Download or read book Development of a New Fatigue Performance Test Using the Hamburg Wheel Tracking Device written by Ali Sahraei Joubani and published by . This book was released on 2024 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objective of this study was to develop a new test that would be simple to conduct and analyze for evaluating resistance of asphalt mixtures to fatigue cracking. For this purpose, a piece of equipment known as the Hamburg Wheel Tracking Test (HWTT) was used. HWTT has been widely accepted as a reasonable and reliable test to evaluate the rutting and moisture damage performance of asphalt mixtures but its use for evaluating fatigue resistance of asphalt mixtures is relatively a new concept. Its use as a fatigue test is advantages over current laboratory fatigue tests because of the possibility of considering various underlying support layers when the specimen is subjected to repeated loading. Ability to assess the asphalt mixture fatigue resistance in a layered system under repeated loading and in a laboratory environment provides the opportunity to integrate material design and pavement structural design for optimum performance. In addition, this test is practically feasible as a routine test method in terms of reliability, equipment availability, and data processing efficiency. The tests were conducted on a two-layer structure with the asphalt concrete slab as the top layer and the neoprene or an unbound aggregate base as the underlying layer. Based on the numerical analysis, a width of 6 inches was selected as the optimum width for this study. However, the experiment also included the 4-inch width for comparison. The thickness of the slab was selected at three levels: 1.0, 1.5, and 2.0 inches, with the 1.5-inch thickness being the main thickness applied to most of the slabs. In an asphalt pavement structure, the surface layer is often designed at a thickness of 1.5 to 2.0 inches. These tests were based on strain amplitude growth corresponding to three defined stages during the test (Early, Middle, Late). The impact of several factors on the test results was investigated. Those factors included the slab width and thickness, the underlying support type and condition, temperature of the test, the speed of tracking, and the type of asphalt mixture. The experiment showed that as the slab thickness become smaller, the strain amplitude and its corresponding growth rate become larger, exhibiting a relatively higher rate of fatigue damage. Using the unbound aggregate base proved to be challenging because of difficulty in achieving a smooth, even surface. A smooth surface was required to ensure proper bond of the gauges and collection of the data. Using synthetic rubber neoprene provided a smooth base and delivered a more reliable dataset compared to the aggregate base in this study. As expected, temperature played a significant role in the experiment, as a higher initial strain amplitude was observed at elevated temperatures. A higher strain and increased strain growth rate were observed at lower loading speeds. After determining the appropriate dimensions, temperature, and underlying support, tests were conducted on six different asphalt mixes. Strain development was monitored at the bottom of the slab for each mix. From the data collected, a new fatigue life model was developed to evaluate the fatigue performance of asphalt pavements when tested under the conditions explored in this research. The fatigue life in this model is defined as the number of HWTT load cycles at which the strain amplitude doubles, or equivalently, when the stiffness is reduced to half. This determination is made under the premise that the test operates in stress control mode. It was found that the rate of growth in strain amplitude during the test increased considerably when the binder content in the mix was decreased, validating the importance of ensuring adequate binder content in the asphalt mix. The SMA mixture demonstrated a higher rate of strain amplitude increase compared to the dense-graded mixtures. The mix with 35% RAP content and a PG 64-22 binder delivered lower growth in strain amplitude compared with other mixes. The IDEAL-CT test was also performed to draw comparisons. However, based on the outcomes, it showed no correlation with the results of the newly developed fatigue test. Based on the growth of strain amplitude throughout the test, a fatigue life model was developed. The fatigue life can be determined using this model, based on the number of cycles, with a criterion of either a 50% reduction in stiffness or a doubling of the strain amplitude. Finally, a numerical model was developed, and the observed strain response demonstrated that this model is capable of predicting both the type of response and the magnitude of strain amplitude with relative accuracy.

Download or read book Asphalt Paving Technology 2015 written by Eugene Skok and published by DEStech Publications, Inc. This book was released on 2016-02-16 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent research on asphalt binder aging and rejuvenatorsKey data on asphalt performance and formulationsUpdates on tests and specificationsFully-searchable text on CD-ROM (included) This series volume comprises research papers and technical reports developed within the U.S.-based Association of Asphalt Paving Technologists. The book is divided into sessions focused on technology, specifications, cold recycling of RAP, and rejuvenators, with special emphasis on aging and on how rejuvenators are modeled, formulated and used to improve asphalt binders and prevent cracking. The CD-ROM displays figures and illustrations in articles in full color along with a title screen and main menu screen. Each user can link to all papers from the Table of Contents and Author Index and also link to papers and front matter by using the global bookmarks which allow navigation of the entire CD-ROM from every article. Search features on the CD-ROM can be by full text including all key words, article title, author name, and session title. The CD-ROM has Autorun feature for Windows 2000 with Service Pack 4 or higher products along with the program for Adobe Acrobat Reader with Search 11.0. One year of technical support is included with your purchase of this product.

Download or read book Improved Conditioning and Testing Procedures for HMA Moisture Susceptibility written by Mansour Solaimanian and published by Transportation Research Board. This book was released on 2007 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explores whether combining the environmental conditioning system with the simple performance test would provide a superior procedure for determining the moisture susceptibility of hot-mix asphalt (HMA).

Download or read book Correlation of Field Performance to Hamburg Wheel Tracking Device Results written by Yetkin Yildirim and published by . This book was released on 2001 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development and Application of Bituminous Materials for Civil Infrastructures written by Hui Yao and published by Frontiers Media SA. This book was released on 2021-10-22 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Introduction to Unmanned Aircraft Systems Second Edition written by Douglas M. Marshall and published by CRC Press. This book was released on 2015-10-26 with total page 1944 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proliferation of technological capability, miniaturization, and demand for aerial intelligence is pushing unmanned aerial systems (UAS) into the realm of a multi-billion dollar industry. This book surveys the UAS landscape from history to future applications. It discusses commercial applications, integration into the national airspace system (NAS), System function, operational procedures, safety concerns, and a host of other relevant topics. The book is dynamic and well-illustrated with separate sections for terminology and web- based resources for further information.

Download or read book Fatigue Testing and Analysis of Results written by Waloddi Weibull and published by Pergamon. This book was released on 1961 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue Testing and Analysis of Results discusses fundamental concepts of fatigue testing and results analysis. The book begins with a description of the symbols and nomenclature selected for the present book, mainly those proposed by the ASTM Committee E-9 on Fatigue. Fatigue testing methods are then discussed including routine tests, short-life and long-life tests, cumulative-damage tests, and abbreviated and accelerated tests. Separate chapters cover fatigue testing machines and equipment; instruments and measuring devices; and test pieces used in fatigue testing. The factors affecting tes.

Download or read book Development of the Texas Flexible Pavements Database written by and published by . This book was released on 2010 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hydraulic and Civil Engineering Technology VIII written by M. Yang and published by IOS Press. This book was released on 2023-12-21 with total page 1528 pages. Available in PDF, EPUB and Kindle. Book excerpt: All of us are dependent on a built environment constructed and maintained by civil and hydraulic engineers, and for those working in these fields, keeping up to date with the latest technological developments is vital for the safe and efficient design and operation of this infrastructure. This book presents the proceedings of HCET 2023, the 8th International Technical Conference on Frontiers of Hydraulic and Civil Engineering Technology, held from 25-27 September 2023 in Wuhan, China. HCET is an international conference which aims to enhance the development of hydraulic and civil engineering in China, with a focus on high-end, intelligent and green technologies. It seeks to do this by consolidating global wisdom and achievements and providing scientific support. HCET also offers an excellent opportunity for scientists, researchers and engineers from around the world to exchange their findings and discuss developments, establishing a basis for national and international collaboration. A total of 316 contributions were received for the 2023 edition, of which 187 were ultimately accepted after a rigorous review process and checks for quality and plagiarism. Topics covered include the research and development of concrete structure design and analysis; structural mechanics and structural engineering; building and future materials; hydraulic engineering; geological exploration and earthquake engineering; building technology; urban planning; road, bridge and traffic engineering; energy infrastructure; environmental engineering and advanced engineering technologies, and interdisciplinary sciences and applications. Covering a wide range of subjects related to hydraulic engineering and civil engineering technology and associated transdisciplinary sciences, the book will be of interest to all those working in the field.

Download or read book Report written by and published by . This book was released on 2007 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Manual for Design of Hot Mix Asphalt with Commentary written by and published by Transportation Research Board. This book was released on 2011 with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development of Methods to Control Cold Temperature and Fatigue Cracking for Asphalt Mixtures written by Pedro Romero and published by . This book was released on 2011 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pavement distresses caused by low and intermediate temperatures are a significant source of problems for highway agencies. While many tests have been developed to address this type of distress, few of them are considered practical for day to day operations. This report presents a methodology for controlling low temperature properties of asphalt mixtures by using the Bending Beam Rheometer (BBR).

Download or read book The Roles of Accelerated Pavement Testing in Pavement Sustainability written by José P. Aguiar-Moya and published by Springer. This book was released on 2016-09-15 with total page 877 pages. Available in PDF, EPUB and Kindle. Book excerpt: This compendium gathers the latest advances in the area of Accelerated Pavement Testing (APT), a means of testing full-scale pavement construction in an accelerated manner for structural deterioration in a very short term. Compiling novel research results presented at the 5th International Conference on Accelerated Pavement Testing, San Jose, Costa Rica, the volume serves as a timely and highly relevant resource for materials scientists and engineers interested in determining the performance of a pavement structure during its service life (10+ years) in a few weeks or months.

Download or read book Improved Mix Design Evaluation and Materials Management Practices for Hot Mix Asphalt with High Reclaimed Asphalt Pavement Content written by Randy Clark West and published by Transportation Research Board. This book was released on 2013 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB's National Cooperative Highway Research Program (NCHRP) Report 752: Improved Mix Design, Evaluation, and Materials Management Practices for Hot Mix Asphalt with High Reclaimed Asphalt Pavement Content describes proposed revisions to the American Association of State Highway and Transportation Officials (AASHTO) R 35, Superpave Volumetric Design for Hot Mix Asphalt, and AASHTO M 323, Superpave Volumetric Mix Design, to accommodate the design of asphalt mixtures with high reclaimed asphalt pavement contents.

Download or read book Pavement Design and Accelerated Testing 2004 written by National Research Council (U.S.). Transportation Research Board and published by . This book was released on 2004 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: "TRB℗s Transportation Research Record: Journal of the Transportation Research Board 1896 examines a mechanistic-empirical model to predict transverse joint faulting, a multilayer boundary-element method for evaluating top-down cracking in hot-mix asphalt pavements, and one-way and two-way directional heavy-vehicle simulator loading in this four-part volume on education tools, rigid pavements, flexible pavements, and accelerated pavement testing. The K. B. Woods Award-winning paper on design and construction of transportation facilities, ©Computer-Based Multimedia Pavement Training Tool for Self-Directed Learning,♯ by Stephen Muench and Joe Mahoney of the University of Washington, also appears in this TRR: Journal volume."--TRB website.

Download or read book Pavement Engineering written by Rajib B. Mallick and published by CRC Press. This book was released on 2022-12-30 with total page 819 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pavement Engineering: Principles and Practice examines a wide range of topics in asphalt and concrete pavements from soil preparation and structural design to life cycle costing and economic analysis. This updated Fourth Edition covers all concepts and practices of pavement engineering in terms of materials, design, and construction methods for both flexible and rigid pavements and includes the latest developments in recycling, sustainable pavement materials, and resilient infrastructure. New and updated topics include material characterization concepts and tests, pavement management concepts, probabilistic examples of life cycle cost analysis, end-of-life considerations, waste plastic in asphalt, pervious concrete, pavement monitoring instrumentation and data acquisition, and more. The latest updated references, state of the art reviews, and online resources have also been included.

Download or read book Hot Mix Asphalt Materials Mixture Design and Construction written by and published by . This book was released on 2009 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt: