were compared and analyzed. Based on the results of this study, the conclusions obtained were as follows: 1.

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Three-Dimensional Discrete Element Models for Asphalt

Three-Dimensional Discrete Element Models for Asphalt Mixtures. Cheng Zhu. Related Papers. Prediction of Creep Stiffness of Asphalt Mixture with Micromechanical Finite-Element and Discrete-Element Models. By Zhanping You. Micromechanical finite element modeling of moisture damage in bituminous composite materials.

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Investigation of fracture toughening using the clustered ...

A clustered discrete element method (DEM) is employed as a means to investigate fracture mechanisms in asphalt concrete at low temperatures. A bilinear cohesive softening model is implemented into the DEM framework to enable simulation of crack initiation and propagation in asphalt

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Micromechanical fracture modeling of asphalt concrete ...

image analysis, is introduced to investigate the fracture behavior of asphalt concrete and to simulate crack nucleation, initiation and propagation including both mode I and mixed-mode behavior. 2 Discrete element method The discrete element method (DEM) originally developed by Cundall [16] has proven to

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ATCx DEM 2020 - Simulating Hot Mix Asphalt from Rock to Road

The production of hot mix asphalt (HMA) involves drying and heating aggregates and mixing and coating the aggregates with liquid asphalt bitumen. This process presents many simulation challenges. As an equipment manufacturer Astec uses simulation to improve equipment design and performance, but the changing characteristics of the HMA mixture during the production process has meant the ...

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New discrete element framework for modelling asphalt ...

During asphalt mixture compaction, loads in the material are mainly transferred through contact between the stones and the interaction between the stones and the binder. The behaviour of such materials is suitable to model using the Discrete Element Method (DEM). In this study, a new DEM modelling approach has been developed for studying the asphalt compaction process, incorporating contact ...

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NCSU

ABSTRACT YOUM, HYESEON. Discrete Element Modeling of Geosynthetic Reinforcement in Pavement Overlays. (Under the direction of Dr. Mohammed A. Gabr and Dr. Y. Richard Kim). Reflect

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A Comparison of Two-Dimensional and Three-Dimensional ...

however, most of the early studies were based on two-dimensional finite element method (FEM) and discrete element method (DEM). Masad et al. (2001) studied the strain distribution in asphalt concretes by using micromechanical analysis, FEM, and experimental measurements. Papagiannakis et al. (2002) explored a method by

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