## Discrete Element Modeling of Asphalt ConcreteMicrofabric

# Discrete Element Modeling of Asphalt ConcreteMicrofabric

### Discrete Element Modeling of Asphalt Concrete: Microfabric ...

2018-12-10 Micromechanical modeling has tremendous potential benefits in the field of asphalt technology for reducing or eliminating costly tests to characterize asphalt-aggregate mixtures for the design and... Discrete Element Modeling of Asphalt Concrete: Microfabric Approach - William G. Buttlar, Zhanping You, 2001 Skip to main content

get price### Discrete Element Modeling of Asphalt Concrete: Microfabric ...

Buttlar et al. (2001) proposed a microfabric discrete element modeling (MDEM) approach for modeling asphalt concrete microstructure [2], in which aggregates were modeled with clusters of very ...

get price### Three-dimensional discrete element modeling of asphalt ...

2012-12-1 Discrete element model of asphalt concrete In this study, the asphalt concrete was considered as a two-phase composite of asphalt mastic and coarse aggregates larger than 2.36 mm. From the laboratory tests, the specific gravity of mineral aggregates and density of asphalt binder were 2.65 g/cm 3 and 1.06 g/cm 3, respectively.

get price### Lab assessment and discrete element modeling of asphalt ...

2018-9-10 Both laboratory and discrete element modeling were employed to investigate effects of coarse aggregate shapes on asphalt mixture compaction. Five types of aggregates were manually selected, and the SGC compaction tests and the corresponding discrete element modeling were conducted with seven combinations of those types of aggregates.

get price### Micromechanical Discrete Element Modeling of Asphalt ...

This study aims to investigate the shear fatigue performance of asphalt mixture and factors influencing performance using a three-dimensional (3D) discrete element method (DEM) incorporated with the Burgers model. The repeated uniaxial penetration test (RUPT), which is a shear fatigue test method for asphalt mixtures, was succinctly described.

get price### (PDF) Discrete element modelling of creep of asphalt mixtures

The microfabric discrete element modeling (MDEM) approach is used herein to predict the asphalt mixture complex modulus in extension/compression across a range of test temperatures and load ...

get price### Accelerated Discrete-Element Modeling of Asphalt-Based ...

This paper presents a methodology to reduce the computation time for discrete-element (DE) modeling of asphalt-based materials, based on the frequency-temperature superposition principle. Laboratory tests on the dynamic modulus of asphalt sand mastics and asphalt mixtures were conducted at temperatures of - 5 , 4, 13, and 21°C and frequencies ...

get price### Discrete fracture modeling of asphalt concrete - ScienceDirect

2009-6-15 A heterogeneous fracture model, based on the discrete element method (DEM), is developed to investigate various fracture toughening mechanisms of asphalt materials using a high-resolution image processing technique.

get price### Imaged-based discrete element modeling of hot mix asphalt ...

2014-5-9 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.

get price### Discrete element visco-elastic modelling of a realistic ...

2014-2-1 A typical three-dimensional microstructural-based discrete element viscoelastic modelling process is extremely time-consuming. McDowell et al. (2009) found a scaling method by using a dimensional analysis for viscoelasticity and velocity in discrete element modelling of strain control tests on asphalt. They have proved that the effect of ...

get price### Discrete Element Modeling of Asphalt Concrete: Microfabric ...

Buttlar et al. (2001) proposed a microfabric discrete element modeling (MDEM) approach for modeling asphalt concrete microstructure [2], in which aggregates were modeled with clusters of very ...

get price### DISCRETE ELEMENT MODELING OF ASPHALT CONCRETE: MICROFABRIC ...

A microfabric discrete element modeling (MDEM) approach is presented for modeling asphalt concrete microstructure. The technique is a straightforward extension of a traditional discrete element modeling (DEM) analysis, in which various material phases (e.g., aggregates, mastic) are modeled with clusters of very small, discrete elements.

get price### Lab assessment and discrete element modeling of asphalt ...

2018-9-10 Both laboratory and discrete element modeling were employed to investigate effects of coarse aggregate shapes on asphalt mixture compaction. Five types of aggregates were manually selected, and the SGC compaction tests and the corresponding discrete element modeling were conducted with seven combinations of those types of aggregates.

get price### (PDF) Discrete element modelling of creep of asphalt mixtures

The microfabric discrete element modeling (MDEM) approach is used herein to predict the asphalt mixture complex modulus in extension/compression across a range of test temperatures and load ...

get price### Lab assessment and discrete element modeling of asphalt ...

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 ...

get price### Accelerated Discrete-Element Modeling of Asphalt-Based ...

Accelerated Discrete-Element Modeling of Asphalt-Based Materials with the Frequency-Temperature Superposition Principle Yu Liu1 and Zhanping You, Ph.D., P.E., M.ASCE2 Abstract ...

get price### Discrete fracture modeling of asphalt concrete - ScienceDirect

2009-6-15 Discrete element method. Bilinear cohesive zone model. 1. Introduction. Asphalt concrete is a quasi-brittle composite material composed of solid inclusions (aggregates) and a viscous matrix (asphalt mastic). The mastic is composed of fine sands and asphalt binder, and holds larger aggregates together. The fracture of heterogeneous solids is a ...

get price### Imaged-based discrete element modeling of hot mix asphalt ...

2014-5-2 Liu et al. (2012) investigated effects of element sizes in threedimensional discrete element modeling of asphalt concrete and found that discrete element sizes had insignificant effects on creep ...

get price### Discrete element modelling of idealised asphalt mixture

Discrete element modeling has been used to simulate constant strain rate compressive tests for an idealized asphalt mixture comprising approximately single-sized sand particles.

get price### Discrete element modelling of uniaxial constant strain ...

2013-2-16 Constant strain rate tests for a graded asphalt mixture under three constant strain rates have been undertaken in the laboratory. The Discrete Element Model has been used to simulate the laboratory tests with a numerical sample preparation procedure being developed to represent the physical specimen. The Burger’s model has been used to represent the time dependent behavior of the asphalt ...

get price### DISCRETE ELEMENT MODELING OF ASPHALT CONCRETE: MICROFABRIC ...

A microfabric discrete element modeling (MDEM) approach is presented for modeling asphalt concrete microstructure. The technique is a straightforward extension of a traditional discrete element modeling (DEM) analysis, in which various material phases (e.g., aggregates, mastic) are modeled with clusters of very small, discrete elements.

get price### Three-dimensional discrete element modeling of asphalt ...

Abstract This paper investigated effects of element sizes in three-dimensional discrete element modeling of asphalt concrete. Asphalt concrete was considered as a two-phase composite of mineral aggregates larger than 2.36 mm and asphalt mastic. Even though asphalt mastic was a composite of fines, fine aggregates, asphalt, and air voids in the reality, it was considered as a homogenous media to ...

get price### Modeling of asphalt by means of discrete element method ...

Discrete element method (DEM) is one type of numerical simulation method which allows the finite displacement and rotation of discrete particles, making it an excellent tool to simulate the complex micro interaction between aggregate particles within an asphalt mixture, [3],[4] .

get price### Discrete Element Modelling of Idealised Asphalt Mixture

2016-11-19 and modelling the deformation behaviour of asphalt mixtures. With the Discrete Element Method (DEM), it is possible to model materials that consist of individual particles where a particle may roll or slide relative to other particles. The DEM offers a means of gaining an insight into the micromechanics of the deformation process.

get price### Micromechanical simulation of porous asphalt mixture ...

2021-8-11 The microfabric discrete element modeling (MDEM) approach is used herein to predict the asphalt mixture complex modulus in extension/compression across a range of test temperatures and load ...

get price### Discrete element modelling of uniaxial constant strain ...

2013-2-16 Constant strain rate tests for a graded asphalt mixture under three constant strain rates have been undertaken in the laboratory. The Discrete Element Model has been used to simulate the laboratory tests with a numerical sample preparation procedure being developed to represent the physical specimen. The Burger’s model has been used to represent the time dependent behavior of the asphalt ...

get price### New discrete element framework for modelling asphalt ...

2020-4-10 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;

get price### Micromechanical Modeling of Asphalt Concrete Uniaxial ...

2018-6-14 Micromechanical Modeling of Asphalt Concrete Uniaxial Creep Using the Discrete Element Method Habtamu Melese Zelelew University of Minnesota Duluth , Duluth , MN , 55812 Phone: (218) 726-8427 E-mail: [email protected]

get price### (PDF) Three-dimensional discrete element models for ...

Three-dimensional discrete element models for asphalt mixtures. Download. 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. By Imad L . Al-Qadi

get price### Discrete element modelling on creep behaviour of PI/SiO_2 ...

School of Transportation, Southeast University, Nanjing 210096, China), Discrete Element Modeling of Asphalt Concrete Cracking Using a User-defined Three-dimensional Micromechanical Approach, Journal of Wuhan University of Technology(Materials Science Edition),

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