Article
Chemistry, Multidisciplinary
Ping Li, Xuan Xiao, Shuaituan Tian, Junbin Liu, Wenju Peng, Bin Wang, Shende Liu
Summary: This study investigates the impact of gradation parameters on the performance of asphalt rubber stress-absorbing membrane interlayers. The results show significant differences in the performance of mixtures with different gradation ranges in different tests. This research provides important references for the optimization of grading design and evaluation of crack resistance in asphalt rubber stress-absorbing membrane interlayers.
APPLIED SCIENCES-BASEL
(2023)
Article
Construction & Building Technology
Liya Jiao, Rongzong Wu, John Harvey
Summary: This study investigates the mechanism of crack initiation of traffic-induced reflective cracking by developing a 3D finite element model. The results indicate that the dominant strain for damage depends on the bonding condition between the asphalt concrete (AC) and jointed plain Portland cement concrete (PCC) layers.
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Fujin Hou, Tao Li, Xu Li, Yunliang Li, Meng Guo
Summary: By establishing a mechanical model through finite element analysis, this study demonstrated that the anti-reflective cracking performance of a full-depth asphalt pavement is better than a semi-rigid base pavement. The loading mode based on direct tension is more suitable for analyzing the propagation mechanism of reflection cracks and the pavement structure's anti-cracking performance.
Article
Construction & Building Technology
Jose A. Guzman-Torres, Luis A. Morales-Rosales, Ignacio Algredo-Badillo, Gerardo Tinoco-Guerrero, Mariana Lobato-Baez, Jose O. Melchor-Barriga
Summary: Advancements in deep learning have been applied in civil engineering, but further exploration is needed for applying deep learning techniques to asphalt research. This study aims to classify images of asphalt damage based on surface deformation caused by the HWT test using a convolutional neural network model. The model developed in this research can identify the level of damage and has shown adaptability to new images under actual road conditions.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Construction & Building Technology
Yu Sun, Sheng Li, Miao Wang, Shiqing Yu
Summary: A new design method for continuous reinforced concrete composite asphalt pavement is proposed, considering the effect of the asphalt concrete layer on the longitudinal reinforcement rate of the continuous reinforced concrete layer. The study provides criteria for microcrack width control and offers insights into the most unfavorable working conditions and damage locations.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Chemical
Ziqi Zeng, Yinchuan Guo, Peng Li, Aiqin Shen, Chaowei Zhai
Summary: By adding glass fiber, the fiber-reinforced asphalt rubber stress-absorbing membrane interlayer (FAR-SAMI) shows improved fracture performance, effectively extending the pavement's service life and restraining the development of reflective cracks.
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Civil
Nirmal Dhakal, Mostafa Elseifi, Imad L. Al-Qadi, Tyson Rupnow
Summary: The study investigated the mechanisms of fatigue cracking and reflective cracking in flexible pavement caused by the presence of a cement-treated base (CTB) layer. Using 3D finite-element (FE) models and experimental validation, it was found that surface fatigue cracking is initiated by vertical shear strain and high tensile strain exacerbated by loading within the AC layer. Transverse tangential stresses significantly increased surface tensile strains, whereas longitudinal tire contact stresses had minimal effect on AC tensile strains.
JOURNAL OF TRANSPORTATION ENGINEERING PART B-PAVEMENTS
(2021)
Article
Materials Science, Multidisciplinary
Snezana Vulovic, Miroslav Zivkovic, Ana Pavlovic, Rodoljub Vujanac, Marko Topalovic
Summary: Crawler travel gear is a heavy vehicle propulsion commonly found in tanks, excavators, and off-road vehicles. It has advantages in weight distribution over soft terrain but may damage paved roads and requires reliability verification due to its complex design and heavy weight. This paper presents a methodology for FEM analysis of parts of an eight-wheel bogie according to DIN 22261-2 standard.
Article
Construction & Building Technology
Meng Ling, Jie Ji, Hossain Tanvir, Luis Fuentes, Lubinda F. Walubita
Summary: This study compared the influence of volumetric properties on the viscoplastic deformation, stripping, and cracking performance of asphalt mixtures, and investigated the correlations between these performance indices. The results showed that asphalt mixtures prone to stripping had fine aggregate gradations, and the effect of aggregate gradation was more significant than that of asphalt binder content. Additionally, the deformation and cracking of asphalt mixtures with stripping were positively correlated, while the response trends for the non-stripping asphalt mixtures were uncertain. The study indicated the potential to predict and estimate the performance indices of asphalt mixtures prone to stripping.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
Ping Li, Wenju Peng, Shuaituan Tian, Zhaohui Liu, Junbin Liu, Shende Liu
Summary: The crack resistance of AR-SAMI was evaluated by conducting various tests on AR-SAMI with different gradations and air voids. Results showed that the crack resistance of AR-SAMI improved as the air voids decreased. The AR-SAMI with more fine aggregate had excellent crack resistance, while the AR-SAMI with more coarse aggregate had better crack extension resistance under the condition of pre-existing cracks.
Article
Engineering, Geological
Leilei Chen, Gang Liu, Bo Yao, Zhendong Qian
Summary: This study developed a new rutting prediction model for semi-rigid base asphalt pavement (SBAP) based on field core specimens and Hamburg wheel tracking (HWT) test data. The proposed model showed significantly improved prediction accuracy compared to the original model embedded in the Chinese specification. The model development process could also be applied to other regions for rutting prediction.
INTERNATIONAL JOURNAL OF GEOMECHANICS
(2021)
Article
Construction & Building Technology
Gholamali Shafabakhsh, Saeed Ahmadi
Summary: The study found that asphalt interlayer modification is more effective in reducing reflective crack propagation compared to AC overlay modification. Simultaneous modification of both the interlayer and overlay significantly decreases reflective cracking potential. CRM binders containing natural zeolite are more efficient in crack mitigation than CRM binders containing hydrated lime.
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Slawomir Tarkowski, Aleksander Nieoczym, Jacek Caban, Petr Jilek, Marie Sejkorova
Summary: The article presents the results of simulations using the finite element method (FEM) to investigate the damage caused to the wheel rim by hitting an obstacle. These results can be used as comparative data for expert opinions on the cause of the damage. Additionally, the data obtained from the FEM simulation can aid in the geometric optimization of the rim to create a rim that is resistant to this type of damage.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Physical
Juan Francisco Perez-Landeros, Pedro Limon-Covarrubias, Jose Roberto Galaviz-Gonzalez, David Avalos-Cueva, Maria de la Luz Perez-Rea, Miguel Zamora-Palacios
Summary: This paper evaluates the mode I fracture toughness of asphalt mixtures with symmetric geometry specimens at intermediate temperature. Results show differences between simulations and tests, and identify the operating conditions that best represent the stress state of the test.
Article
Construction & Building Technology
Lubinda F. Walubita, Luis Fuentes, Sang Lee, Oswaldo Guerrero, Enad Mahmoud, Bhaven Naik, Geoffrey S. Simate
Summary: This study utilized the Texas Data Storage System to correlate and preliminarily validate the laboratory monotonic-loading overlay tester with field crack performance. The results indicated that the monotonic-loading OT test exhibited promising repeatability for evaluating and quantifying the cracking resistance potential of HMA mixes in the laboratory.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Materials Science, Characterization & Testing
Wu Bo, Jinzhou Liu, Weizhi Peng, Wenchuan Peng, Bin Yu
Summary: The addition of thermochromic powders in asphalt binders results in decreased penetration and creep rate, as well as increased softening point, viscosity, rutting parameter, and stiffness. It is recommended to use 5 to 6 % of thermochromic powders to effectively reduce surface temperature in summer and maintain adequate road temperature in winter to prevent cracking or icing.
JOURNAL OF TESTING AND EVALUATION
(2021)
Article
Construction & Building Technology
Bin Yu, Weizhi Peng, Jinzhou Liu, Jiayu Zhang, Wei Li, Qianzhe Hong
Summary: Thermochromic materials were used to control road surface temperature, reducing it in summer and delaying temperature decrease in winter, while also improving high-temperature performance. Blue thermochromic material improves low-temperature crack resistance, with overall balance of performance improvements recommending its use.
ROAD MATERIALS AND PAVEMENT DESIGN
(2022)
Article
Engineering, Civil
Md. Mokaddesul Hoque, Qing Lu, Amir Ghiasi, Chunfu Xin
Summary: This study examined various lane management approaches in terms of truck platooning and estimated their impact on construction, rehabilitation, and fuel consumption costs. While most approaches reduced construction costs and increased rehabilitation costs, fuel consumption costs decreased due to truck platooning in all scenarios. Adding a separate truck-only lane for platooning showed significantly higher fuel consumption benefits.
JOURNAL OF TRANSPORTATION ENGINEERING PART A-SYSTEMS
(2021)
Article
Engineering, Multidisciplinary
Jinzhou Liu, Bin Yu, Shuyi Wang, Lu Li, Jiaqiang Zhang
Summary: The study found that on the surface of steel slag, the diffusion rate of asphalt's SARA components follows Arrhenius's law, with resins and asphaltene showing higher diffusion rates nearby, and the colloid structure being sensitive to humidity.
Article
Environmental Studies
Bin Yu, Lu Li, Xin Tian, Qiannan Yu, Jinzhou Liu, Qian Wang
Summary: The study integrated material flow analysis and life cycle assessment methods to quantify the material stocks and environmental impacts of urban road system, showing that arterial roads store the largest amount of materials and macadam occupies nearly 80% of total material stocks in Nanjing. The increase of road class coincides with the increase of material stock per unit area and enhances the material utilization efficiency.
TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT
(2021)
Article
Engineering, Civil
Bin Yu, Xiangcheng Meng, Qiannan Yu
Summary: A two-step convolutional neural network method is proposed for pavement crack detection on pixel-levels, reducing time consumption while maintaining accuracy. Experimental results demonstrate that this method significantly decreases processing time with minimal loss of accuracy compared to pure-segmentation networks.
JOURNAL OF TRANSPORTATION ENGINEERING PART B-PAVEMENTS
(2021)
Article
Engineering, Civil
Can Cui, Chengchao Guo, Qing Lu, Fuming Wang, Hongyuan Fang
Summary: Polyurethane grouting technology has been successfully used in the maintenance and reinforcement of transportation infrastructure, but the fatigue performance of polyurethane materials in concrete-polyurethane composite structures under cyclic compressive loading has not been widely studied. This research investigated the effects of key design factors on the stress-strain and fatigue performance, with the results showing a distinct three-stage strain response to stress-controlled cyclic loading and ranking the factors in terms of influence on fatigue performance.
JOURNAL OF TRANSPORTATION ENGINEERING PART B-PAVEMENTS
(2021)
Article
Green & Sustainable Science & Technology
Qing Lu, Chunfu Xin, Mohammed Alamri, Mohammad Alharthai
Summary: This study improved the durability and strength of porous asphalt mixture by formulating a bio-based epoxy asphalt binder (BEAB) and optimizing its mixture design. Testing showed that the formulated BEAB can enhance the raveling resistance and stability of porous asphalt mixture without affecting its permeability.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Chemistry, Physical
Mohammad Alharthai, Qing Lu, Ahmed Elnihum, Asad Elmagarhe
Summary: This study found that there was no significant difference in Marshall stability and indirect tensile strength when using Florida washed shell as a substitute for conventional aggregate in open-graded asphalt mixtures. The optimal substitution percentages of Florida washed shell in open-graded asphalt mixtures were determined to be 15, 30, and 45% for different NMAS gradations of 12.5, 9.5, and 4.75 mm, respectively.
Article
Green & Sustainable Science & Technology
Shihab Uddin, Qing Lu, Hung Nguyen
Summary: This study analyzed the impact of vehicle loading on buried water pipes using finite element models and found that heavy trucks have negligible impact on the water pipes. Therefore, considering the interdependency between water and road infrastructures, the impact of vehicles on water pipes may not need to be considered.
Article
Engineering, Civil
Chunfu Xin, Qing Lu, Hong Zhang
Summary: This study investigates the effects of asphalt overlay design on the initiation of various types of pavement distress and considers the factors of endogenous bias and unobserved heterogeneity. The results show that the endogenous overlay design underestimates the service life of the overlaid pavement and increasing the asphalt overlay thickness can decrease the occurrence probability of pavement distress. The use of reclaimed asphalt pavement material can retard the occurrence of severe rutting but accelerate the occurrence of all types of cracking. Milling and overlay techniques can significantly reduce the hazard rate of severe rutting and all types of cracking compared to asphalt overlay.
TRANSPORTATION RESEARCH RECORD
(2022)
Article
Construction & Building Technology
Jiahao Tian, Sang Luo, Qing Lu, Shicheng Liu
Summary: This study investigated the effects of epoxy resin contents on the performance of hot-mix epoxy asphalt and found a cost-effective proportion. Results showed that when the epoxy resin content exceeds or equals 40%, the mechanical properties of epoxy asphalt meet the requirements. Increased epoxy resin content also leads to a higher viscosity-increasing rate, especially at high temperatures. Additionally, certain wavenumbers in the infrared spectrum of epoxy asphalt demonstrate positive correlations with epoxy resin contents. Fluorescence microscopy tests revealed agglomeration of epoxy resin particles and the formation of a cross-linked spatial structure when the epoxy resin content exceeds or equals 40 wt%.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2022)
Article
Chemistry, Physical
Asad Elmagarhe, Qing Lu, Mohammad Alharthai, Mohammed Alamri, Ahmed Elnihum
Summary: This study investigates the effects of two waste materials, recycled concrete aggregate (RCA) and Type C fly ash, on the performance of porous asphalt mixture. The results show that incorporating RCA or fly ash slightly reduces the air-void content, permeability, and macrotexture of the mixture. However, further substitution of mineral filler with fly ash offsets the negative impact of RCA and brings the mechanical properties of the mixture with 10% RCA to levels comparable to those of the control mixture.
Article
Materials Science, Multidisciplinary
Mohammed Alamri, Qing Lu, Asad Elmagarhe, Ahmed Elnihum
Summary: To improve the sustainability of road pavements, transportation agencies should consider using recycled materials such as reclaimed epoxy asphalt pavement in their designs. The recyclability of epoxy asphalt, a long-lasting pavement material, has become a concern for promoting its use in road pavements. Recent studies have explored the use of reclaimed epoxy asphalt materials in asphalt and cement-concrete mixtures. The incorporation of these materials had various effects on the performance of the mixtures, including changes in density, void content, permeability, and compressive strength. The results showed that the use of reclaimed epoxy asphalt materials reduced density, increased void content, and had higher permeability values compared to natural mixes, while the addition of silica fume reduced permeability. Substituting aggregates with reclaimed materials also significantly reduced compressive strength.
Article
Engineering, Environmental
Hsiang-Yang Shyu, Cynthia J. Castro, Robert A. Bair, Qing Lu, Daniel H. Yeh
Summary: This study aimed to design and implement a real-time remote monitoring system for onsite wastewater treatment systems (OWTS) by developing soft sensors to accurately predict key water quality parameters including COD, TSS, and E.coli. The results showed that the support vector regression (SVR) model provided the best prediction performance for COD with a MAPE of 14.5% and R2 of 0.96. The cubist regression (CUB) model provided the optimal predictive performance for TSS with a MAPE of 24.8% and R2 of 0.99. The prediction results for E.coli were not satisfactory and further improvement is required.
ACS ENVIRONMENTAL AU
(2023)
