Influences by air voids on fatigue life of asphalt mixture based on discrete element method

Ma, Tao; Zhang, Yao; Zhang, Deyu; Yan, Jinhai; Qin, Yong

doi:10.1016/j.conbuildmat.2016.09.045

Cited by 64 publications

(20 citation statements)

References 20 publications

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“…The dissipated energy of each loading cycle remains approximately constant [27,28]. Thus, the energy-controlled loading mode was proposed in this study, and the method to achieve it utilized a four-point bending (4PB) fatigue test device.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Evaluation of Recycled Asphalt Mixture Based on Energy-Controlled Mode

Cui

Huang

2017

Advances in Materials Science and Engineering

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The fatigue properties of asphalt mixtures are important inputs for mechanistic-empirical pavement design. To understand the fatigue properties of asphalt mixtures better and to predict the fatigue life of asphalt mixtures more precisely, the energy-controlled test mode was introduced. Based on the implementation theory, the laboratory practice for the energy-controlled mode was realized using a four-point-bending fatigue test with multiple-step loading. In this mode, the fatigue performance of typical AC-20 asphalt specimens with various reclaimed asphalt pavement (RAP) contents was tested and evaluated. Results show that the variation regulation of the dissipated energy and accumulative energy is compatible with the loading control principle, which proves the feasibility of the method. In addition, the fatigue life of the asphalt mixture in the energy-controlled mode was between that for the stress-controlled and strain-controlled modes. The specimen with a higher RAP content has a longer fatigue life and better fatigue performance.

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Section: Introductionmentioning

confidence: 99%

Fatigue Evaluation of Recycled Asphalt Mixture Based on Energy-Controlled Mode

Cui

Huang

2017

Advances in Materials Science and Engineering

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“…Different contact models between the different particles are present in Table 1. According to the micromechanical parameters in the paper of Feng [21] and Zelelew [13], the model parameters were set based on empirical values [22] and previous experimental results [5,23]. The parameters were also adjusted appropriately to match the experimental results of the indirect tensile test from the laboratory, i.e., peak force and stiffness.…”

Section: Discrete Element Analysis Of the Indirect Tensile Fatigue Testmentioning

confidence: 99%

“…Recently, some researchers have been trying to use a discrete element method (DEM) to analyze the fatigue properties of asphalt mixtures. Ma et al analyzed the impacts of different parameters of air voids on the creep behavior of an asphalt mixture by the DEM [4,5]. Cao et al conducted a two-point bending beam fatigue simulation test with the trapezoidal samples.…”

Section: Introductionmentioning

confidence: 99%

Discrete Element Analysis of Indirect Tensile Fatigue Test of Asphalt Mixture

Liu

et al. 2019

Applied Sciences

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In order to investigate the damage to microstructure and some other micromechanical responses during a fatigue test on asphalt mixture, Particle Flow Code (PFC) was used to reconstruct a two-dimensional discrete element model of asphalt mixture, based on computed tomography (CT) images and image-processing techniques. The indirect tensile fatigue test of asphalt mixture was simulated with this image-based microstructural model, and verified in the laboratory. It was found that there were four stages during the fatigue failure: no crack, crack initiation, crack developing, and interconnected crack. Cracks mainly developed between the aggregate and asphalt mortar, near the loading axis. The corresponding stages of failure, the developing trend and the distribution characteristics of the cracks matched well with those in the laboratory test. Furthermore, the trends of both the time-load curve and time-displacement curve from the simulation test were also consistent with those from the experimental test. In short, the distribution characteristics of cracks and internal forces of asphalt mixture show that it is feasible to simulate the fatigue performance of the asphalt mixture by a discrete element method (DEM). Appl. Sci. 2019, 9, 327 2 of 17 by the DEM [7]. A local discrete element model was established to discuss the damage and cracks caused by the cyclic fatigue load [8]. Yu analyzed the effect of the aggregate packing on the dynamic modulus of an asphalt mixture by the DEM [9]. These achievements mentioned above demonstrate that the DEM is applicable for the research on fatigue characteristics of pavement asphalt mixes. However, the discrete element models of asphalt mixtures are generated by computer algorithms, which are different from the actual microstructures. The distribution characteristics of cracks and internal forces of asphalt mixtures are also seldom described in the indirect tensile fatigue test.Since microstructure images captured by X-ray computed tomography (X-ray CT) can show the internal distribution and composition of the material, CT and the DEM have been widely applied to asphalt mixture together recently. You et al. obtained the images of asphalt mixture samples by the optical scanning, and reconstructed two-dimensional discrete element models based on these optical images [10]. Based on many two-dimensional slices of the same sample, the three-dimensional discrete element model of an asphalt mixture was reconstructed [11,12]. Zelelew et al. described the microstructure of asphalt mixtures obtained by CT and established a two-dimensional discrete element model to predict the creep compliance of uniaxial loading [13]. Zhou investigated the dynamic deformation process of an asphalt mixture based on the image-based discrete element model [14]. Tan believed that image-based discrete element model could provide a potential detailed insight into the failure mechanism of the heterogeneous rocks at the microscopic level [15]. Generally speaking, the asphalt mixture is a non-uniform complex visco...

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“…In this regard, some authors stated that air voids (Va) may be the main source of moisture damage (Terrel and Al-Swailmi, 1994;Varveri et al, 2014). Moreover, higher air void content leads to mixtures with lower fatigue life (Ma et al, 2016) and less durability (Choubane et al, 1998). Additionally, recent investigations concluded that air voids could affect heat transfer (Hassn et al, 2016) and self-healing via induction and infrared heating (Gómez-Meijide et al, 2016).…”

Section: Volumetric Propertiesmentioning

confidence: 99%

Moisture damage resistance of hot-mix asphalt made with recycled concrete aggregates and crumb rubber

Pérez

Pasandín

2017

Journal of Cleaner Production

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To guarantee sustainable construction, we investigated the reuse of construction and demolition waste (CDW) as recycled concrete aggregate (RCA) for the manufacture of hot-mix asphalt (HMA) in place of natural aggregates. The use of waste tire rubber as a bitumen modifier could be a means of improving the water resistance of these mixtures. In this investigation, moisture damage resistance of HMA for binder course, type AC 22 bin S, was analysed. Percentages of 0% (control mixture), 35% and 42% RCA were used in place of natural aggregates. Two types of bitumen have also been used: a conventional B35/50 penetration grade bitumen and BC35/50, a crumb rubber modified bitumen. Volumetric properties and water resistance were determined by means of indirect tensile tests. The results indicate that contrary to expectations, mixtures made with BC35/50 do not display better water resistance than mixtures made with B35/50. Nevertheless, a mixture made with B35/50 or BC35/50 does comply with Spanish requirements. Additionally, reversibility of moisture damage resistance was clearly demonstrated in this research. This research may help to better understand the performance of HMA made with RCA and the drawbacks of using waste tire rubber as a bitumen modifier.

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Influences by air voids on fatigue life of asphalt mixture based on discrete element method

Cited by 64 publications

References 20 publications

Fatigue Evaluation of Recycled Asphalt Mixture Based on Energy-Controlled Mode

Fatigue Evaluation of Recycled Asphalt Mixture Based on Energy-Controlled Mode

Discrete Element Analysis of Indirect Tensile Fatigue Test of Asphalt Mixture

Moisture damage resistance of hot-mix asphalt made with recycled concrete aggregates and crumb rubber

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