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Deyu Zhang

Bio: Deyu Zhang is an academic researcher from Nanjing Institute of Technology. The author has contributed to research in topics: Asphalt & Creep. The author has an hindex of 10, co-authored 19 publications receiving 451 citations. Previous affiliations of Deyu Zhang include Changsha University of Science and Technology.

Papers
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TL;DR: In this paper, the simulation of wheel tracking test and the high-temperature rutting behavior of an asphalt mixture by using the discrete element method (DEM) was investigated.
Abstract: This study investigated the simulation of wheel tracking test and the high-temperature rutting behaviour of an asphalt mixture by using the discrete element method (DEM). Based on the DEM software named as Particle Flow Code in three dimensions (PFC3D), a micromechanical model of an asphalt mixture composed of coarse aggregates, asphalt mastic, and air voids was built and a two-dimensional virtual wheel tracking test was simulated. Based on the virtual wheel tracking test, the distribution of displacement and contact forces within test specimen were analysed. It is proved that the built virtual wheel tracking test can capture the rutting deformation caused by the combination of densification and lateral flow deformation. It is also indicated that, within an asphalt mixture, the aggregate skeleton is the main bearing body for the compressive forces, while the compressive and tensile forces between aggregate and mastic are severer than that within asphalt mastic. It is important to guarantee the stability o...

105 citations

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TL;DR: In this paper, the effects of different parameters related to air voids on the creep behavior of asphalt mixture based on micromechanical modeling and virtual test through three-dimensional discrete element method (DEM).

68 citations

Journal ArticleDOI
TL;DR: In this paper, a three-dimensional micromechanical DEM model for asphalt mixtures was constructed by particle flow code in three dimensions (PFC3D) and verified by laboratory wheel tracking tests to predict the rutting behavior of the asphalt mixture.

67 citations

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TL;DR: In this paper, the performance evaluation of deicing asphalt mixtures with anti-icing additives and proposed a solution to reduce the negative influences of antiicing additives on the engineering properties of asphalt mixture.

66 citations

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TL;DR: Based on laboratory tests and discrete element method (DEM), Wang et al. as discussed by the authors investigated the influences by mechanical property heterogeneity of different ingredients of asphalt mixture on the creep behavior of asphalt mixtures.

65 citations


Cited by
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Journal ArticleDOI
TL;DR: In this article, a superhydrophobic/electrothermal synergistically anti-icing strategy based on graphene composite was introduced, which could solve the re-freeze problem as the melted ice tend to stay on the surface is still a challenge.

189 citations

Journal ArticleDOI
Xunhao Ding1, Luchuan Chen, Tao Ma1, Haixia Ma, Gu Linhao1, Tian Chen1, Ma Yuan1 
TL;DR: In this article, the performance of the recycled asphalt concrete with stable crumb rubber asphalt (SCRA) binder was investigated and the results indicated that the rejuvenator has a positive effect on the low-temperature performance, moisture stability and fatigue resistance.

167 citations

Journal ArticleDOI
TL;DR: In this paper, a review of the existing rutting solutions and test methods for asphalt pavement is presented, which is expected to provide an overall insight on the existing solutions and recommend future studying areas relevant to the problem of permanent deformation of asphalt pavement.

144 citations

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TL;DR: In this article, a comparative review of the recycled polymers most commonly studied as bitumen modifiers: polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), ethyl vinyl acetate (EVA), and ground tire rubber (GTR) is presented.
Abstract: The use of polymer-modified binders in asphalt mixtures has become more widespread due to their reduced thermal susceptibility and improved rutting and fatigue resistance. Nevertheless, their high cost limits their application, thus making the use of reclaimed polymers (RP) an interesting alternative for both reducing price and extending the service life of pavements. This paper; therefore, presents a comparative review of the recycled polymers most commonly studied as bitumen modifiers: polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), ethyl vinyl acetate (EVA), and ground tire rubber (GTR), in order to facilitate their selection and extend the use of the bitumen. The differences in terms of melting point, mixing conditions, and maximum quantity of added polymer are analyzed. Moreover, their effect on the mechanical behavior of the asphalt binders and their stability with and without the use of additives is presented. According to the literature revision, the performance of the new binder is more influenced by the kind of polymer that was incorporated and the mixing conditions than by the base bitumen that was chosen, although rheological evaluation is needed to fully understand the modification mechanisms of the modified binder. In general terms, plastomers have a stronger effect in terms of increasing the stiffness of the bitumen in comparison with crumb rubber (elastomers), thus providing an improved rutting resistance. The joint use of polyethylene (plastomer) and crumb rubber (elastomer) can be an interesting option for its recycling potential and mechanical performance, although further study is needed to achieve stable bitumen across the entire range of temperatures; additives, such as maleic anhydride (MA), are commonly employed to improve the stability of the binder and enhance its characteristics, but their use could limit the economic benefits of using recycled materials.

122 citations

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TL;DR: In this paper, a combined experimental and numerical approach is proposed for the characterisation of the mechanical behaviour of foamed geopolymer concretes, and the results show that the air void distribution has a significant influence on the compressive strength of the material, while the micro-void structure has less effect on the loading bearing capacity.

114 citations