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Articles 1 - 30 of 121
Full-Text Articles in Engineering
Development Of A Group Contribution Method To Predict The Aqueous-Phase Reactivities Of Hydrated Electrons With Organic Compounds, Rose Daily, Daisuke Minakata
Development Of A Group Contribution Method To Predict The Aqueous-Phase Reactivities Of Hydrated Electrons With Organic Compounds, Rose Daily, Daisuke Minakata
Michigan Tech Publications
Hydrated electrons produced in aqueous-phase advanced reduction processes (ARPs) effectively destroy oxidized forms of environmentally relevant organic contaminants, including alkyl halides. Although the rate constants of hydrated electrons with various organic compounds have been experimentally measured and compiled in the literature, no mechanistic prediction tools have been developed. Given that numerous organic compounds are used in commercial production, a prediction tool for the fate of organic compounds in the aqueous-phase ARPs will be useful. This study focused on developing a group contribution method for hydrated electrons (GCMe) to predict the second-order rate constants with aliphatic and aromatic compounds. The GCMe …
Comparison Of Asphalt Emulsion-Based Chip Seal And Hot Rubber Asphalt-Based Chip Seal, Dongzhao Jin, Lei Yin, Kai Xin, Zhanping You
Comparison Of Asphalt Emulsion-Based Chip Seal And Hot Rubber Asphalt-Based Chip Seal, Dongzhao Jin, Lei Yin, Kai Xin, Zhanping You
Michigan Tech Publications
The use of asphalt emulsion chip seal and hot rubber chip seal as pavement preservation techniques has been gaining popularity. This study aims to compare the laboratory performance of asphalt emulsion and hot rubber asphalt used in chip seal applications. Interlayer shear strength (ISS) and interlayer tensile strength (ITS) tests were designed to evaluate the bond quality of the chip seal samples prepared for both materials. The sweep test was used to estimate the aggregate loss of the chip seal on the asphalt pavement. The universal testing machines were used to evaluate the deterioration of the ISS and ITS values …
A Case Study Of The Comparison Between Rubberized And Polymer Modified Asphalt On Heavy Traffic Pavement In Wet And Freeze Environment, Dongzhao Jin, Kwadwo Ampadu Boateng, Dongdong Ge, Tiankai Che, Lei Yin, Wayne Harrall, Zhanping You
A Case Study Of The Comparison Between Rubberized And Polymer Modified Asphalt On Heavy Traffic Pavement In Wet And Freeze Environment, Dongzhao Jin, Kwadwo Ampadu Boateng, Dongdong Ge, Tiankai Che, Lei Yin, Wayne Harrall, Zhanping You
Michigan Tech Publications
Ground tire rubber (GTR) usage in asphalt pavement with the dry process has gained more prominence in recent times. The objective of this work is to investigate the pavement performance of GTR-modified asphalt pavement and polymer-modified asphalt pavement on heavy volume of traffic conditions in Michigan's wet and freeze environment. A suite of laboratory tests was done to evaluate the pavement performance of GTR-modified and polymer-modified asphalt mixtures. To reveal the strain and stress relationship under different frequencies and temperatures, the dynamic modulus test was applied. The Hamburg wheel tracking device (HWTD) was used to assess the high-temperature deformation resistance. …
Insights On Simulating Summer Warming Of The Great Lakes: Understanding The Behavior Of A Newly Developed Coupled Lake-Atmosphere Modeling System, Miraj Kayastha, Chenfu Huang, Jiali Wang, William J. Pringle, T. C. Chakraborty, Zhao Yang, Robert D. Hetland, Yun Qian, Pengfei Xue
Insights On Simulating Summer Warming Of The Great Lakes: Understanding The Behavior Of A Newly Developed Coupled Lake-Atmosphere Modeling System, Miraj Kayastha, Chenfu Huang, Jiali Wang, William J. Pringle, T. C. Chakraborty, Zhao Yang, Robert D. Hetland, Yun Qian, Pengfei Xue
Michigan Tech Publications
The Laurentian Great Lakes are the world's largest freshwater system and regulate the climate of the Great Lakes region, which has been increasingly experiencing climatic, hydrological, and ecological changes. An accurate mechanistic representation of the Great Lakes thermal structure in Regional Climate Models (RCMs) is paramount to studying the climate of this region. Currently, RCMs have primarily represented the Great Lakes through coupled one-dimensional (1D) column lake models; this approach works well for small inland lakes but is unable to resolve the realistic hydrodynamics of the Great Lakes and leads to inaccurate representations of lake surface temperature (LST) that influence …
Experimental Testing And Constitutive Modelling Of Pavement Materials, Xueyan Liu, Yuqing Zhang, Zhanping You, Linbing Wang, Changhong Zhou
Experimental Testing And Constitutive Modelling Of Pavement Materials, Xueyan Liu, Yuqing Zhang, Zhanping You, Linbing Wang, Changhong Zhou
Michigan Tech Publications
No abstract provided.
Experimental Testing And Constitutive Modelling Of Pavement Materials, Xueyan Liu, Yuqing Zhang, Zhanping You, Linbing Wang, Changhong Zhou
Experimental Testing And Constitutive Modelling Of Pavement Materials, Xueyan Liu, Yuqing Zhang, Zhanping You, Linbing Wang, Changhong Zhou
Michigan Tech Publications
Pavement materials such as asphalt mixtures, granular aggregates and soils exhibit complex material properties and engineering performance under external loading and environmental conditions [...].
Identify The Micro-Parameters For Optimized Discrete Element Models Of Granular Materials In Two Dimensions Using Hexagonal Close-Packed Structures, Xiaodong Zhou, Dongzhao Jin, Dongdong Ge, Siyu Chen, Zhanping You
Identify The Micro-Parameters For Optimized Discrete Element Models Of Granular Materials In Two Dimensions Using Hexagonal Close-Packed Structures, Xiaodong Zhou, Dongzhao Jin, Dongdong Ge, Siyu Chen, Zhanping You
Michigan Tech Publications
The widely used simple cubic-centered (SCC) model structure has limitations in handling diagonal loading and accurately representing Poisson’s ratio. Therefore, the objective of this study is to develop a set of modeling procedures for granular material discrete element models (DEM) with high efficiency, low cost, reliable accuracy, and wide application. The new modeling procedures use coarse aggregate templates from an aggregate database to improve simulation accuracy and use geometry information from the random generation method to create virtual specimens. The hexagonal close-packed (HCP) structure, which has advantages in simulating shear failure and Poisson’s ratio, was employed instead of the SCC …
A Review On The Application Of 3d Printing Technology In Pavement Maintenance, Fangyuan Gong, Xuejiao Cheng, Qinghua Wang, Yi Chen, Zhanping You, Yu Liu
A Review On The Application Of 3d Printing Technology In Pavement Maintenance, Fangyuan Gong, Xuejiao Cheng, Qinghua Wang, Yi Chen, Zhanping You, Yu Liu
Michigan Tech Publications
To examine the application and significance of 3D printing technology in pavement maintenance engineering, a review of the current developments in principles, types, materials, and equipment for 3D printing was conducted. A comparison and analysis of traditional methods and 3D printing for asphalt pavement maintenance led to an investigation of 3D asphalt printing technologies and equipment. As a result, the following suggestions and conclusions are proposed: 3D printing technology can increase the level of automation and standardization of pavement maintenance engineering, leading to effective improvements in worker safety, climate adaptability, repair accuracy, etc. For on-site repair of cracks and minor …
Racial Disparities In The Construction Domain: A Systematic Literature Review Of The U.S. Educational And Workforce Domain, Josiane Isingizwe, Ricardo Eiris, Masoud Gheisari
Racial Disparities In The Construction Domain: A Systematic Literature Review Of The U.S. Educational And Workforce Domain, Josiane Isingizwe, Ricardo Eiris, Masoud Gheisari
Michigan Tech Publications
Trends in the construction domain, educational enrollment, student graduation, student industry employment, and workforce retention demonstrate that minorities—Hispanics, African Americans, Asian Americans, and Native Americans—are often excluded, segregated, or ignored in this domain. A systematic literature review (N = 68) was conducted to investigate the causes and effects of racial disparities produced by systemic racism in the educational and workforce domains of construction. Particularly, this paper focuses on exploring how racial disparities in construction impact minorities, the current state of the racial divide, the practices that perpetuate racial inequities, and the strategies currently used to prevent, in a sustainable manner, …
Moisture Sources Of Precipitation In The Great Lakes Region: Climatology And Recent Changes, Zhao Yang, Yun Qian, Pengfei Xue, Jiali Wang, T. C. Chakraborty, William J. Pringle, Jianfeng Li, Xiaodong Chen
Moisture Sources Of Precipitation In The Great Lakes Region: Climatology And Recent Changes, Zhao Yang, Yun Qian, Pengfei Xue, Jiali Wang, T. C. Chakraborty, William J. Pringle, Jianfeng Li, Xiaodong Chen
Michigan Tech Publications
Given the critical role of precipitation on hydroclimate, we quantified the contributions of moisture source regions to precipitation in the Great Lakes Region (GLR) using multiple reanalysis data sets. Results show that the Great Plains (GPs) and the GLR itself are the primary sources of moisture. The moisture sources for the double peaks in the GLR precipitation that occur in June and September are identified, which is caused by a shift in the peak timing of moisture contribution from the GLR and GPs. In particular, moisture from the GPs contributes more to the heavy precipitation, while moisture from the GLR …
Reconstruction Of Asphalt Pavements With Crumb Rubber Modified Asphalt Mixture In Cold Region: Material Characterization, Construction, And Performance, Dongzhao Jin, Dongdong Ge, Jiaqing Wang, Lance Malburg, Zhanping You
Reconstruction Of Asphalt Pavements With Crumb Rubber Modified Asphalt Mixture In Cold Region: Material Characterization, Construction, And Performance, Dongzhao Jin, Dongdong Ge, Jiaqing Wang, Lance Malburg, Zhanping You
Michigan Tech Publications
Dry-processed rubberized asphalt mixture has recently attracted a lot of attention as an alternative to conventional asphalt mixtures. Dry-processed rubberized asphalt pavement has improved the overall performance characteristics compared to the conventional asphalt road. The objective of this research is to demonstrate the reconstruction of rubberized asphalt pavement and evaluate the pavement performance of dry-processed rubberized asphalt mixture based on laboratory and field tests. The noise mitigation effect of dry-processed rubberized asphalt pavement was evaluated at the field construction sites. A prediction of pavement distresses and long-term performance was also conducted using mechanistic-empirical pavement design. In terms of experimental evaluation, …
Predictions Of Household Water Affordability Under Conditions Of Climate Change, Demographic Growth, And Fresh Groundwater Depletion In A Southwest Us City Indicate Increasing Burdens On The Poor, Josiah M. Heyman, Alex S. Mayer, Jessica Alger
Predictions Of Household Water Affordability Under Conditions Of Climate Change, Demographic Growth, And Fresh Groundwater Depletion In A Southwest Us City Indicate Increasing Burdens On The Poor, Josiah M. Heyman, Alex S. Mayer, Jessica Alger
Michigan Tech Publications
Reduced river flows and groundwater depletion as a result of climate change and population growth have increased the effort and difficulty accessing and processing water. In turn, residential water costs from municipal utilities are predicted to rise to unaffordable rates for poor residential water customers. Building on a regional conjunctive use model with future climate scenarios and 50-year future water supply plans, our study communicates the effects of climate change on poor people in El Paso, Texas, as water becomes more difficult and expensive to obtain in future years. Four scenarios for future water supply and future water costs were …
Intelligent Control Of Groundwater In Slopes With Deep Reinforcement Learning †, Aynaz Biniyaz, Behnam Azmoon, Zhen (Leo) Liu
Intelligent Control Of Groundwater In Slopes With Deep Reinforcement Learning †, Aynaz Biniyaz, Behnam Azmoon, Zhen (Leo) Liu
Michigan Tech Publications
The occurrence of landslides has been increasing in recent years due to intense and prolonged rainfall events. Lowering the groundwater in natural and man-made slopes can help to mitigate the hazards. Subsurface drainage systems equipped with pumps have traditionally been regarded as a temporary remedy for lowering the groundwater in geosystems, whereas long-term usage of pumping-based techniques is uncommon due to the associated high operational costs in labor and energy. This study investigates the intelligent control of groundwater in slopes enabled by deep reinforcement learning (DRL), a subfield of machine learning for automated decision-making. The purpose is to develop an …
Use Of High-Resolution Multi-Temporal Dem Data For Landslide Detection, Behnam Azmoon, Aynaz Biniyaz, Zhen (Leo) Liu
Use Of High-Resolution Multi-Temporal Dem Data For Landslide Detection, Behnam Azmoon, Aynaz Biniyaz, Zhen (Leo) Liu
Michigan Tech Publications
Landslides in urban areas have been relatively well-documented in landslide inventories despite issues in accuracy and completeness, e.g., the absence of small landslides. By contrast, less attention has been paid to landslides in sparsely populated areas in terms of their occurrences and locations. This study utilizes high-resolution and LiDAR-derived digital elevation models (DEMs) at two different times for landslide detection to (1) improve the localization and detection accuracies in landslide inventories, (2) minimize human intervention in the landslide detection process, and (3) identify landslides that cannot be easily documented in the current state of the practice. To achieve this goal, …
Technical And Economic Viability Of Distributed Recycling Of Low-Density Polyethylene Water Sachets Into Waste Composite Pavement Blocks, Celestin Tsala-Mbala, Koami Soulemane Hayibo, Theresa K. Meyer, Nadine Couao-Zotti, Paul Cairns, Joshua M. Pearce
Technical And Economic Viability Of Distributed Recycling Of Low-Density Polyethylene Water Sachets Into Waste Composite Pavement Blocks, Celestin Tsala-Mbala, Koami Soulemane Hayibo, Theresa K. Meyer, Nadine Couao-Zotti, Paul Cairns, Joshua M. Pearce
Michigan Tech Publications
In many developing countries, plastic waste management is left to citizens. This usually results in landfilling or hazardous open-air burning, leading to emissions that are harmful to human health and the environment. An easy, profitable, and clean method of processing and transforming the waste into value is required. In this context, this study provides an open-source methodology to transform low-density polyethylene drinking water sachets, into pavement blocks by using a streamlined do-it-yourself approach that requires only modest capital. Two different materials, sand, and ashes are evaluated as additives in plastic composites and the mechanical strength of the resulting blocks are …
Rail Sample Laboratory Evaluation Of Eddy Current Rail Inspection Sustainable System, Jiaqing Wang, Qingli Dai, Pasi T. Lautala, Hui Yao, Ruizhe Si
Rail Sample Laboratory Evaluation Of Eddy Current Rail Inspection Sustainable System, Jiaqing Wang, Qingli Dai, Pasi T. Lautala, Hui Yao, Ruizhe Si
Michigan Tech Publications
Increasing the efficiency, frequency, and speed of rail defect detection can reduce maintenance costs and improve the sustainability of railways. The non-contact eddy current (EC) system can be operated along with a railcar for detecting rail flaws. Even if the EC can be utilized for rail defect identification and characterization, current commercial devices are not sufficient for defect classification on rails by providing highly sensitive signals for post-processing. In this study, we established an efficient and expandable eddy current rail inspection system and verified its capability for classification of different defect signals. The integrated hardware and software EC measurement system …
Comparison Of Rubber Asphalt With Polymer Asphalt Under Long-Term Aging Conditions In Michigan, Dongzhao Jin, Kwadwo Ampadu Boateng, Siyu Chen, Kai Xin, Zhanping You
Comparison Of Rubber Asphalt With Polymer Asphalt Under Long-Term Aging Conditions In Michigan, Dongzhao Jin, Kwadwo Ampadu Boateng, Siyu Chen, Kai Xin, Zhanping You
Michigan Tech Publications
The objective of this study is to compare the long-term aging performance of dry-processed rubber-modified asphalt mixture with styrene–butadiene–styrene polymer-modified asphalt mixture on heavy traffic volume roads in the wet-freeze environment of Michigan. The rutting performance was evaluated using the Hamburg wheel track device. The disc-shaped compact tension test was used to assess the fracture energy. The dynamic modulus experiment was used to estimate the load and displacement relationship. The asphalt binder properties were evaluated using multiple stress creep recovery and the linear amplitude sweep test. The pavement distresses were evaluated using the pavement mechanistic–empirical design. All three types of …
Investigation Of Adhesion Performance Of Wax Based Warm Mix Asphalt With Molecular Dynamics Simulation, Chao Peng, Hanneng Yang, Zhanping You, Hongchao Ma, Fang Xu, Lingyun You, Aboelkasim Diab, Li Lu, Yudong Hu, Yafeng Liu, Jing Dai, Zhibo Li
Investigation Of Adhesion Performance Of Wax Based Warm Mix Asphalt With Molecular Dynamics Simulation, Chao Peng, Hanneng Yang, Zhanping You, Hongchao Ma, Fang Xu, Lingyun You, Aboelkasim Diab, Li Lu, Yudong Hu, Yafeng Liu, Jing Dai, Zhibo Li
Michigan Tech Publications
Compared with traditional hot mix asphalt (HMA), wax based warm mix asphalt (WWMA) can be mixed with the aggregate at a lower temperature and achieve the desired compaction. However, the adhesion performance of WWMA on aggregate is uncertain. To evaluate the adhesion performance of asphalt and aggregate, researchers used contact angle test, pull-off test, and ultrasonic washing experiments. However, these tests cannot adequately explain the microscopic mechanism of the interface between asphalt and aggregate. Molecular dynamics (MD) can better explain the adhesion mechanism of asphalt aggregates because they can be simulated at the molecular scale. So, the purpose of this …
Anti-Skid Characteristics Of Asphalt Pavement Based On Partial Tire Aquaplane Conditions, Miao Yu, Yao Kong, Zhanping You, Jue Li, Liming Yang, Lingyun Kong
Anti-Skid Characteristics Of Asphalt Pavement Based On Partial Tire Aquaplane Conditions, Miao Yu, Yao Kong, Zhanping You, Jue Li, Liming Yang, Lingyun Kong
Michigan Tech Publications
This study presented a finite element model of radial tire-asphalt pavement interaction using ABAQUS 6.14 software to investigate the skid resistance properties of asphalt pavement under partial tire aquaplane conditions. Firstly, the pavement profile datum acquired by laser scanning were imported to Finite Element Analysis (FEA) software to conduct the pavement modeling. Secondly, a steady state rolling analysis of a tire on three types of asphalt pavements under drying conditions was carried out. Variation laws of the friction coefficient of the radial tire on different pavements with different pavement textures, tire pressures, and loads on the tire were examined. Subsequently, …
Classifying Mixing Regimes In Ponds And Shallow Lakes, Meredith A. Holgerson, David C. Richardson, Joseph Roith, Lauren E. Bortolotti, Kerri Finlay, Daniel J. Hornbach, Kshitij Gurung, Andrew Ness, Mikkel R. Andersen, Sheel Bansal, Jacques C. Finlay, Jacob A. Cianci-Gaskill, Shannon Hahn, Benjamin D. Janke, Cory Mcdonald, Jorrit P. Mesman, Rebecca L. North, Cassandra O. Roberts, Jon N. Sweetman, Jackie R. Webb
Classifying Mixing Regimes In Ponds And Shallow Lakes, Meredith A. Holgerson, David C. Richardson, Joseph Roith, Lauren E. Bortolotti, Kerri Finlay, Daniel J. Hornbach, Kshitij Gurung, Andrew Ness, Mikkel R. Andersen, Sheel Bansal, Jacques C. Finlay, Jacob A. Cianci-Gaskill, Shannon Hahn, Benjamin D. Janke, Cory Mcdonald, Jorrit P. Mesman, Rebecca L. North, Cassandra O. Roberts, Jon N. Sweetman, Jackie R. Webb
Michigan Tech Publications
Lakes are classified by thermal mixing regimes, with shallow waterbodies historically categorized as continuously mixing systems. Yet, recent studies demonstrate extended summertime stratification in ponds, underscoring the need to reassess thermal classifications for shallow waterbodies. In this study, we examined the summertime thermal dynamics of 34 ponds and shallow lakes across temperate North America and Europe to categorize and identify the drivers of different mixing regimes. We identified three mixing regimes: rarely (n = 18), intermittently (n = 10), and often (n = 6) mixed, where waterbodies mixed an average of 2%, 26%, and 75% of the study period, respectively. …
Climate Projections Over The Great Lakes Region: Using Two-Way Coupling Of A Regional Climate Model With A 3-D Lake Model, Pengfei Xue, Xinyu Ye, Jeremy S. Pal, Philip Y. Chu, Miraj Kayastha, Chenfu Huang
Climate Projections Over The Great Lakes Region: Using Two-Way Coupling Of A Regional Climate Model With A 3-D Lake Model, Pengfei Xue, Xinyu Ye, Jeremy S. Pal, Philip Y. Chu, Miraj Kayastha, Chenfu Huang
Michigan Tech Publications
Warming trends in the Laurentian Great Lakes and surrounding areas have been observed in recent decades, and concerns continue to rise about the pace and pattern of future climate change over the world's largest freshwater system. To date, most regional climate models used for Great Lakes projections either neglected the lake-atmosphere interactions or are only coupled with a 1-D column lake model to represent the lake hydrodynamics. This study presents a Great Lakes climate change projection that has employed the two-way coupling of a regional climate model with a 3-D lake model (GLARM) to resolve 3-D hydrodynamics essential for large …
Climate Projections Over The Great Lakes Region: Using Two-Way Coupling Of A Regional Climate Model With A 3-D Lake Model, Pengfei Xue, Xinyu Ye, Jeremy S. Pal, Philip Y. Chu, Miraj Kayastha, Chenfu Huang
Climate Projections Over The Great Lakes Region: Using Two-Way Coupling Of A Regional Climate Model With A 3-D Lake Model, Pengfei Xue, Xinyu Ye, Jeremy S. Pal, Philip Y. Chu, Miraj Kayastha, Chenfu Huang
Michigan Tech Publications
Warming trends in the Laurentian Great Lakes and surrounding areas have been observed in recent decades, and concerns continue to rise about the pace and pattern of future climate change over the world's largest freshwater system. To date, most regional climate models used for Great Lakes projections either neglected the lake-atmosphere interactions or are only coupled with a 1-D column lake model to represent the lake hydrodynamics. This study presents a Great Lakes climate change projection that has employed the two-way coupling of a regional climate model with a 3-D lake model (GLARM) to resolve 3-D hydrodynamics essential for large …
Integrating Deep Learning And Hydrodynamic Modeling To Improve The Great Lakes Forecast, Pengfei Xue, Aditya Wagh, Gangfeng Ma, Yilin Wang, Yongchao Yang, Tao Liu, Chenfu Huang
Integrating Deep Learning And Hydrodynamic Modeling To Improve The Great Lakes Forecast, Pengfei Xue, Aditya Wagh, Gangfeng Ma, Yilin Wang, Yongchao Yang, Tao Liu, Chenfu Huang
Michigan Tech Publications
The Laurentian Great Lakes, one of the world’s largest surface freshwater systems, pose a modeling challenge in seasonal forecast and climate projection. While physics-based hydrodynamic modeling is a fundamental approach, improving the forecast accuracy remains critical. In recent years, machine learning (ML) has quickly emerged in geoscience applications, but its application to the Great Lakes hydrodynamic prediction is still in its early stages. This work is the first one to explore a deep learning approach to predicting spatiotemporal distributions of the lake surface temperature (LST) in the Great Lakes. Our study shows that the Long Short-Term Memory (LSTM) neural network, …
Economic Feasibility Analysis Of Variable-Speed Pumps By Simulating 15 Multiple Water Distribution Systems, Conrad B. Truettner, Brian D. Barkdoll
Economic Feasibility Analysis Of Variable-Speed Pumps By Simulating 15 Multiple Water Distribution Systems, Conrad B. Truettner, Brian D. Barkdoll
Michigan Tech Publications
The UN Sustainability Goals address measures to reduce environmental pollution. Water distribution systems (WDSs) use electric energy, which pollutes the atmosphere through, at least partly, the burning of coal. This study simulates, through modeling, variable-speed pumps (VSPs) on 15 different real WDSs on the network solver EPANET and analyzes the payback period. An algorithm is introduced here to select the optimal pump speed pattern to save the most energy while satisfying the constrain of sufficient pressure at all times and all locations. It was found that five of the 15 systems operated unsuccessfully using a VSP, due to the VSP …
Literature Review On The Discrete Element Method In Asphalt Mixtures, Hui Yao, Mei Xu, Junfu Liu, Yu Liu, Jie Ji, Zhanping You
Literature Review On The Discrete Element Method In Asphalt Mixtures, Hui Yao, Mei Xu, Junfu Liu, Yu Liu, Jie Ji, Zhanping You
Michigan Tech Publications
Asphalt mixtures are commonly used in pavement engineering, especially for highway construction. The mechanism exploration and analysis of pavement distress are the main challenges for researchers and industry managers. Thereby, it is important to understand their properties and interaction mechanisms in asphalt mixtures. It is difficult to conduct some sophisticated or microscale tests in the laboratory, and numerical simulation and virtual tests can be solutions for these cases with low costs. The Discrete Element Method (DEM) is a promising tool for researchers to undertake these tasks. This paper mainly summarized and analyzed the research progress and development prospect of DEMs …
Response Of Green Lake, Wisconsin, To Changes In Phosphorus Loading, With Special Emphasis On Near-Surface Total Phosphorus Concentrations And Metalimnetic Dissolved Oxygen Minima, Dale M. Robertson, Benjamin J. Siebers, Robert Ladwig, David P. Hamilton, Paul C. Reneau, Cory P. Mcdonald, Stephanie Prellwitz, Richard C. Lathrop
Response Of Green Lake, Wisconsin, To Changes In Phosphorus Loading, With Special Emphasis On Near-Surface Total Phosphorus Concentrations And Metalimnetic Dissolved Oxygen Minima, Dale M. Robertson, Benjamin J. Siebers, Robert Ladwig, David P. Hamilton, Paul C. Reneau, Cory P. Mcdonald, Stephanie Prellwitz, Richard C. Lathrop
Michigan Tech Publications
Green Lake is the deepest natural inland lake in Wisconsin, with a maximum depth of about 72 meters. In the early 1900s, the lake was believed to have very good water quality (low nutrient concentrations and good water clarity) with low dissolved oxygen (DO) concentrations occurring in only the deepest part of the lake. Because of increased phos¬phorus (P) inputs from anthropogenic activities in its water¬shed, total phosphorus (TP) concentrations in the lake have increased; these changes have led to increased algal produc¬tion and low DO concentrations not only in the deepest areas but also in the middle of the …
Experimental Assessments Of Methanol-Based Foaming Agent In Latex Modified Foamed Binders And Warm Asphalt Mixtures, Mohd Rosli Mohd Hasan, Tai Guo, Hainian Wang, Zhanping You
Experimental Assessments Of Methanol-Based Foaming Agent In Latex Modified Foamed Binders And Warm Asphalt Mixtures, Mohd Rosli Mohd Hasan, Tai Guo, Hainian Wang, Zhanping You
Michigan Tech Publications
Latex is one of the natural rubbers that is used to enhance the performance of asphalt pavement for the last few decades. The presence of latex, which is categorized as an elastomer, helps to improve pavement performance and durability. Conversely, higher viscosity of latex modified asphalt binder increases the production-temperatures of asphalt mixture, thus consuming higher energy during asphalt mixture’s production stage. In this study, the effectiveness of methanol as an energy-efficient foaming agent was assessed to reduce the viscosity and enhance the workability of the modified asphalt binder. The basic and rheological properties of the asphalt binders were determined …
Asphalt Mixture With Scrap Tire Rubber And Nylon Fiber From Waste Tires: Laboratory Performance And Preliminary M‐E Design Analysis, Dongzhao Jin, Dongdong Ge, Xiaodong Zhou, Zhanping You
Asphalt Mixture With Scrap Tire Rubber And Nylon Fiber From Waste Tires: Laboratory Performance And Preliminary M‐E Design Analysis, Dongzhao Jin, Dongdong Ge, Xiaodong Zhou, Zhanping You
Michigan Tech Publications
Scrap tire rubber and nylon fiber are waste materials that could potentially be recycled and used to improve the mechanical properties of asphalt pavement. The objective of this research was to investigate the properties of scrap tire rubber and nylon fiber (R‐F) modified warm mix asphalt mixture (WMA). The high‐temperature performance was estimated by the Hamburg wheel-tracking testing (HWTT) device. The low‐temperature cracking performance was evaluated by the disk‐shaped compact tension (DCT) test and the indirect tensile strength (IDT) test. The stress and strain relationship was assessed by the dynamic modulus test at various temperatures and frequencies. The extracted asphalt …
Long Short-Term Memory Based Subsurface Drainage Control For Rainfall-Induced Landslide Prevention, Aynaz Biniyaz, Behnam Azmoon, Ye Sun, Zhen Liu
Long Short-Term Memory Based Subsurface Drainage Control For Rainfall-Induced Landslide Prevention, Aynaz Biniyaz, Behnam Azmoon, Ye Sun, Zhen Liu
Michigan Tech Publications
Subsurface drainage has been widely accepted to mitigate the hazard of landslides in areas prone to flooding. Specifically, the use of drainage wells with pumping systems has been recognized as an effective short-term solution to lower the groundwater table. However, this method has not been well considered for long-term purposes due to potentially high labor costs. This study aims to investigate the idea of an autonomous pumping system for subsurface drainage by leveraging con-ventional geotechnical engineering solutions and a deep learning technique—Long-Short Term Memory (LSTM)—to establish a geotechnical cyber-physical system for rainfall-induced landslide prevention. For this purpose, a typical soil …
Review On Applications Of Lignin In Pavement Engineering: A Recent Survey, Hui Yao, Yiran Wang, Junfu Liu, Mei Xu, Pengrui Ma, Jie Ji, Zhanping You
Review On Applications Of Lignin In Pavement Engineering: A Recent Survey, Hui Yao, Yiran Wang, Junfu Liu, Mei Xu, Pengrui Ma, Jie Ji, Zhanping You
Michigan Tech Publications
Lignin is the second-largest plant polymer on Earth after cellulose. About 98% of lignin produced in the papermaking and pulping industry is used for combustion heating or power generation. Less than 2% of lignin is used in more valuable fields, mainly in the formulation of dispersants, adhesives, and surfactants. Asphalt is one of the most important materials in pavement engineering. It is a dark brown complex mixture composed of hydrocarbons with different molecular weights and their non-metallic derivatives. Because the chemical structure of lignin is similar to that of asphalt, it is a carbon-based hydrocarbon material. More researchers studied the …