Numerical Simulation of Asphalt Compaction and Asphalt Performance

Liu, Pengfei; Wang, Chonghui; Otto, Frédéric; Hu, Jing; Moharekpour, Milad; Wang, Dawei; Oeser, Markus

doi:10.1007/978-3-030-75486-0_2

Cited by 2 publications

(3 citation statements)

References 36 publications

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“…When the speed was raised again, to 6 m/min, the activity of the asphalt aggregate was relatively weak, with the angular velocity floating between −0.1 rad/s and 0.2 rad/s. The data generated with paving speed as a variable compared to [2], a similar pattern was found that if the paving speed is faster while keeping other conditions constant, the asphalt mixture will compact less during the preliminary compaction stage. The whole paving operation must be carried out at a constant pace without stopping in order to increase the mixture's evenness and to minimize segregation.…”

Section: Effect Of the Paving Speed On The Paving Processmentioning

confidence: 57%

“…The field compaction process is typically divided into three stages: preliminary compaction, repeated compaction, and final compaction. The preliminary compaction process has a direct influence on the asphalt pavement, which should be compacted and stabilized to fulfill technical criteria and create favorable circumstances for the following steps [2]. The asphalt mix paver is used for the preliminary compaction process, which is to lay the asphalt mixture according to engineering technology specifications with a certain width and thickness uniformly on the base's surface, as well as to perform preparatory vibration compaction and screeding of the paving [3].…”

Section: Introductionmentioning

confidence: 99%

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Development of an FEM-DEM Model to Investigate Preliminary Compaction of Asphalt Pavements

et al. 2022

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Variations in pavement density have been widely monitored and investigated, both in laboratory and in field experiments, since the compaction of pavement is so critical to its long-term performance quality. In contrast to field testing, laboratory tests are simpler to produce but less accurate. Destructive drilled samples are used to conduct field testing; however, they are limited in their ability to assess density information at specific areas. The use of computationally aided approaches, such as the Finite Element Method (FEM) and the Discrete Element Method (DEM), in research involving asphalt mixtures is increasing, since these methods simulate and evaluate the characteristics of asphalt mixtures at macroscopic and microscopic scales. Individual particle behavior at the microscopic level cannot be fully represented using the FEM alone, and the computing cost of utilizing the DEM approach alone is prohibitively high. The objective of this work is to simulate the pre-compaction process by using the coupled FEM-DEM approach. In order to investigate the impact of the asphalt mixtures’ gradation, a dense-graded asphalt mixture (AC 11) and a gap graded asphalt mixture (PA 11) were simulated. Different paving speeds (4, 5, and 6 m/min) were applied on the preliminary compaction model of AC 11 to study the effect of the paving speeds on the compaction process. By comparing the angular velocity, which worked as a reference of compaction quality, it was demonstrated that the grade AC 11 asphalt mixtures performed better in the preliminary compaction process compared to the grade PA 11 asphalt mixtures. Moreover, since it has an effect on compaction, paving speed was carefully monitored and kept within a reasonable range in order to maximize both pavement quality and project efficiency.

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Section: Effect Of the Paving Speed On The Paving Processmentioning

confidence: 57%

Section: Introductionmentioning

confidence: 99%

Development of an FEM-DEM Model to Investigate Preliminary Compaction of Asphalt Pavements

et al. 2022

Self Cite

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“…At the same time, the contact pair is defined to simulate the contact between the tire and the pavement, and the friction coefficient is used to simulate the interactive relationship between the tire and the pavement. According to the literature, 28 the friction coefficient is 0.5. The tire-pavement contact model is shown in Figure 10.…”

Section: Finite Element Modeling Of a Radial Tirementioning

confidence: 99%

Predictions of three-dimensional contact stresses of a radial truck tire under different driving modes

Xie

et al. 2022

Advances in Mechanical Engineering

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In pavement design, vehicle load is typically simplified as vertical circular uniform loading. Due to the vehicle dynamic effect and deformation of a tire, non-uniform three-dimensional contact stresses are produced at the contact interface between the tire and pavement under different driving modes. For this paper, an 11R22.5 truck radial tire was selected. Considering the geometric nonlinearity and large deformation of the tire and nonlinear characteristics of tire-pavement contact, the Neo-Hookean and Rebar models are used to simulate the hyperelastic rubber material and rubber-cord composite material, respectively. The three-dimensional contact stress distribution under static, free rolling, acceleration, braking, and cornering modes was simulated and analyzed. The results show that inflation pressure, axle load, and friction coefficient of the tire significantly affect the three-dimensional contact stress distribution. Further, three-dimensional stresses are non-uniformly distributed, rather than in the traditional simplified circular uniform load. The three-dimensional stress distribution of tire-pavement in different driving modes is also significantly different. The vertical and lateral stresses in the state of cornering are the largest, the longitudinal stress in the state of braking is the largest as well. The research results provide reference for future pavement design and pavement damage analysis.

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Numerical Simulation of Asphalt Compaction and Asphalt Performance

Cited by 2 publications

References 36 publications

Development of an FEM-DEM Model to Investigate Preliminary Compaction of Asphalt Pavements

Development of an FEM-DEM Model to Investigate Preliminary Compaction of Asphalt Pavements

Predictions of three-dimensional contact stresses of a radial truck tire under different driving modes

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