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Dr. Changhong Zhou
Pavement Engineering, School of Transportation and Logistics, Dalian University of Technology, Dalian 116023, China

Basic Info


Research Keywords & Expertise

0 Microstructure and performance of pavement materials
0 GPU-based parallel computing of granular materials
0 Polymer-modified asphalt binder
0 Climate and disaster risk assessment of road facilities
0 Testing instrument and software development

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Journal article
Published: 27 May 2019 in Engineering Fracture Mechanics
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Load-induced top-down cracking is one of the major types of asphalt pavement deterioration; however, its initiation mechanisms have not been fully understood so far, which makes it very difficult to effectively consider this failure pattern in the pavement design procedures. To address this issue, the present study developed a two-dimensional microstructure-based multiscale finite element model, in which material properties on two physical length scales, i.e., the local (mixture level) and global (pavement level) scales, were incorporated in the computation and linked through a homogenization process. A digital image processing (DIP) technology was employed to develop the two-dimensional local-scale representative volume element (RVE) model that considered the realistic heterogeneous microstructure of asphalt concrete (AC), and a bilinear cohesive zone model was applied to simulating the local-scale damage initiation and evolution in the RVEs. Two typical pavement structures, with cement-treated base (CTB) and granular base (GB) respectively, were taken into account to interpret the influence of the global-scale pavement configurations on top-down cracking performance. The results showed that the significant near-surface transverse tensile stress just outside the tire edge could be the primary cause of the top-down cracking. For the pavement with CTB, the top-down cracking was the predominant type of fatigue failure, whereas for the pavement with GB, the bottom-up cracking was the main pattern of fatigue failure. Besides, as the temperature increased, more damage was induced under the same traffic loading due to the reduced tensile strength of AC. It was also found on the local scale that the significant tensile stress within the mortar matrix phase probably acted as the driving force of the microcrack initiation and propagation and the effects of the shear traction on the damage evolution in the AC layer increased with the temperature.

ACS Style

Yiren Sun; Cong Du; Changhong Zhou; Xiaoxu Zhu; Jingyun Chen. Analysis of load-induced top-down cracking initiation in asphalt pavements using a two-dimensional microstructure-based multiscale finite element method. Engineering Fracture Mechanics 2019, 216, 106497 .

AMA Style

Yiren Sun, Cong Du, Changhong Zhou, Xiaoxu Zhu, Jingyun Chen. Analysis of load-induced top-down cracking initiation in asphalt pavements using a two-dimensional microstructure-based multiscale finite element method. Engineering Fracture Mechanics. 2019; 216 ():106497.

Chicago/Turabian Style

Yiren Sun; Cong Du; Changhong Zhou; Xiaoxu Zhu; Jingyun Chen. 2019. "Analysis of load-induced top-down cracking initiation in asphalt pavements using a two-dimensional microstructure-based multiscale finite element method." Engineering Fracture Mechanics 216, no. : 106497.

Geotechnical engineering
Published: 30 November 2018 in KSCE Journal of Civil Engineering
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The angularity of particles has important effects on the mechanical properties of asphalt mixture and other granular materials. To simulate these effects, the glue-sphere method was usually used to create an arbitrary polyhedron particle. Unlike other studies, this paper aims to efficiently fill a polyhedron with as few spheres as possible through optimization technology in order to reduce the cost of calculation during mixture simulation. Four contents are mainly discussed here: a) how to produce non-spherical aggregates and control their sizes with the minimal bounding box; b) how to fill convex non-spherical particles with the fewest balls as possible using the constrained nonlinear optimization method; c) how to compute the typical shape factors of these particles; and d) how the control parameters affect the filling effect. The algorithm for this study was programmed by MATLAB software and was proven to have better filling performance and less computational cost compared to other methods.

ACS Style

Changhong Zhou; Hongzhi Yue; Yuhua Li; Miaomiao Zhang; Jiayin Liu; Shahroz Aijaz. A Sphere Filling Algorithm for Irregular Aggregate Particle Generation based on Nonlinear Optimization Method. KSCE Journal of Civil Engineering 2018, 23, 120 -129.

AMA Style

Changhong Zhou, Hongzhi Yue, Yuhua Li, Miaomiao Zhang, Jiayin Liu, Shahroz Aijaz. A Sphere Filling Algorithm for Irregular Aggregate Particle Generation based on Nonlinear Optimization Method. KSCE Journal of Civil Engineering. 2018; 23 (1):120-129.

Chicago/Turabian Style

Changhong Zhou; Hongzhi Yue; Yuhua Li; Miaomiao Zhang; Jiayin Liu; Shahroz Aijaz. 2018. "A Sphere Filling Algorithm for Irregular Aggregate Particle Generation based on Nonlinear Optimization Method." KSCE Journal of Civil Engineering 23, no. 1: 120-129.

Journal article
Published: 20 November 2018 in Applied Sciences
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Low temperature asphalt (LTA) technologies, such as warm-mixed asphalt mixes, are utilized in the paving industry to lower energy demands and greenhouse gas emissions during asphalt mixing and pavement construction. However, the asphalt mixes developed that incorporate LTA additives are more sensitive than hot-mixed asphalts to temperature reduction during compaction, which leads to inadequate compaction and subsequent poor pavement performance. The induction heating-assisted compaction of pavement structures appears to be an effective way to ameliorate such issues and to improve mix compactability at lower temperatures. Considering that induction-assisted compaction is a complex process, a computational methodology is proposed in this paper. A porous asphalt concrete mix was considered as case material. For the pavement compaction analyses after induction, the temperature field generated by electromagnetic induction was predicted and the material parameters of asphalt mortar were adjusted. The effect of induction heating on asphalt compaction effectiveness, the tendency of mix density changing, the increase in compactor passes, and the influence of temperature on compaction at different locations in the pavement were studied as well.

ACS Style

Changhong Zhou; Xueyan Liu; Panos Apostolidis; A. (Tom) Scarpas; Liang He. Induction Heating-Assisted Compaction in Porous Asphalt Pavements: A Computational Study. Applied Sciences 2018, 8, 2308 .

AMA Style

Changhong Zhou, Xueyan Liu, Panos Apostolidis, A. (Tom) Scarpas, Liang He. Induction Heating-Assisted Compaction in Porous Asphalt Pavements: A Computational Study. Applied Sciences. 2018; 8 (11):2308.

Chicago/Turabian Style

Changhong Zhou; Xueyan Liu; Panos Apostolidis; A. (Tom) Scarpas; Liang He. 2018. "Induction Heating-Assisted Compaction in Porous Asphalt Pavements: A Computational Study." Applied Sciences 8, no. 11: 2308.

Original articles
Published: 11 October 2017 in Road Materials and Pavement Design
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In order to study the effects of aggregate shape on the strength of mixtures, the glue-sphered ellipsoid particles were used to create cylinder samples, and triaxial tests were simulated using the discrete element method. This paper discussed (a) how to create ellipsoid aggregates by glued spheres and control its size; (b) how to simulate the triaxial performance of hot-mix asphalt (HMA) skeleton; and (c) how to choose coarse aggregates for HMA according to shape factors. Through computation, a nephogram of triaxial strength varying with shape factors Flatness and Elongation was finally obtained. The results showed that cubical and part of rod aggregate work much better in strength than others, which were proved to be consistent with that of experimental results.

ACS Style

Changhong Zhou; Miaomiao Zhang; Yuhua Li; Jiale Lu; Jingyun Chen. Influence of particle shape on aggregate mixture’s performance: DEM results. Road Materials and Pavement Design 2017, 20, 399 -413.

AMA Style

Changhong Zhou, Miaomiao Zhang, Yuhua Li, Jiale Lu, Jingyun Chen. Influence of particle shape on aggregate mixture’s performance: DEM results. Road Materials and Pavement Design. 2017; 20 (2):399-413.

Chicago/Turabian Style

Changhong Zhou; Miaomiao Zhang; Yuhua Li; Jiale Lu; Jingyun Chen. 2017. "Influence of particle shape on aggregate mixture’s performance: DEM results." Road Materials and Pavement Design 20, no. 2: 399-413.

Journal article
Published: 01 October 2016 in Construction and Building Materials
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Porous asphalt pavement is defined as an asphalt concrete with air voids content of around 20% and capable of forming drainage channels inside the mixture. It consists of an open-graded asphalt mixture composed predominantly of embedded-occluded single-sized macadam from interlocking processes, and is also known as porous asphalt mixture. In China, Marshall Design Method for porous asphalt mixture is the most widely used mixture design method for laboratory experimental study at present. The main parameters of Marshall Design Method are compaction work (number of compactions) and compaction temperature, i.e. this method can work out the air voids content meeting the performance requirements under uniform standard compaction work and given range of compaction temperature in practice. However, on account of different climates and traffic volumes, the molding parameters of Marshall Design shall be adjusted correspondingly to satisfy the pavement performance of mixture. For this purpose, limestone, which is of relatively low strength, is used as aggregate in porous asphalt mixture for experimental study, and the feasibility of limestone used in porous asphalt is also analyzed and verified. By analyzing the influences of Marshall molding parameters (compaction temperature and number of compactions) on the air voids content of porous asphalt mixture, the ranges of molding parameters of Marshall Design Method suitable for porous asphalt using limestone as coarse aggregate is found. Through analyzing the influence rules of Marshall molding parameters (compaction temperature and number of compactions) on the properties of porous asphalt mixture (high temperature stability, water stability and low temperature stability), combining with the ranges of molding parameters calculated with air voids content, the molding parameters for the Marshall test specimen applicable to the limestone porous asphalt mixture in Chinese region is proposed.

ACS Style

Bin Xu; Jingyun Chen; Changhong Zhou; Weiying Wang. Study on Marshall Design parameters of porous asphalt mixture using limestone as coarse aggregate. Construction and Building Materials 2016, 124, 846 -854.

AMA Style

Bin Xu, Jingyun Chen, Changhong Zhou, Weiying Wang. Study on Marshall Design parameters of porous asphalt mixture using limestone as coarse aggregate. Construction and Building Materials. 2016; 124 ():846-854.

Chicago/Turabian Style

Bin Xu; Jingyun Chen; Changhong Zhou; Weiying Wang. 2016. "Study on Marshall Design parameters of porous asphalt mixture using limestone as coarse aggregate." Construction and Building Materials 124, no. : 846-854.

Book chapter
Published: 28 July 2014 in Asphalt Pavements
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ACS Style

Jiayin Liu; Jingyun Chen; Yunquan Liu; Changhong Zhou. Inverted pavement versus semi-rigid pavement: Comparison of dynamic response in field test via mobile loading simulator. Asphalt Pavements 2014, 1115 -1123.

AMA Style

Jiayin Liu, Jingyun Chen, Yunquan Liu, Changhong Zhou. Inverted pavement versus semi-rigid pavement: Comparison of dynamic response in field test via mobile loading simulator. Asphalt Pavements. 2014; ():1115-1123.

Chicago/Turabian Style

Jiayin Liu; Jingyun Chen; Yunquan Liu; Changhong Zhou. 2014. "Inverted pavement versus semi-rigid pavement: Comparison of dynamic response in field test via mobile loading simulator." Asphalt Pavements , no. : 1115-1123.

Conference paper
Published: 09 July 2007 in International Conference on Transportation Engineering 2007
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A digital image processing technique is used for conventional indirect tensile test of asphalt mixtures, by which non-connect measuring process is realized on the horizontal and vertical deformation of specimen. In this system, the shape and deformation of the specimen are automatically monitored and recorded. Through comparison and Analysis the limitation and superiority of traditional measurement method with the digital image processing technique, it is proved that the latter is more practical. Also, the precision and error of the digital image processing system is tested. It is advanced that Poisson's ratio changes with the stress state of material, and the displacement field of specimen surface at any given time is given in this paper to be used to analyze the local deformation of materials.

ACS Style

Ying-Juan Qiao; Zhe-Ren Wang; Jing-Yun Chen; Chang-Hong Zhou. Digital Image Processing Technique to Indirect Tensile Test of Asphalt Mixtures. International Conference on Transportation Engineering 2007 2007, 1 .

AMA Style

Ying-Juan Qiao, Zhe-Ren Wang, Jing-Yun Chen, Chang-Hong Zhou. Digital Image Processing Technique to Indirect Tensile Test of Asphalt Mixtures. International Conference on Transportation Engineering 2007. 2007; ():1.

Chicago/Turabian Style

Ying-Juan Qiao; Zhe-Ren Wang; Jing-Yun Chen; Chang-Hong Zhou. 2007. "Digital Image Processing Technique to Indirect Tensile Test of Asphalt Mixtures." International Conference on Transportation Engineering 2007 , no. : 1.

Conference paper
Published: 09 July 2007 in International Conference on Transportation Engineering 2007
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In order to analyze dynamical pore water pressure in saturated asphalt concrete pavement, a dynamic Finite Element Method (FEM) is derived by Galerkin Weighted Residual Method, based on Biot's consolidation theory and viscoelastic incremental constitutive equations. Using this FEM scheme, a one-quarter instance of double disk load model is numerated under semi-sinusoidal load and with Burgers viscoelastic constitutive equations to illustrate the spatial distribution and fluctuation of effective stress and pore water pressure according to time. Influences of the two key parameters — permeability coefficient and loading speed on the maximal pore water pressure are emphasized on, and a correlative equation about them is fit.

ACS Style

Changhong Zhou; Zheren Wang; Jingyun Chen; Yingjuan Qiao. Numerical Computation and Analysis on Dynamic Pore Water Pressure in Asphalt Pavement. International Conference on Transportation Engineering 2007 2007, 1 .

AMA Style

Changhong Zhou, Zheren Wang, Jingyun Chen, Yingjuan Qiao. Numerical Computation and Analysis on Dynamic Pore Water Pressure in Asphalt Pavement. International Conference on Transportation Engineering 2007. 2007; ():1.

Chicago/Turabian Style

Changhong Zhou; Zheren Wang; Jingyun Chen; Yingjuan Qiao. 2007. "Numerical Computation and Analysis on Dynamic Pore Water Pressure in Asphalt Pavement." International Conference on Transportation Engineering 2007 , no. : 1.