The Experts below are selected from a list of 237 Experts worldwide ranked by ideXlab platform
Huimei Zhu - One of the best experts on this subject based on the ideXlab platform.
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properties of a steel slag permeable asphalt mixture and the reaction of the steel slag asphalt interface
Materials, 2019Co-Authors: Wenhuan Liu, Huimei ZhuAbstract:Steel slag is an industrial solid waste with the largest output in the world. It has the characteristics of wear resistance, good particle shape, large porosity, etc. At the same time, it has good adhesion characteristics with asphalt. If steel slag is used in asphalt pavement, it not only solves the problem of insufficient quality aggregates in asphalt concrete, but can also give full play to the high hardness and high wear resistance of steel slag to improve the performance of asphalt pavement. In this study, a steel slag aggregate was mixed with road petroleum asphalt to prepare a permeable steel slag–asphalt mixture, which was then compared with the permeable limestone–asphalt mixture. According to the Technical Regulations for Permeable Asphalt Pavement (CJJT 190-2012), the permeability, water stability, and Marshall stability of the prepared asphalt mixtures were tested and analyzed. In addition, the high-temperature stability and expansibility were analyzed according to the Experimental Regulations for Highway Engineering Asphalt and Asphalt Mixture (JTG E20-2011). The chemical composition of the steel slag was tested and analyzed by X-ray fluorescence spectrometer (XRF). The mineral composition of the steel slag was tested and analyzed by X-ray diffractometer (XRD). The asphalt was analyzed by Fourier transform infrared spectroscopy (FTIR). The results show that the steel slag asphalt permeable mixture had good permeability, water stability, and Marshall stability, as well as good high-temperature stability and a low expansion rate. The main mineral composition was ferroferric oxide, the RO phase (RO phase is a broad solid solution formed by melting FeO, MgO, and other divalent metal oxides such as MnO), dicalcium silicate, and tricalcium silicate. In the main chemical composition of steel slag, there was no chemical reaction between aluminum oxide, calcium oxide, silicon dioxide, and asphalt, while ferric oxide chemically reacted with asphalt and formed new organosilicon compounds. The main mineral composition of the steel slag (i.e., triiron tetroxide, dicalcium silicate, and tricalcium silicate) reacted chemically with the asphalt and produced new substances. There was no chemical reaction between the RO phase and asphalt.
Hojjat Adeli - One of the best experts on this subject based on the ideXlab platform.
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neural networks in civil Engineering 1989 2000
Computer-aided Civil and Infrastructure Engineering, 2001Co-Authors: Hojjat AdeliAbstract:The first journal article on neural network application in civil/structural Engineering was published by in this journal in 1989. This article reviews neural network articles published in archival research journals since then. The emphasis of the review is on the two fields of structural Engineering and construction Engineering and management. Neural networks articles published in other civil Engineering areas are also reviewed, including environmental and water resources Engineering, traffic Engineering, Highway Engineering, and geotechnical Engineering. The great majority of civil Engineering applications of neural networks are based on the simple backpropagation algorithm. Applications of other recent, more powerful and efficient neural networks models are also reviewed. Recent works on integration of neural networks with other computing paradigms such as genetic algorithm, fuzzy logic, and wavelet to enhance the performance of neural network models are presented.
Wenhuan Liu - One of the best experts on this subject based on the ideXlab platform.
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properties of a steel slag permeable asphalt mixture and the reaction of the steel slag asphalt interface
Materials, 2019Co-Authors: Wenhuan Liu, Huimei ZhuAbstract:Steel slag is an industrial solid waste with the largest output in the world. It has the characteristics of wear resistance, good particle shape, large porosity, etc. At the same time, it has good adhesion characteristics with asphalt. If steel slag is used in asphalt pavement, it not only solves the problem of insufficient quality aggregates in asphalt concrete, but can also give full play to the high hardness and high wear resistance of steel slag to improve the performance of asphalt pavement. In this study, a steel slag aggregate was mixed with road petroleum asphalt to prepare a permeable steel slag–asphalt mixture, which was then compared with the permeable limestone–asphalt mixture. According to the Technical Regulations for Permeable Asphalt Pavement (CJJT 190-2012), the permeability, water stability, and Marshall stability of the prepared asphalt mixtures were tested and analyzed. In addition, the high-temperature stability and expansibility were analyzed according to the Experimental Regulations for Highway Engineering Asphalt and Asphalt Mixture (JTG E20-2011). The chemical composition of the steel slag was tested and analyzed by X-ray fluorescence spectrometer (XRF). The mineral composition of the steel slag was tested and analyzed by X-ray diffractometer (XRD). The asphalt was analyzed by Fourier transform infrared spectroscopy (FTIR). The results show that the steel slag asphalt permeable mixture had good permeability, water stability, and Marshall stability, as well as good high-temperature stability and a low expansion rate. The main mineral composition was ferroferric oxide, the RO phase (RO phase is a broad solid solution formed by melting FeO, MgO, and other divalent metal oxides such as MnO), dicalcium silicate, and tricalcium silicate. In the main chemical composition of steel slag, there was no chemical reaction between aluminum oxide, calcium oxide, silicon dioxide, and asphalt, while ferric oxide chemically reacted with asphalt and formed new organosilicon compounds. The main mineral composition of the steel slag (i.e., triiron tetroxide, dicalcium silicate, and tricalcium silicate) reacted chemically with the asphalt and produced new substances. There was no chemical reaction between the RO phase and asphalt.
Lester A Hoel - One of the best experts on this subject based on the ideXlab platform.
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traffic Highway Engineering
2009Co-Authors: Nicholas J Garber, Lester A HoelAbstract:This book focuses on giving students insight into all facets of traffic and Highway Engineering. Students generally come to this course with little knowledge or understanding of the importance of transportation, much less of the extensive career opportunities within the field. Transportation is an extremely broad field, and courses must either cover all transportation modes or focus on specifics. While many topics can be covered with a survey approach, this often lacks sufficient depth and students leave the course without a full understanding of any of the fields. This text focuses exclusively on traffic and Highway Engineering beginning with a discussion of the pivotal role transportation plays in today’s society, including employment opportunities, historical impact, and the impact of transportation on our daily lives. This approach gives students a sense of what the field is about as well as an opportunity to consider some of its challenges. Later chapters focus on specific issues facing transportation engineers. The book uses tools such as working problems, diagrams and tables, reference material, and realistic examples to demonstrate how the material is applied.
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traffic and Highway Engineering third edition
2002Co-Authors: Nicholas J Garber, Lester A HoelAbstract:The book is designed for students in Engineering programs where introductory courses in transportation, Highway, or traffic Engineering are offered. The emphasis of this book is the area of traffic and Highway Engineering. The following chapters are included: The Profession of Transportation Engineering; Transportation Systems and Organizations; Characteristics of the Driver, the Pedestrian, the Vehicle, and the Road; Traffic Engineering Studies; Highway Safety; Fundamental Principles of Traffic Flow; Intersection Design; Intersection Control; Capacity and Level of Service of Two-Lane Highways, Multilane Highways, and Freeway Segments; Capacity and Level of Service at Signalized Intersections; the Transportation Planning Process; Forecasting Travel Demand; Evaluating Transportation Alternatives; Transportation Systems Management; Highway Surveys and Location; Geometric Design of Highway Facilities; Highway Drainage; Soil Engineering for Highway Design; Bituminous Materials; Design of Flexible Pavements; Design of Rigid Pavements; Pavement Management.
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traffic and Highway Engineering second edition
1997Co-Authors: Nicholas J Garber, Lester A HoelAbstract:This textbook, while intended primarily for use as an undergraduate text, can also serve as a reference for practicing transportation engineers and for students in graduate courses. The introductory chapters present material that will help students understand the basis for transportation, its importance in society, and the extent to which transportation pervades our daily lives. Later chapters present information about the basic areas in which transportation engineers work: traffic operations, planning, design, construction, and maintenance. The chapters are categorized into five parts: Part 1, Introduction; Part 2, Traffic Operations; Part 3, Transportation Planning; Part 4, Location, Geometrics, and Drainage; and Part 5, Materials and Pavements. The second edition reflects many changes that have occurred since the book was first published in 1988. Chapters have been added on safety and intersection design, and each chapter has been expanded and updated to reflect new methods, procedures, and technology. The number and variety of homework problems have been increased, and the chapters on Highway capacity have been updated to reflect the new Highway Capacity Manual. Recent references in traffic, planning, design, materials, and pavements have been added. An appendix has been added that compares new geometric design standards and formulas in metric units. An index is provided.
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traffic and Highway Engineering
1996Co-Authors: Nicholas J Garber, Lester A HoelAbstract:PART 1 - INTRODUCTION. 1. The Profession of Transportation Engineering - Importance of Transportation. Transportation History. Transportation Employment. Summary. Problems. References. 2. Transportation Systems and Organizations - Developing a Transportation System. Modes of Transportation. Transportation Organizations. Summary. Problems. References. PART 2 - TRAFFIC OPERATIONS. 3. Characteristics of the Driver, the Pedestrian, the Vehicle, and the Road - Driver Characteristics. Perception-Reaction Process. Older Drivers' Characteristics. Pedestrian Characteristics. Bicyclists and Bicycles Characteristics. Vehicle Characteristics. Road Characteristics. Summary. Problems. References. 4. Traffic Engineering Studies - Spot Speed Studies. Volume Studies. Travel Time and Delay Studies. Parking Studies. Summary. Problems. References. 5. Highway Safety - Issues Involved in Transportation Safety. Strategic Highway Safety Plans. Effectiveness of Safety Design Features. Summary. Problems. References. 6. Fundamental Principles of Traffic Flow - Traffic Flow Elements. Flow-Density Relationships. Shock Waves in Traffic Streams. Gap and Gap Acceptance. Introduction to Queuing Theory. Summary. Problems. 7. Intersection Design - Types of At-Grade Intersections. Design Principles for At-Grade Intersections. Design of Railroad Grade Crossings. Summary. Problems. References. 8. Intersection Control - General Concepts of Traffic Control. Conflict Points at Intersections. Types of Intersection Control. Signal Timing for Different Color Indications. Freeway Ramps. Summary. Problems. References. 9. Capacity and Level of Service: Two-Lane and Multilane Highways - Two-Lane Highways. Freeways. Multilane Highways. Summary. Problems. References. Appendix: Tables. 10. Capacity and Level of Service at Signalized Intersections - Definitions of Some Common Terms. Level of Service at Signalized Intersections. Summary. Problems. References. Appendix:Tables. PART 3 - TRANSPORTATION PLANNING. 11. The Transportation Planning Process - Basic Elements of Transportation Planning. Transportation Planning Institutions. Urban Transportation Planning. Forecasting Travel. Summary. Problems. References. 12. Forecasting Travel Demand - Demand Forecasting Approaches. Trip Generation. Trip Distribution. Mode Choice. Traffic Assignment. Other Methods for Forecasting Demand. Estimating Freight Demand. Traffic Impact Studies. Summary. Problems. References. 13. Evaluating Transportation Alternatives - Basic Issues in Evaluation. Evaluation Based on Economic Criteria. Evaluation Based on Multiple Criteria. Summary. Problems. References. PART 4 - LOCATION, GEOMETRICS, AND DRAINAGE. 14. Highway Surveys and Location - Principles of Highway Location. Highway Survey Methods. Highway Earthwork and Final Plans. Summary. Problems. References. 15. Geometric Design of Highway Facilities - Factors Influencing Highway Design. Design of the Alignment. Special Facilities for Heavy Vehicles on Steep Grades. Bicycle Facilities. Parking Facilities. Computer Use in Geometric Design. Summary. Problems. References. 16. Highway Drainage - Surface Drainage. Highway Drainage Structures. Sediment and Erosion Control. Hydrologic Considerations. Unit Hydrographs. Hydraulic Design of Highway Drainage Structures. Subsurface Drainage. Economic Analysis. Summary. Problems. References. Additional Readings . HPART 5 - MATERIALS AND PAVEMENTS. 17. Soil Engineering for Highway Design - Soil Characteristics. Basic Engineering Properties of Soils. Classification of Soils for Highway Use. Soil Surveys for Highway Construction. Soil Compaction. Special Soil Tests for Pavement Design. Frost Action in Soils. Summary. Problems. References. 18. Bituminous Materials - Sources of Asphalt. Description and Uses of Bituminous Binders. Properties of Asphalt Materials. Tests for Asphalt Materials. Asphalt Mixtures. Superpave Systems. Summary. Problems. References . 19. Design of Flexible Pavements - Structural Components of a Flexible Pavement. Soil Stabilization. General Principles of Flexible Pavement Design. Summary. Problems. References. 20. Design of Rigid Pavements - Materials Used in Rigid Pavements. Joints in Concrete Pavements. Types of Rigid Highway Pavements. Pumping of Rigid Pavements. Thickness Design of Rigid Pavements. Summary. Problems. References. 21. Pavement Management - Problems of Highway Rehabilitation. Methods for Determining Roadway Condition. Pavement Condition Prediction. Pavement Rehabilitation. Pavement Rehabilitation Programming. GIS and Pavement Management. Summary. Problems. References. Appendixes. Index.
Nicholas J Garber - One of the best experts on this subject based on the ideXlab platform.
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traffic Highway Engineering
2009Co-Authors: Nicholas J Garber, Lester A HoelAbstract:This book focuses on giving students insight into all facets of traffic and Highway Engineering. Students generally come to this course with little knowledge or understanding of the importance of transportation, much less of the extensive career opportunities within the field. Transportation is an extremely broad field, and courses must either cover all transportation modes or focus on specifics. While many topics can be covered with a survey approach, this often lacks sufficient depth and students leave the course without a full understanding of any of the fields. This text focuses exclusively on traffic and Highway Engineering beginning with a discussion of the pivotal role transportation plays in today’s society, including employment opportunities, historical impact, and the impact of transportation on our daily lives. This approach gives students a sense of what the field is about as well as an opportunity to consider some of its challenges. Later chapters focus on specific issues facing transportation engineers. The book uses tools such as working problems, diagrams and tables, reference material, and realistic examples to demonstrate how the material is applied.
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traffic and Highway Engineering third edition
2002Co-Authors: Nicholas J Garber, Lester A HoelAbstract:The book is designed for students in Engineering programs where introductory courses in transportation, Highway, or traffic Engineering are offered. The emphasis of this book is the area of traffic and Highway Engineering. The following chapters are included: The Profession of Transportation Engineering; Transportation Systems and Organizations; Characteristics of the Driver, the Pedestrian, the Vehicle, and the Road; Traffic Engineering Studies; Highway Safety; Fundamental Principles of Traffic Flow; Intersection Design; Intersection Control; Capacity and Level of Service of Two-Lane Highways, Multilane Highways, and Freeway Segments; Capacity and Level of Service at Signalized Intersections; the Transportation Planning Process; Forecasting Travel Demand; Evaluating Transportation Alternatives; Transportation Systems Management; Highway Surveys and Location; Geometric Design of Highway Facilities; Highway Drainage; Soil Engineering for Highway Design; Bituminous Materials; Design of Flexible Pavements; Design of Rigid Pavements; Pavement Management.
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traffic and Highway Engineering second edition
1997Co-Authors: Nicholas J Garber, Lester A HoelAbstract:This textbook, while intended primarily for use as an undergraduate text, can also serve as a reference for practicing transportation engineers and for students in graduate courses. The introductory chapters present material that will help students understand the basis for transportation, its importance in society, and the extent to which transportation pervades our daily lives. Later chapters present information about the basic areas in which transportation engineers work: traffic operations, planning, design, construction, and maintenance. The chapters are categorized into five parts: Part 1, Introduction; Part 2, Traffic Operations; Part 3, Transportation Planning; Part 4, Location, Geometrics, and Drainage; and Part 5, Materials and Pavements. The second edition reflects many changes that have occurred since the book was first published in 1988. Chapters have been added on safety and intersection design, and each chapter has been expanded and updated to reflect new methods, procedures, and technology. The number and variety of homework problems have been increased, and the chapters on Highway capacity have been updated to reflect the new Highway Capacity Manual. Recent references in traffic, planning, design, materials, and pavements have been added. An appendix has been added that compares new geometric design standards and formulas in metric units. An index is provided.
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traffic and Highway Engineering
1996Co-Authors: Nicholas J Garber, Lester A HoelAbstract:PART 1 - INTRODUCTION. 1. The Profession of Transportation Engineering - Importance of Transportation. Transportation History. Transportation Employment. Summary. Problems. References. 2. Transportation Systems and Organizations - Developing a Transportation System. Modes of Transportation. Transportation Organizations. Summary. Problems. References. PART 2 - TRAFFIC OPERATIONS. 3. Characteristics of the Driver, the Pedestrian, the Vehicle, and the Road - Driver Characteristics. Perception-Reaction Process. Older Drivers' Characteristics. Pedestrian Characteristics. Bicyclists and Bicycles Characteristics. Vehicle Characteristics. Road Characteristics. Summary. Problems. References. 4. Traffic Engineering Studies - Spot Speed Studies. Volume Studies. Travel Time and Delay Studies. Parking Studies. Summary. Problems. References. 5. Highway Safety - Issues Involved in Transportation Safety. Strategic Highway Safety Plans. Effectiveness of Safety Design Features. Summary. Problems. References. 6. Fundamental Principles of Traffic Flow - Traffic Flow Elements. Flow-Density Relationships. Shock Waves in Traffic Streams. Gap and Gap Acceptance. Introduction to Queuing Theory. Summary. Problems. 7. Intersection Design - Types of At-Grade Intersections. Design Principles for At-Grade Intersections. Design of Railroad Grade Crossings. Summary. Problems. References. 8. Intersection Control - General Concepts of Traffic Control. Conflict Points at Intersections. Types of Intersection Control. Signal Timing for Different Color Indications. Freeway Ramps. Summary. Problems. References. 9. Capacity and Level of Service: Two-Lane and Multilane Highways - Two-Lane Highways. Freeways. Multilane Highways. Summary. Problems. References. Appendix: Tables. 10. Capacity and Level of Service at Signalized Intersections - Definitions of Some Common Terms. Level of Service at Signalized Intersections. Summary. Problems. References. Appendix:Tables. PART 3 - TRANSPORTATION PLANNING. 11. The Transportation Planning Process - Basic Elements of Transportation Planning. Transportation Planning Institutions. Urban Transportation Planning. Forecasting Travel. Summary. Problems. References. 12. Forecasting Travel Demand - Demand Forecasting Approaches. Trip Generation. Trip Distribution. Mode Choice. Traffic Assignment. Other Methods for Forecasting Demand. Estimating Freight Demand. Traffic Impact Studies. Summary. Problems. References. 13. Evaluating Transportation Alternatives - Basic Issues in Evaluation. Evaluation Based on Economic Criteria. Evaluation Based on Multiple Criteria. Summary. Problems. References. PART 4 - LOCATION, GEOMETRICS, AND DRAINAGE. 14. Highway Surveys and Location - Principles of Highway Location. Highway Survey Methods. Highway Earthwork and Final Plans. Summary. Problems. References. 15. Geometric Design of Highway Facilities - Factors Influencing Highway Design. Design of the Alignment. Special Facilities for Heavy Vehicles on Steep Grades. Bicycle Facilities. Parking Facilities. Computer Use in Geometric Design. Summary. Problems. References. 16. Highway Drainage - Surface Drainage. Highway Drainage Structures. Sediment and Erosion Control. Hydrologic Considerations. Unit Hydrographs. Hydraulic Design of Highway Drainage Structures. Subsurface Drainage. Economic Analysis. Summary. Problems. References. Additional Readings . HPART 5 - MATERIALS AND PAVEMENTS. 17. Soil Engineering for Highway Design - Soil Characteristics. Basic Engineering Properties of Soils. Classification of Soils for Highway Use. Soil Surveys for Highway Construction. Soil Compaction. Special Soil Tests for Pavement Design. Frost Action in Soils. Summary. Problems. References. 18. Bituminous Materials - Sources of Asphalt. Description and Uses of Bituminous Binders. Properties of Asphalt Materials. Tests for Asphalt Materials. Asphalt Mixtures. Superpave Systems. Summary. Problems. References . 19. Design of Flexible Pavements - Structural Components of a Flexible Pavement. Soil Stabilization. General Principles of Flexible Pavement Design. Summary. Problems. References. 20. Design of Rigid Pavements - Materials Used in Rigid Pavements. Joints in Concrete Pavements. Types of Rigid Highway Pavements. Pumping of Rigid Pavements. Thickness Design of Rigid Pavements. Summary. Problems. References. 21. Pavement Management - Problems of Highway Rehabilitation. Methods for Determining Roadway Condition. Pavement Condition Prediction. Pavement Rehabilitation. Pavement Rehabilitation Programming. GIS and Pavement Management. Summary. Problems. References. Appendixes. Index.