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学者姓名：薛斌
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Abstract ：
To investigate the effects of ionic emulsifiers on the stabilization of emulsified asphalt, this paper used the Materials Studio software package to model a two-layer structure consisting of asphalt-emulsifier-water-emulsifier-asphalt. The principles of molecular dynamics were used to simulate the emulsified asphalt solution with various types of ionic emulsifier molecules. The effects of the anionic (SDS)/cationic (CTAB) emulsifiers on the stability of the emulsified asphalt were studied and compared. The following performance metrics were investigated: the interfacial monolayer morphology of the emulsifier molecules; the interaction energy between the emulsifier molecules and the water molecules; and the interaction energy between the emulsifier molecules and the asphalt phase/water phase. The results showed that, compared with CTAB emulsifier molecules, SDS emulsifier molecules had a higher extent of aggregation in the emulsified asphalt model system. The binding ability between the SDS emulsifier and the water molecules was stronger than that of the CTAB emulsifier molecules and negatively affects the stability of emulsified asphalt. Compared with the CTAB emulsified asphalt system, the SDS emulsified asphalt system has higher binding energy. In general, the stability of the CTAB-emulsified asphalt system is better than that of the SDS-emulsified asphalt system.
Keyword ：
Electrostatic potential Electrostatic potential Emulsified asphalt Emulsified asphalt Emulsifier Emulsifier Molecular simulation Molecular simulation Stability Stability
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| GB/T 7714 | Yuan, Yan , Chen, Hongyu , Wang, Yefei et al. Effect of Ionic Emulsifiers on the Stability of Emulsified Asphalt Based on Molecular Dynamics Simulation [J]. | JOURNAL OF MATERIALS IN CIVIL ENGINEERING , 2025 , 37 (3) . |
| MLA | Yuan, Yan et al. "Effect of Ionic Emulsifiers on the Stability of Emulsified Asphalt Based on Molecular Dynamics Simulation" . | JOURNAL OF MATERIALS IN CIVIL ENGINEERING 37 . 3 (2025) . |
| APA | Yuan, Yan , Chen, Hongyu , Wang, Yefei , Xu, Song , Xue, Bin . Effect of Ionic Emulsifiers on the Stability of Emulsified Asphalt Based on Molecular Dynamics Simulation . | JOURNAL OF MATERIALS IN CIVIL ENGINEERING , 2025 , 37 (3) . |
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[目标]完善现有沥青路面智能压实质量评价方法和指标.[方法]采用加速度传感和定位系统构建沥青路面智能压实系统,提出适用于沥青路面的纵向分区碾压方案.在分析计算加速度信号得到振动,压实值的基础上,建立振动压实值与沥青路面压实度的关系模型,并提出标准偏移率、最近邻点指数及变异系数指标,对沥青路面压实质量进行全面评价.[结果]随着压实次数的增多,振动压实值的均值变化幅度逐渐减小,沥青路面最大压实次数可参考振动压实值的变化.振动压实值与沥青路面压实度之间具有较好相关性,相关系数为0.72.[结论]标准偏移率考虑不合格区域的振动压实值与目标值的差值大小,最近邻点指数考虑不合格区域的分散程度,变异系数考虑不合格区域的变化幅度,三者分别适用于评价沥青路面压实程度、均匀程度及稳定程度的压实质量,优化了现有的沥青路面智能压实质量评价方法.
Keyword ：
压实质量评价 压实质量评价 振动压实值 振动压实值 智能压实 智能压实 沥青路面 沥青路面 道路工程 道路工程
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| GB/T 7714 | 许家璐 , 薛斌 , 阙云 et al. 沥青路面智能压实监测及质量评价方法 [J]. | 公路交通科技 , 2025 , 42 (4) : 48-56 . |
| MLA | 许家璐 et al. "沥青路面智能压实监测及质量评价方法" . | 公路交通科技 42 . 4 (2025) : 48-56 . |
| APA | 许家璐 , 薛斌 , 阙云 , 牟宏霖 . 沥青路面智能压实监测及质量评价方法 . | 公路交通科技 , 2025 , 42 (4) , 48-56 . |
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Purpose The macropore structure and seepage characteristics profoundly influence the stability of granite residual soil (GRS) slopes. However, accurately predicting the permeability of undisturbed GRS (U-GRS) is challenging owing to its complex and susceptible pore structure. Aims and methods Employing X-ray computed tomography (CT) technologies, a three-dimensional (3D) pore structure of U-GRS, was established. Permeability prediction for U-GRS samples was conducted using three simulation methods, namely, the pore network model (PNM), finite element method (FEM), and the lattice Boltzmann method (LBM), along with two empirical models (EMs)-specifically, Kozeny-Carman (K-C) and Katz-Thompson (K-T) models. Subsequently, the methods were comparatively analyzed for calculating efficiency and accuracy. Finally, a piecewise permeability prediction model (PPPM) for U-GRS based on the CT-LBM was proposed. Results The ranking of permeability estimation methods in terms of accuracy was as follows: LBM > PNM > FEM > EMs. Substantial disparity was observed in the permeabilities obtained using both FEM and EMs compared to other methods, which exhibited a deviation of up to six orders of magnitude. The PPPM demonstrated smaller prediction deviations than the EMs, with its accuracy influenced by the strategy for selecting calculation parameters. Conclusion The CT-LBM, which uses real pore structures, was employed to estimate the permeability of U-GRS. The PPPM, established based on this method, was found to be applicable for estimating U-GRS permeability.
Keyword ：
Comparative analysis Comparative analysis Granite residual soil Granite residual soil Macropore Macropore Permeability model Permeability model X-ray computed tomography images X-ray computed tomography images
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| GB/T 7714 | Que, Yun , Chen, Xian , Jiang, Zhenliang et al. Pore-scale permeability estimation of undisturbed granite residual soil: A comparison study by different methods [J]. | JOURNAL OF SOILS AND SEDIMENTS , 2024 . |
| MLA | Que, Yun et al. "Pore-scale permeability estimation of undisturbed granite residual soil: A comparison study by different methods" . | JOURNAL OF SOILS AND SEDIMENTS (2024) . |
| APA | Que, Yun , Chen, Xian , Jiang, Zhenliang , Cai, Peichen , Xue, Bin , Xie, Xiudong . Pore-scale permeability estimation of undisturbed granite residual soil: A comparison study by different methods . | JOURNAL OF SOILS AND SEDIMENTS , 2024 . |
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To improve the predictive ability of existing models for predicting the compaction density of asphalt pavement，a test site was set up on the upper layer of the Xiang’an Airport Highway Project in Xiamen. The CCV，DMV and VCV，which represent the change of harmonic ratio，energy，and mechanics in the vibration and compression process，respectively，as well as the temperature，were chosen as indicators. The isolation forest algorithm was used to detect outliers in indicators. The density prediction model was established based on the partial least squares regression. The results show that the isolation forest can effectively recognize outliers of high-dimensional data，covering the shortage that traditional methods can only process one-dimensional data. There are different degrees of positive correlation between temperature，other indicators，and asphalt pavement density. The multiple regression model based on CCV，DMV，and VCV obtains better fitting ability than the unitary regression methods，proving the feasibility of multiple indicators. The partial least squares regression can restrain the adverse impact caused by the approximate collinearity between independent variables，correct the incorrect weight of temperature，and improve the fitting degree compared with the common multiple linear regression methods. The final determination coefficient of the model on the training set is 0.83，and on the test set is 0.81，indicating good predictive ability for asphalt pavement density. © 2024 Hunan University. All rights reserved.
Keyword ：
Asphalt Asphalt Asphalt pavements Asphalt pavements Compaction Compaction Multiple linear regression Multiple linear regression
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| GB/T 7714 | Que, Yun , Dai, Yi , Xue, Bin et al. Intelligent Compaction Density Prediction Model of Asphalt Pavement Based on Multiple Indicators [J]. | Journal of Hunan University Natural Sciences , 2024 , 51 (11) : 147-157 . |
| MLA | Que, Yun et al. "Intelligent Compaction Density Prediction Model of Asphalt Pavement Based on Multiple Indicators" . | Journal of Hunan University Natural Sciences 51 . 11 (2024) : 147-157 . |
| APA | Que, Yun , Dai, Yi , Xue, Bin , Zhang, Chanlin , Mu, Honglin , Yuan, Yan . Intelligent Compaction Density Prediction Model of Asphalt Pavement Based on Multiple Indicators . | Journal of Hunan University Natural Sciences , 2024 , 51 (11) , 147-157 . |
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To investigate the different effects of different ionic emulsifiers on the stability of emulsified asphalt，based on molecular dynamics simulation， the double-layer model structure of 'asphalt-emulsifier-water-emulsifier-asphalt'was constructed by using Materials Studio software，and emulsified asphalt systems containing different ionic emulsifier molecules were simulated to compare the effect of anionic （SDS）/cationic （CTAC）emulsifiers on the stability of emulsified asphalt. The changes in the relative concentration distribution，interfacial film thickness，interfacial formation energy，and electrostatic potential （ESP） of the asphalt emulsions were compared with the addition of different emulsifier molecules in order to analyze the stability of the emulsified asphalt. The results show that the SDS emulsifier increases the thickness of the interfacial layer between asphalt and water，reduces the interfacial tension between the two phases，and improves the stability of the emulsified asphalt，compared with the CTAC emulsifier. From the perspective of electrostatic potential analysis，compared with CTAC emulsifier，SDS emulsifier molecule has a larger maximum electrostatic potential of the alkane chain，and it is more likely to bond with atoms with negative electrostatic potential. Therefore，the overall stability of emulsified asphalt with an SDS emulsifier is better than that of emulsified asphalt with a CTAC emulsifier. © 2024 Hunan University. All rights reserved.
Keyword ：
Asphalt Asphalt Computer software Computer software Electrostatics Electrostatics Emulsification Emulsification Molecular dynamics Molecular dynamics Molecules Molecules Stability Stability
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| GB/T 7714 | Yuan, Yan , Chen, Hongyu , Wang, Yefei et al. Molecular Simulation on Effect of Ionic Emulsifiers on Stability of Emulsified Asphalt [J]. | Journal of Hunan University Natural Sciences , 2024 , 51 (3) : 51-58 . |
| MLA | Yuan, Yan et al. "Molecular Simulation on Effect of Ionic Emulsifiers on Stability of Emulsified Asphalt" . | Journal of Hunan University Natural Sciences 51 . 3 (2024) : 51-58 . |
| APA | Yuan, Yan , Chen, Hongyu , Wang, Yefei , Xu, Song , Xue, Bin . Molecular Simulation on Effect of Ionic Emulsifiers on Stability of Emulsified Asphalt . | Journal of Hunan University Natural Sciences , 2024 , 51 (3) , 51-58 . |
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To investigate the influence of macropore parameters on the non-uniform migration and stability of slopes under rainfall, a solution model was developed based on the two-domain model and the stability coefficient field principle. This model addressed non-uniform flow and slope stability under rainfall infiltration. Using the COMSOL Multiphysics finite element platform, a corresponding model solving program was created. The numerical results were validated through indoor rainfall tests on macropore soil columns. A comparison was made between slope volume water content and point stability coefficient under conditions of uniform and non-uniform flow. Subsequently, the impact of macropore parameters (namely, the proportion of macropore domain ωf, the ratio of water conductivity between macropore and matrix domain μ, and the macropore empirical parameter rw) on slope seepage field and stability coefficient field was analyzed. The findings revealed that compared to scenarios without macropores, considering macropores led to a 7.7% increase in volume water content in the matrix domain and a 5.1% decrease in the macropore domain. Additionally, infiltration depth increased by 83.3% and 150.0%, respectively, and the shallow instability area of the slope expanded by 3.9%. Infiltration depth decreased with an increase in ωf for both the matrix and macropore domains. Conversely, with an increase in μ, infiltration depth decreased for the matrix domain and increased for the macropore domain. There was no significant relationship observed with the empirical parameter rw. At the end of the rainfall, volume water content in the matrix domain peaked, while the macropore domain increased with higher values of ωf and μ, showing minimal impact from the empirical parameter rw. Water exchange was categorized into negative exchange area, positive exchange area, and no exchange area along the profile. The equilibrium depth of water exchange aligned with the change in infiltration depth of the matrix domain. Both the negative and positive exchange areas exhibited peak values that decreased with higher ωf and increased with higher μ and rw values. Under varying parameter values, the slope experienced shallow instability failures. Higher values of ωf and μ corresponded to deeper instability layers and lower point stability coefficients, indicating that macropores were detrimental to slope stability. © 2024 Sichuan University. All rights reserved.
Keyword ：
Infiltration Infiltration Rain Rain Slope stability Slope stability
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| GB/T 7714 | Que, Yun , Li, Shanghui , Zhan, Xiaojun et al. Influence of Macropore Parameters on Slope Non-uniform Flow and Stability [J]. | Advanced Engineering Sciences , 2024 , 56 (3) : 122-133 . |
| MLA | Que, Yun et al. "Influence of Macropore Parameters on Slope Non-uniform Flow and Stability" . | Advanced Engineering Sciences 56 . 3 (2024) : 122-133 . |
| APA | Que, Yun , Li, Shanghui , Zhan, Xiaojun , Zhang, Jisong , Xue, Bin , Xie, Xiudong . Influence of Macropore Parameters on Slope Non-uniform Flow and Stability . | Advanced Engineering Sciences , 2024 , 56 (3) , 122-133 . |
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Asphalt mixture is a typical granular material, and its macroscopic properties are closely related to the interaction behavior of aggregate particles at the micro scales. Discrete element method (DEM), as an important numerical simulation method in granular mechanics, plays an increasingly important role in analyzing the aggregate packing characteristics, skeleton features, predicting mechanical and pavement performance of asphalt mixtures. However, the complexity of the composition of asphalt mixtures, including the particle size, shape, spatial distribution of aggregate particles, and the viscoelasticity of asphalt binders sensitive to temperature, load, and time, increases the difficulty of constructing DEM models of asphalt mixtures, selecting contact constitutive models, and determining parameters, which directly affects the accuracy and efficiency of DEM simulations. In this review, the generation methods of idealized models, image models, and user-defined models currently used to generate DEM models of asphalt mixtures were summarized in detail. Conventional contact constitutive models, including elastic and viscoelastic contact stiffness constitutive models, as well as fracture models including bonding models and cohesive softening models, were discussed. Moreover, special contact constitutive models, such as damage, self-healing, and two-stage contact models considering compaction evolution, were also summarized and discussed. Then, the contact constitutive model parameters were classified and related determination methods were summarized, and the latest application directions of DEM in current asphalt mixture research were classified. On this basis, relevant discussions were carried out, and the challenges and future development prospects faced by DEM in asphalt mixture research were proposed.
Keyword ：
Application Application Asphalt mixture Asphalt mixture Contact constitutive model Contact constitutive model Discrete element method Discrete element method Model generation method Model generation method
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| GB/T 7714 | Xue, Bin , Que, Yun , Pei, Jianzhong et al. A state-of-the-art review of discrete element method for asphalt mixtures: Model generation methods, contact constitutive models and application directions [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2024 , 414 . |
| MLA | Xue, Bin et al. "A state-of-the-art review of discrete element method for asphalt mixtures: Model generation methods, contact constitutive models and application directions" . | CONSTRUCTION AND BUILDING MATERIALS 414 (2024) . |
| APA | Xue, Bin , Que, Yun , Pei, Jianzhong , Ma, Xiaoyan , Wang, Di , Yuan, Yan et al. A state-of-the-art review of discrete element method for asphalt mixtures: Model generation methods, contact constitutive models and application directions . | CONSTRUCTION AND BUILDING MATERIALS , 2024 , 414 . |
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为提高现有沥青路面压实密度预测模型预测能力,以厦门翔安机场高速公路的路面段为试验场地,选取分别代表振压过程中谐波比、能量和力学变化的压实控制值CCV、耗散测量值DMV、振动压实值VCV以及温度作为监测指标,采用孤立森林算法进行监测指标异常点识别,基于最小偏二乘回归建立多指标沥青路面压实密度预测模型.结果表明:孤立森林算法可有效识别高维数据异常点,弥补传统方法只能处理一维数据的不足;温度与其他监测指标以及沥青路面密度存在不同程度正相关关系;基于CCV、DMV、VCV的多元回归模型拟合性能优于一元回归模型性能,论证了多指标评价方法可行性;最小偏二乘回归可改善自变量间共线性对模型权重的影响,解决温度权重与实际物理意义相互颠倒的问题;相比普通多元线性回归,最小偏二乘回归能进一步提高模型拟合能力,模型最终在训练集上的决定系数为0.83,在测试集上的决定系数为0.81,具有良好的沥青路面压实密度预测能力.
Keyword ：
孤立森林 孤立森林 智能压实 智能压实 智能压实测量值 智能压实测量值 最小偏二乘回归 最小偏二乘回归 沥青路面 沥青路面
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| GB/T 7714 | 阙云 , 戴伊 , 薛斌 et al. 沥青路面压实密度多指标智能预测模型 [J]. | 湖南大学学报（自然科学版） , 2024 , 51 (11) : 147-157 . |
| MLA | 阙云 et al. "沥青路面压实密度多指标智能预测模型" . | 湖南大学学报（自然科学版） 51 . 11 (2024) : 147-157 . |
| APA | 阙云 , 戴伊 , 薛斌 , 章灿林 , 牟宏霖 , 袁燕 . 沥青路面压实密度多指标智能预测模型 . | 湖南大学学报（自然科学版） , 2024 , 51 (11) , 147-157 . |
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针对沥青路面智能压实振动加速度信号噪声问题,采用小波变换和自适应噪声完全集合经验模态分解对加速度信号进行降噪;通过各信号分量的模态混叠程度、信号时频图、信噪比,以及智能压实测量值的变化对比两种方法的降噪效果,建立降噪前后智能压实测量值与压实度的关系模型.研究表明:两种降噪方法均可抑制信号中的高频噪声和毛刺现象,但自适应噪声完全集合经验模态分解能更好地减弱模态混叠现象;降噪后信号的信噪比更大,降噪效果更佳,且可减轻智能压实测量值随着振压次数变化的重叠现象,提升其与压实度的相关性.对比降噪后的压实控制值(CCV)和振动压实值(VCV)两种智能压实测量值,CCV能更好地反映出不同振压次数和温度下的压实度变化,更适用于沥青路面智能压实质量监测.
Keyword ：
智能压实 智能压实 沥青路面 沥青路面 道路工程 道路工程 降噪方法 降噪方法
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| GB/T 7714 | 许家璐 , 薛斌 , 阙云 . 沥青路面智能压实加速度信号降噪方法 [J]. | 福州大学学报（自然科学版） , 2024 , 52 (6) : 698-707 . |
| MLA | 许家璐 et al. "沥青路面智能压实加速度信号降噪方法" . | 福州大学学报（自然科学版） 52 . 6 (2024) : 698-707 . |
| APA | 许家璐 , 薛斌 , 阙云 . 沥青路面智能压实加速度信号降噪方法 . | 福州大学学报（自然科学版） , 2024 , 52 (6) , 698-707 . |
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Based on molecular dynamics, modelling and analysis of the state of salt-free ionic emulsified asphalt system with the addition of calcium ions and magnesium ions (Ca2+and Mg2+, respectively). The effect of calcium and magnesium ions on the stability of sodium dodecyl sulfate (SDS)-emulsified asphalt was investigated. To determine the effect of the metal cations on the stability of anionic emulsified asphalt, the interfacial morphological distribution, interaction of the emulsifier with water molecules, and mobility of water molecules in the emulsifier head group/metal cations was investigated. The results of the simulation analysis show that, compared to a salt-free environment, the addition of Ca2+ or Mg2+ to a salt-containing system induces aggregation between the head groups of the SDS emulsifier molecules and reduces the thickness of the SDS emulsifier headgroup distribution along the Z-axis. This, in turn, weakens the stability of the anionic emulsified asphalt. Compared to the Ca2+-emulsified asphalt system, the Mg2+-emulsifier headgroup molecules are more easily bound to water molecules and more difficult to dissociate from them. Thus, the addition of Mg2+ is more likely to reduce the stability of the emulsion. Furthermore, the results of the simulated data analysis indicate that the addition of cations to the emulsified asphalt system, particularly Mg2+, reduces the mobility of the water molecules surrounding the head group, thereby reducing the stability of the emulsion. The results of the molecular simulations are consistent with the experimental results in the literature. Thus, the validity of using molecular dynamics to analyze the effect of metal cations on anionic emulsified asphalt was verified.
Keyword ：
Anionic emulsified asphalt Anionic emulsified asphalt Cation Cation Interaction energy Interaction energy Molecular dynamics Molecular dynamics Stability Stability
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| GB/T 7714 | Yuan, Yan , Chen, Hongyu , Wang, Yefei et al. How calcium and magnesium ions affect the stability of asphalt with anionic emulsifiers: A molecular dynamics study [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2023 , 400 . |
| MLA | Yuan, Yan et al. "How calcium and magnesium ions affect the stability of asphalt with anionic emulsifiers: A molecular dynamics study" . | CONSTRUCTION AND BUILDING MATERIALS 400 (2023) . |
| APA | Yuan, Yan , Chen, Hongyu , Wang, Yefei , Xu, Song , Xue, Bin , Zou, Guilian et al. How calcium and magnesium ions affect the stability of asphalt with anionic emulsifiers: A molecular dynamics study . | CONSTRUCTION AND BUILDING MATERIALS , 2023 , 400 . |
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