Integrated Asphalt Overlay Mixture Design Balancing Rutting And Cracking Requirements
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Integrated Asphalt Overlay Mixture Design Balancing Rutting And Cracking Requirements
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Author : Fujie Zhou
language : en
Publisher:
Release Date : 2006
Integrated Asphalt Overlay Mixture Design Balancing Rutting And Cracking Requirements written by Fujie Zhou and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Pavements categories.
Overlay Tester
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Author : Fujie Zhou
language : en
Publisher:
Release Date : 2005
Overlay Tester written by Fujie Zhou and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Pavements categories.
The focus of many asphalt mixture design procedures over the past 10 years has led to the development of stiffer, drier mixtures. However, these mixes are more difficult to construct and are potentially more prone to reflective cracking. In this research the upgraded overlay tester is introduced and proposed as a simple performance test on reflective cracking. The overlay tester can be run on standard size samples, typically 6 in (150 mm) long by 3 in (75 mm) wide by 1.5 in (38 mm) high. These specimens can be prepared from either field cores or from Superpave Gyratory Compactor (SGC) molded specimens. The test is rapid and repeatable, and poor samples fail in minutes. It characterizes both crack initiation and crack propagation properties of asphalt mixtures. Based on repeatability study results, three replicates are recommended for the overlay tester. Sensitivity studies indicate that the overlay tester provides reasonable test results. Increasing asphalt content will significantly improve the reflective cracking resistance of asphalt mixtures. In a series of tests on Texas mixtures, it was determined that aggregate absorption has a major impact on the performance of specimens in the overlay tester. This topic has not received much attention recently but it obviously needs to be investigated. In the lab these highly absorptive aggregates did not severely impact the rutting performance but they had a major impact on cracking life. The effectiveness of the overlay tester was validated by five case studies in Texas. The overlay tester results all correlated well with the field performance. Furthermore, the overlay tester results have good correlations with beam fatigue test results and low temperature performance of asphalt mixtures in the field. A preliminary framework of asphalt overlay mixture designs and associated criteria have been proposed. Based on the framework, two examples of asphalt overlay mixture designs are presented in this report. This framework and the associated criteria are preliminary and they will need further refinement. Finally, a brand new overlay tester has been manufactured and delivered to TxDOTs central lab at the edar Park office. In addition, training for the operation and analysis has been provided.
Asphalt Paving Technology 2014
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Author : Eugene Skok
language : en
Publisher: DEStech Publications, Inc
Release Date : 2015-02-10
Asphalt Paving Technology 2014 written by Eugene Skok and has been published by DEStech Publications, Inc this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-02-10 with Technology & Engineering categories.
New developments in asphalt with bio-oil, rubber and polymer componentsEmpirical data and models on binders, aggregates, RAP, WMA, HMA for pavementSpecial section on asphalt paving research in IndiaFully-searchable text on CD-ROM (included) The latest volume of the AAPT series features over two dozen research presentations devoted to the chemistry, engineering, modeling and testing of asphalt materials and processing. Developments in the use of components like bio-oil are discussed, as are strategies for testing asphalt components for wear and durability at low and high temperatures. The book offers new data on the performance of reclaimed/recycled materials in asphalt paving. A special section focuses exclusively on discussions of binder modifications. 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.
Asphalt Paving Technology 2012
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Author : Eugene Skok
language : en
Publisher: DEStech Publications, Inc
Release Date : 2012-12-21
Asphalt Paving Technology 2012 written by Eugene Skok and has been published by DEStech Publications, Inc this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-21 with Science categories.
This book comprises over 30 new and not previously published technical papers from the Association of Asphalt Paving Technologists on all phases of asphalt research and applications, including mixing, mixture elements, and testing. Includes an accompanying CD-ROM.
Long And Deep Tunnels
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Author : Vittorio Guglielmetti
language : en
Publisher: CRC Press
Release Date : 2016-04-15
Long And Deep Tunnels written by Vittorio Guglielmetti and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-04-15 with Technology & Engineering categories.
The design and construction of “long and deep” tunnels, i.e. tunnels under mountains, characterised by either considerable length and/or overburden, represent a considerable challenge. The scope of this book is not to instruct how to design and construct such tunnels but to share a method to identify the potential hazards related to the process of designing and constructing long and deep tunnels, to produce a relevant comprehensive analysis and listing, to quantify the probability and consequences, and to design proper mitigation measures and countermeasures. The design, developed using probabilistic methods, is verified during execution by means of the so called Plan for Advance of the Tunnel (PAT) method, which allows adapting the design and control parameters of the future stretches of the tunnel to the results of the stretches already finished, using the monitoring data base. Numerous criteria are given to identify the key parameters, necessary for the PAT procedure. Best practices of excavation management with the help of real time monitoring and control are also provided. Furthermore cost and time evaluation systems are analysed. Finally, contractual aspects related to construction by contract are investigated, for best development and application of models more appropriate for tunnelling-construction contracts. The work will be of interest to practising engineers, designers, consultants and students in mining, underground, tunnelling, transportation and construction engineering, as well as to foundation and geological engineers, urban planners/developers and architects.
Guidelines For Evaluation Of Existing Pavements For Hma Overlay
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Author : Fujie Zhou
language : en
Publisher:
Release Date : 2007
Guidelines For Evaluation Of Existing Pavements For Hma Overlay written by Fujie Zhou and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Nondestructive testing categories.
Analysis Of Rutting Performance Impacting Factors In Hma Overlay Mixture Design
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Author : Sheng Hu
language : en
Publisher:
Release Date : 2011
Analysis Of Rutting Performance Impacting Factors In Hma Overlay Mixture Design written by Sheng Hu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Asphalt categories.
It is reasonable to assume that hot-mix asphalt (HMA) overlay rutting occurs only in HMA overlay(s) because of rutting from the existing pavement, if any, most of which had already occurred before the HMA overlay(s) was placed. So, this paper focuses only on the HMA overlay itself. Many factors?such as the asphalt binder grade, the aggregate gradation, the types of aggregates, the volumetric parameters of the mixtures, etc.?potentially influence the HMA rutting performance when designing an HMA overlay mix. In this paper, a Hamburg Wheel Tracking Test (HWTT) device is employed in order to evaluate the rutting performance of HMA overlay mixes in terms of the rut depth at specified wheel passes. An experimental design is developed to cover the different combinations of aggregates, gradations, and asphalt binder types. Through extensive laboratory tests and statistical analyses, the most significant impacting factors were identified. The corresponding HWTT rut depth prediction models were developed with high R2 values (>0.80). With these models and established rut depth criteria, the maximum allowable asphalt content that can be used without causing rutting problems was estimated for different overlay mixes. Furthermore, the models and estimated maximum allowable asphalt content were preliminarily verified by performance data of the National Center for Asphalt Technology test track sections and WesTrack test sections.
Superpave Mix Design
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Author : Asphalt Institute
language : en
Publisher:
Release Date : 2001-01-01
Superpave Mix Design written by Asphalt Institute and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001-01-01 with Asphalt categories.
Transverse Cracking Of Asphalt Pavements
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Author :
language : en
Publisher:
Release Date : 1982
Transverse Cracking Of Asphalt Pavements written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with Pavements, Asphalt categories.
This report summarizes the analysis of transverse cracking in asphalt pavement by a five state study team from Iowa, Kansas, Nebraska, North Dakota, and Oklahoma. The study was initiated under the sponsorship of the Federal Highway Administration and four evaluation conferences were held during the course of the study. Each state conducted a crack inventory on their asphalt pavement. An effort was made to correlate this inventory with numerous factors that were considered to be pertinent to the cracking problem. One state did indicate that there was a correlation between transverse cracking severity and the subsurface geology. The other states were unable to identify any significant factors as being the primary contributors. The analysis of the problem was divided into, (1) mix design, (2) maintenance, and (3) 3R rehabilitation. Many potential factors to be considered were identified under each of these three study divisions.
Journal Of The Association Of Asphalt Paving Technologists
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Author :
language : en
Publisher:
Release Date : 2005
Journal Of The Association Of Asphalt Paving Technologists written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Asphalt industry categories.