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Dr. Xu Cai
Guangzhou University

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Research Keywords & Expertise

0 Aggregate Interlock Capacity
0 Pavement
0 Recycled cosntruction and demolition wastes
0 Asphalt mixture
0 Long Term performance

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Asphalt mixture
Pavement

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Journal article
Published: 26 June 2021 in Construction and Building Materials
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The mechanical characteristics, quantity, and distribution of contact interfaces in the composite skeleton of recycled asphalt mixture affect the consistency of deformation of new and old aggregate composite skeleton, further affecting the macroscopic mechanical properties of material. To quantitatively analyze the effect of reclaimed asphalt pavement (RAP) content on the mechanical characteristics of contact interface and shear performance of recycled asphalt mixture, the tangential elastic stiffness of interface of new-new, new-old, and old-old contact types is defined as ksnew-new, ksnew-old, and ksold-old, respectively; interfacial shear tests were carried out for new-new, new-old, and old-old contact types. Digital image technology and statistical analysis were used to obtain the proportion distribution of αnew-new, αnew-old, αold-oldof three aggregate contact types under different RAP contents. Combined with the calculation results of interface tangential elastic stiffness and shear modulus with different RAP contents, an interface tangential elastic stiffness estimation model and a shear modulus calculation model were established, and the rationality of the model was verified. The results show that different interface contact types significantly affected the shear test results. The tangential elastic stiffness of old-old contact type is the highest, 0.3416 × 106 N/m. The tangential elastic stiffness of new-old and new-new contact types are 0.2254 × 106 N/m and 0.0992 × 106 N/m, respectively. The results of contact interface shear test of recycled asphalt mixture with different RAP contents show that the overall trend of shear curve is similar, and the peak value and mean value of shear force do not change consistently with the increase of RAP content. Using the least square mathematical analysis method for overdetermined equation, the goodness-of-fit ofks regression model with different RAP contents is 0.85. There is a good correlation between the shear modulus calculation results and uniaxial penetration test results, and the correlation coefficient is 0.80.

ACS Style

Qiran Zhang; Xu Cai; Kuanghuai Wu; Li Chen; Ruida Zhang; Han Xiao; Hafiz Muhammad Zahid Hassan. Shear performance of recycled asphalt mixture based on contact interface parameter analysis. Construction and Building Materials 2021, 300, 124049 .

AMA Style

Qiran Zhang, Xu Cai, Kuanghuai Wu, Li Chen, Ruida Zhang, Han Xiao, Hafiz Muhammad Zahid Hassan. Shear performance of recycled asphalt mixture based on contact interface parameter analysis. Construction and Building Materials. 2021; 300 ():124049.

Chicago/Turabian Style

Qiran Zhang; Xu Cai; Kuanghuai Wu; Li Chen; Ruida Zhang; Han Xiao; Hafiz Muhammad Zahid Hassan. 2021. "Shear performance of recycled asphalt mixture based on contact interface parameter analysis." Construction and Building Materials 300, no. : 124049.

Journal article
Published: 18 May 2021 in Construction and Building Materials
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The strength and shape of aggregates significantly affect the internal skeleton structure (ISS) of the asphalt mixtures, which affects the service life of asphalt pavement. ISS is a critical factor that decides the load transfer path in the asphalt mixture. To improve the performance of the asphalt mixture, three aggregates Granite, Diabase, and Limestone with different strengths and shapes were used. Two-dimensional image processing was used to acquire the ISS including contact properties, distribution and orientation of aggregates. Marshall, wheel tracking and three-point bending beam tests were carried out to evaluate the relationship between skeleton indexes with mechanical properties. Results indicated that the coarse aggregate voids filling method could obtain mineral gradations with the same volume combinations for the three aggregates. The crushing value, loss-angles value, roundness, and flakiness index have an excellent relationship with contact characteristics, showing that strength and shape significantly affect the ISS of the asphalt mixture. The results of Marshall, rutting, and bending stiffness modulus are consistent with the internal structural index, proving that low-temperature and high-temperature performance of asphalt mixture are directly affected by aggregate contact properties. There is a weak linear relationship of strength parameters with mechanical properties because Diabase is three times stronger than Granite but has a lower performance demonstrating that the strength of aggregate has a minimal effect on the performance and stability of the asphalt mixture. The results obtained in this study could be used to improve the utilization efficiency of aggregate.

ACS Style

Hafiz Muhammad Zahid Hassan; Kuanghuai Wu; Wenke Huang; Sihang Chen; Qiran Zhang; Jiawen Xie; Xu Cai. Study on the influence of aggregate strength and shape on the performance of asphalt mixture. Construction and Building Materials 2021, 294, 123599 .

AMA Style

Hafiz Muhammad Zahid Hassan, Kuanghuai Wu, Wenke Huang, Sihang Chen, Qiran Zhang, Jiawen Xie, Xu Cai. Study on the influence of aggregate strength and shape on the performance of asphalt mixture. Construction and Building Materials. 2021; 294 ():123599.

Chicago/Turabian Style

Hafiz Muhammad Zahid Hassan; Kuanghuai Wu; Wenke Huang; Sihang Chen; Qiran Zhang; Jiawen Xie; Xu Cai. 2021. "Study on the influence of aggregate strength and shape on the performance of asphalt mixture." Construction and Building Materials 294, no. : 123599.

Journal article
Published: 04 May 2021 in Sustainability
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Lane-changing behavior is one of the most common driving behaviors while driving. Due to the complexity of its operation, vehicle collision accidents are prone to occur when changing lanes. Under the environment of vehicle networking, drivers can obtain more accurate traffic information in time, which can be of great help in terms of improving lane-changing safety. This paper analyzes the core factors that affect the safety of vehicles changing lanes, establishes the weight model of influencing factors of lane-changing behavior using the analytic hierarchy process (AHP), and obtains the calculation method of lane-changing behavior factors (LCBFs). Based on the fuzzy reasoning theory, the headway between the lane-changing vehicle and adjacent vehicles in the target lane was examined, and fuzzy logic lane-changing models were established for both situations (i.e., change to the left and change to the right lane). The fuzzy logic lane-changing models were tested via simulation experiments, and the test results showed that the models have a better warning effect on lane changing (LCBF = 1.5), with an accuracy of more than 90%. Thus, the established model in this paper can provide theoretical support for safety warnings when changing lanes and theoretical support for the sustainable development of transportation safety.

ACS Style

Qiang Luo; Xiaodong Zang; Xu Cai; Huawei Gong; Jie Yuan; Junheng Yang. Vehicle Lane-Changing Safety Pre-Warning Model under the Environment of the Vehicle Networking. Sustainability 2021, 13, 5146 .

AMA Style

Qiang Luo, Xiaodong Zang, Xu Cai, Huawei Gong, Jie Yuan, Junheng Yang. Vehicle Lane-Changing Safety Pre-Warning Model under the Environment of the Vehicle Networking. Sustainability. 2021; 13 (9):5146.

Chicago/Turabian Style

Qiang Luo; Xiaodong Zang; Xu Cai; Huawei Gong; Jie Yuan; Junheng Yang. 2021. "Vehicle Lane-Changing Safety Pre-Warning Model under the Environment of the Vehicle Networking." Sustainability 13, no. 9: 5146.

Journal article
Published: 13 October 2020 in Polymers
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The purpose of this study was to investigate the effect of aggregate surface adsorbed water on the adhesive capacity and nanostructure of asphalt-aggregate interfaces at the atomic scale. Molecular dynamics (MD) simulation was performed to measure and analyze the molecular interactions of asphalt binder with calcite and silica. Radial distribution function (RDF) and relative concentration (RC) were applied to characterizing the concentrations and distributions of asphalt components on aggregate surfaces. In addition, debonding energy and adhesion energy were employed to calculate the variations of interface adhesion energy of the asphalt-aggregate system under different conditions. The obtained results illustrated that the water molecules adsorbed onto the surface of weakly alkaline aggregates inhibited the concentration and distribution of asphalt components near the aggregate surface, decreased adhesion energy between asphalt and aggregates, and changed asphalt nanostructure. Especially, when external free water intruded into the interface of the asphalt-calcite system, the adsorbed water interacted with free water and seriously declined the water damage resistance of the asphalt mixture with limestone as an aggregate and decreased the durability of the mixtures. The water adsorbed onto the surface of the acid aggregate negatively affected the asphalt-silica interface system and slightly reduced the water damage resistance of the asphalt mixture.

ACS Style

Wentian Cui; Wenke Huang; Bei Hu; Jiawen Xie; Zhicheng Xiao; Xu Cai; Kuanghuai Wu. Investigation of the Effects of Adsorbed Water on Adhesion Energy and Nanostructure of Asphalt and Aggregate Surfaces Based on Molecular Dynamics Simulation. Polymers 2020, 12, 2339 .

AMA Style

Wentian Cui, Wenke Huang, Bei Hu, Jiawen Xie, Zhicheng Xiao, Xu Cai, Kuanghuai Wu. Investigation of the Effects of Adsorbed Water on Adhesion Energy and Nanostructure of Asphalt and Aggregate Surfaces Based on Molecular Dynamics Simulation. Polymers. 2020; 12 (10):2339.

Chicago/Turabian Style

Wentian Cui; Wenke Huang; Bei Hu; Jiawen Xie; Zhicheng Xiao; Xu Cai; Kuanghuai Wu. 2020. "Investigation of the Effects of Adsorbed Water on Adhesion Energy and Nanostructure of Asphalt and Aggregate Surfaces Based on Molecular Dynamics Simulation." Polymers 12, no. 10: 2339.

Journal article
Published: 11 September 2020 in Molecules
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In this work, the influences of moisture intruded into the asphalt-aggregate interface have been investigated at the atomistic scale. The molecular interactions of asphalt with limestone and granite were studied using molecular dynamics (MD) simulations and the mineral surface components of limestone and granite were detected using the hyperspectral image technique. Relative concentration and radial distribution function (RDF) were employed for the characterization of asphalt component aggregations on aggregates surface. Adhesion work and debonding energy were also evaluated to investigate interface energy variations in asphalt-aggregate systems. MD results showed that the presence of interfacial moisture modified asphalt nanostructure and affected the aggregation state and distribution characteristics of asphalt components near aggregate surface. The study also demonstrated that the external moisture that intruded into the interface of the asphalt-aggregate system can decrease the concentration distribution of the asphalt components with powerful polarity on aggregate surface, reduce the adhesion works of the asphalt-aggregate interface, and decline the water damage resistance of asphalt mixture.

ACS Style

Wentian Cui; Wenke Huang; Zhicheng Xiao; Jiawen Xie; Bei Hu; Xu Cai; Kuanghuai Wu. The Effect of Moisture on the Adhesion Energy and Nanostructure of Asphalt-Aggregate Interface System Using Molecular Dynamics Simulation. Molecules 2020, 25, 4165 .

AMA Style

Wentian Cui, Wenke Huang, Zhicheng Xiao, Jiawen Xie, Bei Hu, Xu Cai, Kuanghuai Wu. The Effect of Moisture on the Adhesion Energy and Nanostructure of Asphalt-Aggregate Interface System Using Molecular Dynamics Simulation. Molecules. 2020; 25 (18):4165.

Chicago/Turabian Style

Wentian Cui; Wenke Huang; Zhicheng Xiao; Jiawen Xie; Bei Hu; Xu Cai; Kuanghuai Wu. 2020. "The Effect of Moisture on the Adhesion Energy and Nanostructure of Asphalt-Aggregate Interface System Using Molecular Dynamics Simulation." Molecules 25, no. 18: 4165.

Journal article
Published: 01 April 2020 in Applied Sciences
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There is still a lack of suitable methods for evaluating pavement functional performance according to the characteristics of real-world environment and traffic. This study developed an acceleration test method based on the Driving Wheel Pavement Analyser (DWPA) to evaluate the anti-sliding properties, anti-stripping properties, and tire–pavement noise of AC-13, SMA-13, and OGFC-13 asphalt mixtures, and MS-1, MS-2, and MS-3 micro-surfacing materials. The results indicate that the OGFC-13 mixture exhibited the largest texture depth, and the SMA-13 mixture exhibited the largest British pendulum number (BPN) at the end of the test. The MS-3 material had the best anti-sliding performance among the micro-surfacing materials. Coarse gradation improved the anti-stripping performance of the micro-surfacing materials. The tire–pavement noise for all materials increased with the increase of wheel repetitions. The OGFC-13 mixture and MS-3 micro-surfacing material exhibited the best and worse noise reduction performance, respectively. The new measurement method for evaluating the pavement surface functional performance was proved to be efficient.

ACS Style

Xu Cai; Duanyi Wang; Jiangmiao Yu. Evaluation of the Functional Performance of Paving Materials Based on the Driving Wheel Pavement Analyzer. Applied Sciences 2020, 10, 2410 .

AMA Style

Xu Cai, Duanyi Wang, Jiangmiao Yu. Evaluation of the Functional Performance of Paving Materials Based on the Driving Wheel Pavement Analyzer. Applied Sciences. 2020; 10 (7):2410.

Chicago/Turabian Style

Xu Cai; Duanyi Wang; Jiangmiao Yu. 2020. "Evaluation of the Functional Performance of Paving Materials Based on the Driving Wheel Pavement Analyzer." Applied Sciences 10, no. 7: 2410.

Journal article
Published: 17 March 2020 in Materials
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Porous asphalt concrete (PAC) has been used to improve the traffic conditions in rainy weather due to its high porosity. Aggregate size and gradation have great impact on the connected pore structure, which ultimately affects the permeability of porous asphalt concrete. In this paper, the topological properties of connective pores including pore area, pore circularity, equivalent pore diameter, and void network of porous asphalt concrete with different nominal maximum aggregate sizes and gradations were analyzed using x-ray computer tomography scans and the image processing technique. It was observed that the maximum aggregate sizes will not have significant effect on the percentage of connected pores to total pores for porous asphalt concrete. Furthermore, the percentage of connected pores to total pores is related to the air void content, but for PAC-13 with 20% target air void content or above, the connectivity does not seem to have a sharp increase. Additionally, porous asphalt concrete with a smaller nominal particle size or lower target air void content seems to generate a more concentrated distribution of Eqdiameter. Moreover, pore circularities for porous asphalt concrete with a maximum aggregate size of 10 mm or above are independent of maximum aggregate sizes. Air void contents ranging from 16% to 21% do not have a significant effect on the voids’ circularity. Furthermore, the branching nodes in porous asphalt concrete with a smaller nominal maximum aggregate size or lower target air void content have a more uniform spatial distribution. However, the percentage of cross-linked number to total node raises as the nominal maximum aggregate size or target air void content increases.

ACS Style

Wenke Huang; Xu Cai; Xiang Li; Wentian Cui; Kuanghuai Wu. Influence of Nominal Maximum Aggregate Size and Aggregate Gradation on Pore Characteristics of Porous Asphalt Concrete. Materials 2020, 13, 1355 .

AMA Style

Wenke Huang, Xu Cai, Xiang Li, Wentian Cui, Kuanghuai Wu. Influence of Nominal Maximum Aggregate Size and Aggregate Gradation on Pore Characteristics of Porous Asphalt Concrete. Materials. 2020; 13 (6):1355.

Chicago/Turabian Style

Wenke Huang; Xu Cai; Xiang Li; Wentian Cui; Kuanghuai Wu. 2020. "Influence of Nominal Maximum Aggregate Size and Aggregate Gradation on Pore Characteristics of Porous Asphalt Concrete." Materials 13, no. 6: 1355.

Journal article
Published: 17 March 2020 in Construction and Building Materials
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This study proposes a mechanical model for the shear modulus of asphalt mixtures based on granular mechanics theory. An aggregate interface shear test is conducted to validate the proposed model with the asphalt mixture particle shear analysis system and a pressure film. Results show that the pressure film can measure accurately the contact area, stress distribution, and total stress of the contact interface. It is demonstrated that more than 65% of the contact area bears only 37.5% of the total load, and the contact interface exhibits an uneven stress distribution. The binder type has a significant influence on the shear force at the contact interface. As the penetration of the asphalt decreases, the softening-point temperature increases; as the rutting factor increases, the tangential elastic stiffness also increases. The proposed mechanical model can distinguish the influences of the binder and gradation on the shear modulus of asphalt mixtures.

ACS Style

Xu Cai; Li Chen; Ruida Zhang; Wenke Huang; Kuanghuai Wu; Xijun Ye. Estimation of shear modulus of asphalt mixture based on the shear strength of the aggregate interface. Construction and Building Materials 2020, 248, 118695 .

AMA Style

Xu Cai, Li Chen, Ruida Zhang, Wenke Huang, Kuanghuai Wu, Xijun Ye. Estimation of shear modulus of asphalt mixture based on the shear strength of the aggregate interface. Construction and Building Materials. 2020; 248 ():118695.

Chicago/Turabian Style

Xu Cai; Li Chen; Ruida Zhang; Wenke Huang; Kuanghuai Wu; Xijun Ye. 2020. "Estimation of shear modulus of asphalt mixture based on the shear strength of the aggregate interface." Construction and Building Materials 248, no. : 118695.

Journal article
Published: 02 January 2020 in Materials
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In recent years, ultra-thin wearing course asphalt mixture has been widely used in the reconstruction of old road surfaces and the functional layer of new road surfaces due to its good road performance. To improve the rutting resistance of ultra-thin wearing course asphalt mixture, this research presents an Ultra-thin Wearing Course-10 (UTWC-10) asphalt mixture with good high-temperature stability and skid resistance based on the Taylor system standard mesh specifications. The Course Aggregate Void Filling (CAVF) method is used to design the UTWC-10 asphalt mixture, which is compared with two other traditional ultra-thin wearing course asphalt mixtures on the basis of different laboratory performance tests. The high-temperature rutting test data shows that the rutting dynamic stability (DS) index of the UTWC-10 asphalt mixture is much higher than that of traditional wearing course asphalt mixtures, as it has better high-temperature stability. Moreover, anti-sliding performance attenuation tests are conducted by a coarse aggregate polishing machine. The wear test results show that the skid resistance of the UTWC-10 asphalt mixture is promising. The anti-sliding performance attenuation test can effectively reflect the skid resistance attenuation trend of asphalt pavement at the long-term vehicle load. It is verified that the designed UTWC-10 asphalt mixture shows excellent high-temperature rutting resistance and skid resistance, as well as better low temperature crack resistance and water stability than the traditional wearing course asphalt mixtures.

ACS Style

Wentian Cui; Kuanghuai Wu; Xu Cai; Haizhu Tang; Wenke Huang. Optimizing Gradation Design for Ultra-Thin Wearing Course Asphalt. Materials 2020, 13, 189 .

AMA Style

Wentian Cui, Kuanghuai Wu, Xu Cai, Haizhu Tang, Wenke Huang. Optimizing Gradation Design for Ultra-Thin Wearing Course Asphalt. Materials. 2020; 13 (1):189.

Chicago/Turabian Style

Wentian Cui; Kuanghuai Wu; Xu Cai; Haizhu Tang; Wenke Huang. 2020. "Optimizing Gradation Design for Ultra-Thin Wearing Course Asphalt." Materials 13, no. 1: 189.

Journal article
Published: 24 October 2019 in Materials
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Semi-flexible pavement (SFP) materials, with their characteristics of good high temperature stability, strong durability, and lower cost, are suitable for heavy-duty roads, but their cracking problem has hindered the development and popularization of this kind of pavement to a certain extent. In this study, engineered cementitious composites (ECC) were used to form ECC-SFP materials. The self-healing properties of ECC-SFP materials with three kinds of voids of matrix asphalt mixtures were studied. The test results showed that the fluidity and strength of the ECC mortars met the specification requirements when the water–cement ratio was 0.23 and the ECC fiber dosage was 1–2%. The flexural strength of ECC mortar is better than that of ordinary mortar. The higher the ECC fiber dosage, the higher the flexural strength. Increasing the void of the matrix asphalt mixture and the amount of ECC mortar increased the toughness of the ECC-SFP material, which was seen as an increase of the flow value. Curing conditions are key factor affecting the self-healing properties of ECC mortar and ECC-SFP materials. The self-healing effect of materials in 60 °C water is the best. When an ECC fiber dosage of 1% was used, the HImor of ECC mortar and HImix of ECC-SFP material were 27.5% and 24.8%, respectively. With the addition of ECC material, ECC-SFP material achieved a certain degree of self-healing, but this still needs to be further optimized. Studies of grouting process optimization and increasing the ECC fiber dosage are feasible directions to explore in order to improve the self-healing properties of ECC-SFP materials in the future.

ACS Style

Xu Cai; Wenke Huang; Kuanghuai Wu; Cai; Wu. Study of the Self-Healing Performance of Semi-Flexible Pavement Materials Grouted with Engineered Cementitious Composites Mortar based on a Non-Standard Test. Materials 2019, 12, 3488 .

AMA Style

Xu Cai, Wenke Huang, Kuanghuai Wu, Cai, Wu. Study of the Self-Healing Performance of Semi-Flexible Pavement Materials Grouted with Engineered Cementitious Composites Mortar based on a Non-Standard Test. Materials. 2019; 12 (21):3488.

Chicago/Turabian Style

Xu Cai; Wenke Huang; Kuanghuai Wu; Cai; Wu. 2019. "Study of the Self-Healing Performance of Semi-Flexible Pavement Materials Grouted with Engineered Cementitious Composites Mortar based on a Non-Standard Test." Materials 12, no. 21: 3488.

Journal article
Published: 09 May 2019 in Sensors
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Real-time and accurate monitoring of dynamic deflection is of great significance for health monitoring and condition assessment of bridge structures. This paper proposes an improved step-type liquid level sensing system (LLSS) for dynamic deflection monitoring. Layout of straight-line-type pipeline is replaced by step-type pipeline in this improved deflection monitoring system, which can remove the interference of the inclination angle on the measurement accuracy and is applicable for dynamic deflection monitoring. Fluid dynamics are first analyzed to demonstrate that measurement accuracy is interfered with by the fluid velocity induced by structural vibration, and ANSYS-FLOTRAN is applied for analyzing the influence range caused by the turbulent flow. Finally, a step-type LLSS model is designed and experimented with to verify the influence of the three key parameters (initial displacement excitation, step height, and distance from the measurement point to the elbow) on the measurement accuracy, and the reasonable placement scheme for the measurement point is determined. The results show that the measurement accuracy mainly depends on the turbulent flow caused by step height. The measurement error gets smaller after about 1.0 m distance from the elbow. To ensure that the measurement error is less than 6%, the distance between the measurement point and the elbow should be larger than 1.0 m.

ACS Style

Xijun Ye; Zhuo Sun; Xu Cai; Liu Mei. An Improved Step-Type Liquid Level Sensing System for Bridge Structural Dynamic Deflection Monitoring. Sensors 2019, 19, 2155 .

AMA Style

Xijun Ye, Zhuo Sun, Xu Cai, Liu Mei. An Improved Step-Type Liquid Level Sensing System for Bridge Structural Dynamic Deflection Monitoring. Sensors. 2019; 19 (9):2155.

Chicago/Turabian Style

Xijun Ye; Zhuo Sun; Xu Cai; Liu Mei. 2019. "An Improved Step-Type Liquid Level Sensing System for Bridge Structural Dynamic Deflection Monitoring." Sensors 19, no. 9: 2155.

Research article
Published: 03 March 2019 in Advances in Materials Science and Engineering
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Asphalt mixture is a particulate composite material consisting of aggregate, mastic, and air voids. The computed tomography (CT) image-based finite element approach is used as an effective method to simulate micromechanical response of asphalt mixture. For finite element analysis, the accuracy of the finite results is determined by the size of the finite element. In this paper, a voxel-based three-dimensional (3D) digital reconstruction model of asphalt mixture with the CT images after being processed was proposed. In this 3D model, the aggregate phase was considered as elastic materials while the asphalt mastic phase was considered as linear viscoelastic material. Four micromechanical digital models were generated, whose voxel sizes were 0.5 mm, 0.67 mm, 1.0 mm, and 2.0 mm, respectively. The four digital models were used to conduct uniaxial creep test for predicting creep stiffness modulus to investigate the effect of voxel size. Simulation results showed that the voxel sizes had a significant effect on creep stiffness modulus. For the creep simulation test, the most appropriate voxel size whose creep stiffness modulus changes within 2.5% is 1.0 mm with regard to time steps, computational time, aggregate, and mastic shape representations.

ACS Style

Kuanghuai Wu; Qingzi Deng; Naiming Deng; Xu Cai; Wenke Huang. Size Effects of Finite Element Model for Three-Dimensional Microstructural Modeling of Asphalt Mixture. Advances in Materials Science and Engineering 2019, 2019, 1 -9.

AMA Style

Kuanghuai Wu, Qingzi Deng, Naiming Deng, Xu Cai, Wenke Huang. Size Effects of Finite Element Model for Three-Dimensional Microstructural Modeling of Asphalt Mixture. Advances in Materials Science and Engineering. 2019; 2019 ():1-9.

Chicago/Turabian Style

Kuanghuai Wu; Qingzi Deng; Naiming Deng; Xu Cai; Wenke Huang. 2019. "Size Effects of Finite Element Model for Three-Dimensional Microstructural Modeling of Asphalt Mixture." Advances in Materials Science and Engineering 2019, no. : 1-9.

Journal article
Published: 01 August 2018 in Construction and Building Materials
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While the rutting performance of asphalt mixture is largely affected by the skeleton characteristics of the aggregate, the relationship between skeleton formation and rutting performance is not adequately understood. This study experimentally investigates the whole process of asphalt mixture skeleton formation by employing multilevel mixing gradation design method and digital image processing technology on three mixtures. The strength formation process of the mixture is analyzed by performing a laboratory test to establish the dynamic stability estimation model. Results indicate that a small discontinuity in gradation is helpful to enhance the density of the mixture even though skeleton formation and skeleton embedding are not necessarily correlated. With successive mixing of finer aggregate particles, the void ratio and Voids in the Mineral Aggregate (VMA) of the mixture were decreased continually but the stability and dynamic stability were increased. The number of contact points increased firstly and then decreased, and the inclination angle decreased monotonically. The number of contact points should be controlled within a reasonable range during the gradation design. However, a small initial inclination of aggregates possesses a higher dynamic stability. The estimation model proposed in this study could distinguish the influence of the asphalt type for mixtures with the same initial skeleton characteristics.

ACS Style

X. Cai; K.H. Wu; W.K. Huang; C. Wan. Study on the correlation between aggregate skeleton characteristics and rutting performance of asphalt mixture. Construction and Building Materials 2018, 179, 294 -301.

AMA Style

X. Cai, K.H. Wu, W.K. Huang, C. Wan. Study on the correlation between aggregate skeleton characteristics and rutting performance of asphalt mixture. Construction and Building Materials. 2018; 179 ():294-301.

Chicago/Turabian Style

X. Cai; K.H. Wu; W.K. Huang; C. Wan. 2018. "Study on the correlation between aggregate skeleton characteristics and rutting performance of asphalt mixture." Construction and Building Materials 179, no. : 294-301.

Research article
Published: 14 September 2017 in Advances in Materials Science and Engineering
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Rutting is common pavement distress, which leads to lower riding comfort for road users and high maintenance costs. One of the commonly used tests is the simulation test with wheel tracking devices. Here, a new rutting test system has been developed based on the “Driving Wheel Pavement Analyzer” (DWPA) to evaluate the rutting performance of asphalt mixtures. This study conducted three types of rutting tests to validate feasibility, reliability, and accuracy of DWPA test. The results indicated that the DWPA test provided more information on ruts and enabled us to distinguish the performance of materials. The CDWPA index is better suited to reflect the rutting resistance of the material, which is highly correlated to the APA rutting index and the rutting test index of China according to the grey relational analysis results.

ACS Style

Xu Cai; Duanyi Wang; Wenke Huang; Jiangmiao Yu; Cheng Wan. Evaluation of Rutting Performance of Asphalt Mixture with Driving Wheel Pavement Analyzer. Advances in Materials Science and Engineering 2017, 2017, 1 -10.

AMA Style

Xu Cai, Duanyi Wang, Wenke Huang, Jiangmiao Yu, Cheng Wan. Evaluation of Rutting Performance of Asphalt Mixture with Driving Wheel Pavement Analyzer. Advances in Materials Science and Engineering. 2017; 2017 ():1-10.

Chicago/Turabian Style

Xu Cai; Duanyi Wang; Wenke Huang; Jiangmiao Yu; Cheng Wan. 2017. "Evaluation of Rutting Performance of Asphalt Mixture with Driving Wheel Pavement Analyzer." Advances in Materials Science and Engineering 2017, no. : 1-10.