DEM simulation of the thermo-geomechanical effect of recycled concrete aggregate assemblies in geothermal pavement bases

Baghban, Hooman; Arulrajah, Arul; Narsilio, Guillermo A.; Horpibulsuk, Suksun

doi:10.1016/j.trgeo.2021.100528

Cited by 6 publications

(2 citation statements)

References 22 publications

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“…The most widely used model to describe the powder dynamics is the linear spring-dashpot (LSD) model [7,8], followed by the Hertzian model [9]. DEM is widely used in several fields such as soil J o u r n a l P r e -p r o o f mechanics [10][11][12], mould filling [13][14][15], powder mixing [16][17][18] or powder transportation [19,20], among others. The modelled material in all these research scenarios have in common the direct treatment of every interaction between particles and prediction of their velocities and position using the Newton's Laws.…”

Section: Introductionmentioning

confidence: 99%

Design of new industrial mould filling systems for the manufacture of ceramic tiles using a discrete element framework

et al. 2022

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Section: Introductionmentioning

confidence: 99%

Design of new industrial mould filling systems for the manufacture of ceramic tiles using a discrete element framework

et al. 2022

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“…In addition, temperature variation may cause a change in internal fabric and mechanical response in granular media. Baghban et al [13] reported that the cyclic behavior of aggregates at a constant temperature depends on several factors like particle size distribution, porosity, matric suction, and coordination number (CN).…”

Section: Introductionmentioning

confidence: 99%

Evaluating the effective thermal conductivity of geothermal pavements constructed using demolition wastes by DEM and 3D printing techniques

et al. 2021

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This paper studies the effect of various parameters on the effective thermal conductivity (k eff ) of the geothermal pavement system when constructed using construction and demolition (C&D) materials. Recycled asphalt pavement (RAP) and recycled concrete aggregates (RCA) were utilized to experimentally model the geothermal pavement system, consisting of copper tubes to circulate water in the pavement and harness thermal energy. Numerical computational fluid dynamics (CFD) and discrete element method (DEM) methods were used to simulate the geothermal pavement system. Six samples of RAP and RCA aggregates with different particle size distributions were utilized to study the effect of important parameters in the geothermal pavement system. According to the results, coupled CFD-DEM approach could simulate the heat transfer mechanism in geothermal pavement compared to the results of the CFD simulation. The results indicated that increasing porosity would decrease k eff . The decrease rate depended on the gravel content of the sample where samples with a higher gravel content experienced a higher rate of decrease. Also, simulation results showed that increasing the gravel content could increase the value of k eff . Increasing the axial stress resulted in an increase in the value of coordination number (CN) and k eff . Moreover, comparing the thermal power and contact distributions indicated that the morphology of the heat conduction was the same as the contact network distribution. To study the effect of the particle shape on k eff , a novel approach was used that comprised of 3D scanning and printing real particle shape of RCA aggregates by thermochromic material. Simulated assemblies with DEM were verified using 3D printed particles. The effect of aspect ratio (AR) on k eff was studied which indicated that increasing AR would increase k eff . Decreasing AR to one, on the other hand, increased the time needed to reach the steady state.

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Effect of particle distribution on the shear behavior of recycled concrete aggregate

Zhu

Wang

et al. 2022

Arab J Geosci

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DEM simulation of the thermo-geomechanical effect of recycled concrete aggregate assemblies in geothermal pavement bases

Cited by 6 publications

References 22 publications

Design of new industrial mould filling systems for the manufacture of ceramic tiles using a discrete element framework

Design of new industrial mould filling systems for the manufacture of ceramic tiles using a discrete element framework

Evaluating the effective thermal conductivity of geothermal pavements constructed using demolition wastes by DEM and 3D printing techniques

Effect of particle distribution on the shear behavior of recycled concrete aggregate

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