Analysis Of Rutting Performance Impacting Factors In Hma Overlay Mixture Design
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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.
Statistical Analysis Of Rutting Behavior Of Hma Mix Designs
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Author : James A. Crovetti
language : en
Publisher:
Release Date : 1999
Statistical Analysis Of Rutting Behavior Of Hma Mix Designs written by James A. Crovetti and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Pavements, Asphalt categories.
Refinement Of Current Wisdot Hma Mixture Application Guidelines Related To Nmas And Aggregate Characteristics
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Author : Donald W. Christensen
language : en
Publisher:
Release Date : 2013
Refinement Of Current Wisdot Hma Mixture Application Guidelines Related To Nmas And Aggregate Characteristics written by Donald W. Christensen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with Pavements, Asphalt categories.
Hot Mix Asphalt Design To Optimize Construction And Rutting Performance Properties
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Author :
language : en
Publisher:
Release Date : 2014
Hot Mix Asphalt Design To Optimize Construction And Rutting Performance Properties written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.
The first part of this dissertation is focused on comparing the mechanisms and fundamental properties that control the performance of asphalt mixtures during the uniaxial flow number testing. It is shown that aggregate packing, as measured using an image analysis method, is the key property affecting the failure and deformation characteristics in uniaxial testing. Additionally, it is shown that the main cause of tertiary flow of mixtures in the flow number test is structural instability and bulging (dilation) of aggregate skeleton. It is observed that dense graded mixtures with better aggregate packing showed a better rutting performance due to two principal mechanisms: first, lower stress level within the binder phase during loading due to aggregate skeleton serving as the main stress path, and second, the aggregates in proximity or contact showed a supporting structure (higher aggregate particle stability), which delays the tertiary flow in material, and reduces the rate of permanent deformation. The second part of this dissertation is focused on the mechanisms and factors controlling aggregate mobility and structure formation during compaction and their application for optimization of the construction process and for the development of a performance based mix design methodology. It is shown that for sufficient packing of aggregates during compaction, the viscosity of mastic should be low enough for lubrication, but high enough to prevent dry contacts of aggregates before the required aggregate packing is obtained. Depending on the stress state at the proximity zone of aggregates, there is a minimum mastic viscosity that is required to provide sufficient film thickness to prevent locking of the mixture at the early stage of compaction. A set of recommendations are proposed to estimate the optimum conditions for effective packing of aggregates. Based on the recommendations it is shown that packing of mixtures (as measured by total proximity zone length between aggregates) is a function of mastic viscosity, aggregate gradation, and compaction effort. The levels of these factors can be selected in order to achieve the required packing characteristic that is suitable for the design traffic loading.
Impact Of Design Features On Pavement Response And Performance In Rehabilitated Flexible And Rigid Pavements
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Author :
language : en
Publisher:
Release Date : 2011
Impact Of Design Features On Pavement Response And Performance In Rehabilitated Flexible And Rigid 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 2011 with Pavements categories.
The primary focus of this research was to determine the effects of design and construction features, such as overlay thickness and mix type, presence of milling, and type of restoration, on pavement response and performance and to establish their importance in the prediction of future performances of rehabilitated pavements. Long-Term Pavement Performance program Specific Pavement Study (SPS)-5 and SPS-6 experiments provided information to obtain a better understanding of the effects of design and construction features on pavement response and performance of rehabilitated flexible and rigid pavements.
Significant Findings From Full Scale Accelerated Pavement Testing
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Author : Wynand JvdM. Steyn
language : en
Publisher: Transportation Research Board
Release Date : 2012
Significant Findings From Full Scale Accelerated Pavement Testing written by Wynand JvdM. Steyn and has been published by Transportation Research Board this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Technology & Engineering categories.
"TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 433: Significant Findings from Full-Scale Accelerated Pavement Testing documents and summarizes significant findings from the various experimental activities associated with full-scale accelerated pavement testing (f-sAPT) programs that have taken place between 2000 and 2011. The report also identifies gaps in knowledge related to f-sAPT and where future research may be needed. NCHRP Synthesis 433 is designed to expand the f-sAPT base of knowledge documented in NCHRP Syntheses 325 and 235, both with the same title of Significant Findings from Full-Scale Accelerated Pavement Testing. f-sAPT is the controlled application of a wheel loading, at or above the appropriate legal load limit, to a pavement system to determine pavement response in a compressed time period. The acceleration of damage is achieved by one or more of the following factors: increased repetitions, modified loading conditions, imposed climatic conditions, and thinner pavements with a decreased structural capacity which have shorter design lives"--
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.
Guidelines For The Preservation Of High Traffic Volume Roadways
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Author : David G. Peshkin
language : en
Publisher: Transportation Research Board
Release Date : 2011
Guidelines For The Preservation Of High Traffic Volume Roadways written by David G. Peshkin and has been published by Transportation Research Board this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Technology & Engineering categories.
TRB's second Strategic Highway Research Program (SHRP 2) Report S2-R26-RR-2: Guidelines for the Preservation of High-Traffic-Volume Roadways explores the state of the practice for preservation treatments on high- and low-volume asphalt and concrete roadways. The report also includes suggested guidelines on the application of preservation treatments on high-volume roadways.
Bituminous Mixtures And Pavements Vii
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Author : A.F. Nikolaides
language : en
Publisher: CRC Press
Release Date : 2019-05-24
Bituminous Mixtures And Pavements Vii written by A.F. Nikolaides and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-05-24 with Technology & Engineering categories.
Highway engineers are facing the challenge not only to design and construct sustainable and safe pavements properly and economically. This implies a thorough understanding of materials behaviour, their appropriate use in the continuously changing environment, and implementation of constantly improved technologies and methodologies. Bituminous Mixtures and Pavements VII contains more than 100 contributions that were presented at the 7th International Conference ‘Bituminous Mixtures and Pavements’ (7ICONFBMP, Thessaloniki, Greece 12-14 June 2019). The papers cover a wide range of topics: - Bituminous binders - Aggregates, unbound layers and subgrade - Bituminous mixtures (Hot, Warm and Cold) - Pavements (Design, Construction, Maintenance, Sustainability, Energy and environment consideration) - Pavement management - Pavement recycling - Geosynthetics - Pavement assessment, surface characteristics and safety - Posters Bituminous Mixtures and Pavements VII reflects recent advances in highway materials technology and pavement engineering, and will be of interest to academics and professionals interested or involved in these areas.
Improved Mix Design Evaluation And Materials Management Practices For Hot Mix Asphalt With High Reclaimed Asphalt Pavement Content
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Author : Randy Clark West
language : en
Publisher: Transportation Research Board
Release Date : 2013
Improved Mix Design Evaluation And Materials Management Practices For Hot Mix Asphalt With High Reclaimed Asphalt Pavement Content written by Randy Clark West and has been published by Transportation Research Board this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with Pavements, Asphalt categories.
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.