Developing a Testing Device for Total Pavements Acceptance PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Developing a Testing Device for Total Pavements Acceptance PDF full book. Access full book title Developing a Testing Device for Total Pavements Acceptance by Kenneth H. Stokoe. Download full books in PDF and EPUB format.
Author: Kenneth H. Stokoe Publisher: ISBN: Category : Nondestructive testing Languages : en Pages : 79
Book Description
During the fourth year of Project 0-6005, construction of the Total Pavement Acceptance Device (TPAD) was completed. The TPAD is a multi-function pavement evaluation device used to profile continuously along pavements at speeds in the range of 2 to 5 mph. The test functions include those associated with a Rolling Dynamic Deflectometer (RDD), ground penetrating radar (GPR), Distance Measurement Instrument (DMI), high-precision differential Global Positioning System (GPS), surface temperature and digital video imaging of the pavement, and right-of-way conditions. The towing frame system used to position and pull the RDD rolling sensors was developed and installed on the TPAD. The towing frame system minimizes the transmission of vibrations from the TPAD mobile platform and loading system to the rolling sensors, and allows for the incorporation of three rolling sensors (front, center, and rear) on the TPAD. The front and rear rolling sensors have 12.5-in. diameter wheels and a 90-lb hold-down weight while the center rolling sensor has 9.5-in. diameter wheels and a 40-lb hold-down weight. Initial deflection measurements using the new towing frame/sensor cart arrangement were performed at the Texas Department of Transportation (TxDOT) Flight Services Facility (FSF).
Author: Kenneth H. Stokoe Publisher: ISBN: Category : Nondestructive testing Languages : en Pages : 79
Book Description
During the fourth year of Project 0-6005, construction of the Total Pavement Acceptance Device (TPAD) was completed. The TPAD is a multi-function pavement evaluation device used to profile continuously along pavements at speeds in the range of 2 to 5 mph. The test functions include those associated with a Rolling Dynamic Deflectometer (RDD), ground penetrating radar (GPR), Distance Measurement Instrument (DMI), high-precision differential Global Positioning System (GPS), surface temperature and digital video imaging of the pavement, and right-of-way conditions. The towing frame system used to position and pull the RDD rolling sensors was developed and installed on the TPAD. The towing frame system minimizes the transmission of vibrations from the TPAD mobile platform and loading system to the rolling sensors, and allows for the incorporation of three rolling sensors (front, center, and rear) on the TPAD. The front and rear rolling sensors have 12.5-in. diameter wheels and a 90-lb hold-down weight while the center rolling sensor has 9.5-in. diameter wheels and a 40-lb hold-down weight. Initial deflection measurements using the new towing frame/sensor cart arrangement were performed at the Texas Department of Transportation (TxDOT) Flight Services Facility (FSF).
Author: Kenneth H. Stokoe Publisher: ISBN: Category : Nondestructive testing Languages : en Pages : 73
Book Description
During the second year of Project 0-6005, significant progress was made towards building the Total Pavement Acceptance Device (TPAD). The TPAD will be a multi-function device that will be used to profile continuously along pavements at speeds in the range of 5 to 10 mph. The test functions will include those associated with Rolling Dynamics Deflectometer (RDD), ground penetrating radar (GPR), Distance Measurement Instrument (DMI) and high-precision differential Global Positioning System (GPS), and surface temperature measurements, as well as digital video imaging of the pavement and right-of-way conditions. The specifications, bid documents, bid acceptances, and purchase of the TPAD mobile platform and the TPAD transportation equipment (tractor and trailer) were completed by the University of Texas Center for Transportation Research team. Construction of the TPAD is well underway and the acceptance testing will be done in early Year 3. Progress was also made in developing (1) improved rolling sensors and associated data analysis methods commensurate with the target testing speeds and (2) a second generation integrated data acquisition and display system which records all test functions on the same time and distance baselines.
Author: Jung Su Lee Publisher: ISBN: Category : Languages : en Pages : 402
Book Description
A Rolling Dynamic Deflectometer (RDD) is a nondestructive testing device for determining continuous deflection profiles of pavements. Theses deflection profiles can be used more effectively when combined with other data such as pavement thickness, variability in moisture and other subsurface conditions, void detection and pavement right-of-way conditions. Therefore, a new, multi-function pavement testing device has been developed by a joint effort between the Texas Department of Transportation (TxDOT), the Center for Transportation Research (CTR) at the University of Texas at Austin (UT) and the Texas A&M Transportation Institute (TTI) at Texas A&M University. This new device is called the Total Pavement Acceptance Device (TPAD). The objective of TPAD testing is to nondestructively and nonintrusively investigate the structural adequacy of the total pavement system. The multiple functions of the TPAD presently include the following measurement capabilities: (1) rolling dynamic deflectometer (RDD), (2) ground penetrating radar (GPR), (3) global positioning (GPS), (4) pavement surface temperature, (5) digital video imaging of pavement and right-of-way conditions and (6) longitudinal survey offsets from known points through distance measurement (DMI). The TPAD is currently designed to perform continuous measurements at speeds around 2 to 3 mph. The effort in this dissertation is directed at: (1) developing the fourth-generation rolling sensors for faster testing speeds with the TPAD, (2) developing the Jointed Concrete Pavement (JCP) testbed with known and well-documented conditions (3) developing and evaluating the TPAD mobile platform, (4) evaluating the performance of the fourth-generation rolling sensors and refining a field calibration procedure and (5) studying the influence of the longitudinal and transverse joints in Jointed Concrete Pavement on TPAD deflection profile measurements. The first part involved the study of previous research and preliminary testing using the second-generation rolling sensor. Key benefits of the fourth-generation rolling sensor are: (1) reduced rolling noise during the testing, (2) higher signal-to-noise ratio (SNR), and (3) better tracking of the sensor. The second part of this work involved the development of the JCP testbed at the Texas Department of Transportation (TxDOT), Flight Services Facility (FSF) adjacent to the Austin-Bergstrom International Airport (ABIA). The JCP testbed was developed to establish a pavement facility with known and well-documented conditions for use in future research dealing with rigid pavement testing. The third part of this work involved the acceptance testing of the TPAD mobile platform for the RDD deflection measurements. The mobile platform was the one of the key components to develop the new moving pavement testing device. The TPAD mobile platform was developed by modifying a small, off-road vibroseies built by Industrial Vehicle International, Inc. (IVI). Acceptance testing of each of the following components was performed: (1) automated speed control, (2) static loading system and (3) dynamic loading system. The fourth part of this work involved the TPAD deflection measurements at the testbed at the TxDOT FSF. The deflection profiles using the fourth-generation rolling sensors and TPAD were performed at the established testbed. During the performance evaluation testing, the new sensor positioning, towing and raising/lowering system was developed and installed in the TPAD. The fifth part of this study involved the deflection measurement using the TPAD-RDD system on the jointed concrete pavement. This study includes the repeatability of the TPAD deflection measurements, the influence of the proximity to the longitudinal and transverse joints in JCP on TPAD deflection measurements, deflection measurements under different pavement surface temperature, the characteristic of the TPAD-RDD deflections and the comparison between the Falling Weight Deflectometer and TPAD deflection measurement testing.
Author: Sherif Badawy Publisher: Springer Nature ISBN: 3030341968 Category : Technology & Engineering Languages : en Pages : 170
Book Description
This book brings together scientific experts in different areas that contribute to the design, analysis, and performance of sustainable pavements. This book also contributes to transportation engineering challenges and solutions, evaluate the state of the art, identify the shortcomings and opportunities for research, and promote the interaction with the industry. In particular, scientific topics that are addressed in this book include the use of different waste and recycled materials to improve pavement performance, pavement maintenance and rehabilitation, urban heat island due to transportation infrastructure and its mitigation techniques, machine learning applications in the prediction of pavement distresses, and analysis of pavement overlay.
Author: Frederick Hugo Publisher: ISBN: Category : Accelerated life testing Languages : en Pages : 106
Book Description
This report describes CTR Study 1246, which proved to be very dynamic, in that the initial objectives were not only met, but they were followed up by new objectives. This was due to decisions taken by the project steering committee during the execution of the project. Following initial exploratory studies in 1988, the Texas SDHPT initiated the present study through which a strategy for the acquisition of a mobile accelerated pavement testing device had to be developed. Initially, the study focussed on the feasibility of accelerated testing and the need for it in Texas. As part of the initial study, the relationship of accelerated testing to overall pavement engineering was reviewed in detail. Once the feasibility had been illustrated, the objectives were redirected to the acquisition of a mobile accelerated pavement device. The different available methods and machines were evaluated, and subsequently the Mobile Load Simulator (MLS) was selected for future application on pavements in the state of Texas.
Author: S.C. Bhargava Publisher: CRC Press ISBN: 0415621380 Category : Computers Languages : en Pages : 572
Book Description
This book, written for the benefit of engineering students and practicing engineers alike, is the culmination of the author's four decades of experience related to the subject of electrical measurements, comprising nearly 30 years of experimental research and more than 15 years of teaching at several engineering institutions. The unique feature of this book, apart from covering the syllabi of various universities, is the style of presentation of all important aspects and features of electrical measurements, with neatly and clearly drawn figures, diagrams and colour and b/w photos that illustrate details of instruments among other things, making the text easy to follow and comprehend. Enhancing the chapters are interspersed explanatory comments and, where necessary, footnotes to help better understanding of the chapter contents. Also, each chapter begins with a "recall" to link the subject matter with the related science or phenomenon and fundamental background. The first few chapters of the book comprise "Units, Dimensions and Standards"; "Electricity, Magnetism and Electromagnetism" and "Network Analysis". These topics form the basics of electrical measurements and provide a better understanding of the main topics discussed in later chapters. The last two chapters represent valuable assets of the book, and relate to (a) "Magnetic Measurements", describing many unique features not easily available elsewhere, a good study of which is essential for the design and development of most electric equipment – from motors to transformers and alternators, and (b) "Measurement of Non-electrical Quantities", dealing extensively with the measuring techniques of a number of variables that constitute an important requirement of engineering measurement practices. The book is supplemented by ten appendices covering various aspects dealing with the art and science of electrical measurement and of relevance to some of the topics in main chapters. Other useful features of the book include an elaborate chapter-by-chapter list of symbols, worked examples, exercises and quiz questions at the end of each chapter, and extensive authors' and subject index. This book will be of interest to all students taking courses in electrical measurements as a part of a B.Tech. in electrical engineering. Professionals in the field of electrical engineering will also find the book of use.
Author: United States. Congress. House. Committee on Appropriations. Subcommittee on Dept. of Transportation and Related Agencies Appropriations Publisher: ISBN: Category : United States Languages : en Pages : 1036
Author: Organisation for Economic Co-operation and Development Publisher: Organization for Economic Co-operation and Development ; Washington, D.C. : OECD Publications and Information Center ISBN: Category : Technology & Engineering Languages : en Pages : 112
Book Description
Full-scale pavement test facilities in OECD member countries including measurement of pavement deformation under heavy truck loads.
Author: Kenneth H. Stokoe
Author: Kenneth H. Stokoe
Author: Kenneth H. Stokoe
Author: Jung Su Lee
Author: Sherif Badawy
Author: Frederick Hugo
Author: S.C. Bhargava
Author: 
Author: United States. Congress. House. Committee on Appropriations. Subcommittee on Dept. of Transportation and Related Agencies Appropriations
Author: Organisation for Economic Co-operation and Development
Author: