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Impact Of High Rap Content On Structural And Performance Properties Of Asphalt Mixtures


Impact Of High Rap Content On Structural And Performance Properties Of Asphalt Mixtures
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Impact Of High Rap Content On Structural And Performance Properties Of Asphalt Mixtures


Impact Of High Rap Content On Structural And Performance Properties Of Asphalt Mixtures
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Author : Imad L. Al-Qadi
language : en
Publisher:
Release Date : 2012

Impact Of High Rap Content On Structural And Performance Properties Of Asphalt Mixtures written by Imad L. Al-Qadi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Pavements, Asphalt categories.




Evaluating The Effect Of High Rap Content On Asphalt Mixtures And Binders Fatigue Behavior


Evaluating The Effect Of High Rap Content On Asphalt Mixtures And Binders Fatigue Behavior
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Author : Umme Amina Mannan
language : en
Publisher:
Release Date : 2018

Evaluating The Effect Of High Rap Content On Asphalt Mixtures And Binders Fatigue Behavior written by Umme Amina Mannan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with Asphalt categories.


One of the main concerns with the application of reclaimed asphalt pavement (RAP) in the asphalt concrete pavement is fatigue cracking due to the stiffness increase with the addition of aged and stiff RAP binder. The purpose of this study is to evaluate fatigue performance of asphalt binder and mixtures with different RAP percentages (0, 15, 25, 35 and 40 %). Among these, 35 and 40 % RAP mixes are considered as high RAP content. This study describes the results of laboratory fatigue response of asphalt mixtures and extracted binders containing RAP to define the effect of RAP on the fatigue performance. To achieve this objective, mixes and binders were tested using the beam fatigue test and the time-sweep test, respectively. Test results were analyzed using two different fatigue approaches, reduction in stiffness and dissipated energy criteria. Results showed that a higher initial stiffness and initial dissipated energy initiate the fatigue failure faster. Since both binders and mixes show an increase in the stiffness and energy consumed per loading cycle with the addition of RAP, resulting mixes containing higher RAP have a very short fatigue life. Also, the fatigue endurance limit decreases drastically with the addition of RAP in the mix. The results comparing two different RAP sources showed that the RAP source has more prominent effect on the mix fatigue performance than the binder fatigue performance. Finally, the traditional fatigue life prediction model is modified to incorporate the effect of RAP in the fatigue equation. The modified regression model predicted reasonable fatigue life of the mixture with a coefficient of determination (R2) close to 1. The measured and predicted fatigue life results were found close to each other for both mix and binder containing RAP.



Influence Of High Rap On Binder Properties In Hot Mix Asphalt Of Northeast


Influence Of High Rap On Binder Properties In Hot Mix Asphalt Of Northeast
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Author : Donatas Zvirblis
language : en
Publisher:
Release Date : 2014

Influence Of High Rap On Binder Properties In Hot Mix Asphalt Of Northeast written by Donatas Zvirblis and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with Binders (Materials) categories.


The impact of recycled asphalt pavement (RAP) materials on pavement performance is an important topic of study in the asphalt industry due to environmental and cost benefits. A major issue with RAP is that many agencies are still reluctant to allow producers to use more than 10 to 20 percent RAP because of concerns that mixtures with higher RAP contents will be too stiff, less workable and prone to field failures. However, the recent increases in the cost of asphalt binder and the shrinking supplies of quality aggregate has made the use of higher RAP content in hot mix asphalt (HMA) mixtures a priority for the industry. In this study, eighteen plant produced mixtures were obtained from three locations in the Northeast: New York, New Hampshire and Vermont. These mixtures were produced using different RAP contents of 0%, 20%, 30% and 40%. The eighteen mixtures were carefully extracted using American Association of State Highway and Transportation (AASHTO) T164 method "A" using trichloroethyleneand recovered with AASHTO T170 procedure. The recovered binder was then tested using Direct Shear Rheometer (DSR) and Bending Beam Rheometer (BBR) with AASHTO T315 and T313 procedures respectively. The results obtained from these tests were used to determine the continuous grade of the binders. They were then analyzed and compared to one another. Master curves were created for each recovered binder with RHEA and the data obtained from DSR frequency sweet sequence with a 4mm plate. The data recovered from master curves were used to plot black space and, crossover frequency and R-value graphs to show age hardening of binder. This paper investigates the influence of high RAP on asphalt binder stiffness and ductility.



Hot Mix Asphalt Mixtures


Hot Mix Asphalt Mixtures
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Author :
language : en
Publisher:
Release Date : 1999

Hot Mix Asphalt Mixtures written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with categories.




Proceedings Of The Rilem International Symposium On Bituminous Materials


Proceedings Of The Rilem International Symposium On Bituminous Materials
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Author : Hervé Di Benedetto
language : en
Publisher: Springer Nature
Release Date : 2021-09-25

Proceedings Of The Rilem International Symposium On Bituminous Materials written by Hervé Di Benedetto and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-09-25 with Technology & Engineering categories.


This volume highlights the latest advances, innovations, and applications in bituminous materials and structures and asphalt pavement technology, as presented by leading international researchers and engineers at the RILEM International Symposium on Bituminous Materials (ISBM), held in Lyon, France on December 14-16, 2020. The symposium represents a joint effort of three RILEM Technical Committees from Cluster F: 264-RAP “Asphalt Pavement Recycling”, 272-PIM “Phase and Interphase Behaviour of Bituminous Materials”, and 278-CHA “Crack-Healing of Asphalt Pavement Materials”. It covers a diverse range of topics concerning bituminous materials (bitumen, mastics, mixtures) and road, railway and airport pavement structures, including: recycling, phase and interphase behaviour, cracking and healing, modification and innovative materials, durability and environmental aspects, testing and modelling, multi-scale properties, surface characteristics, structure performance, modelling and design, non-destructive testing, back-analysis, and Life Cycle Assessment. The contributions, which were selected by means of a rigorous international peer-review process, present a wealth of exciting ideas that will open novel research directions and foster new multidisciplinary collaborations.



Improved Mix Design Evaluation And Materials Management Practices For Hot Mix Asphalt With High Reclaimed Asphalt Pavement Content


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.



Laboratory Evaluation Of Asphalt Concrete Mixtures Containing High Contents Of Reclaimed Asphalt Pavement Rap And Binder


Laboratory Evaluation Of Asphalt Concrete Mixtures Containing High Contents Of Reclaimed Asphalt Pavement Rap And Binder
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Author :
language : en
Publisher:
Release Date : 2014

Laboratory Evaluation Of Asphalt Concrete Mixtures Containing High Contents Of Reclaimed Asphalt Pavement Rap And Binder 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 Asphalt categories.


This study investigated the effect of added asphalt binder content on the performance and volumetric properties of asphalt concrete mixtures containing reclaimed asphalt pavement (RAP) in the amounts of 0%, 20%, and 40%. A laboratory-produced mixture containing 100% RAP was also evaluated. Performance of the mixtures was evaluated based on three criteria: stiffness (dynamic modulus), fatigue resistance, and rutting resistance (flow number and asphalt pavement analyzer). Results showed that a 0.5% increase in binder content improved both the fatigue and rutting resistance of the 0% and 20% RAP mixtures with only slight (insignificant) decreases in dynamic modulus. However, the addition of various amounts of binder to the 40% RAP mixture led to a significant decrease in rutting resistance with little or no improvement to fatigue resistance. Volumetric analysis was performed on all of the mixtures, and detailed results are presented. Based on the results of the study, the authors recommend that the Virginia Department of Transportation supplement current asphalt mixture design procedures that are based on mixture volumetric properties with laboratory-mixture performance testing.



Simple Performance Tester For Superpave Mix Design


Simple Performance Tester For Superpave Mix Design
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Author : Ramon Francis Bonaquist
language : en
Publisher: Transportation Research Board
Release Date : 2003

Simple Performance Tester For Superpave Mix Design written by Ramon Francis Bonaquist 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 2003 with Medical categories.


The global response to COVID-19 has demonstrated the importance of vigilance and preparedness for infectious diseases, particularly influenza. There is a need for more effective influenza vaccines and modern manufacturing technologies that are adaptable and scalable to meet demand during a pandemic. The rapid development of COVID-19 vaccines has demonstrated what is possible with extensive data sharing, researchers who have the necessary resources and novel technologies to conduct and apply their research, rolling review by regulators, and public-private partnerships. As demonstrated throughout the response to COVID-19, the process of research and development of novel vaccines can be significantly optimized when stakeholders are provided with the resources and technologies needed to support their response. Vaccine Research and Development to Advance Pandemic and Seasonal Influenza Preparedness and Response focuses on how to leverage the knowledge gained from the COVID-19 pandemic to optimize vaccine research and development (R&D) to support the prevention and control of seasonal and pandemic influenza. The committee's findings address four dimensions of vaccine R&D: (1) basic and translational science, (2) clinical science, (3) manufacturing science, and (4) regulatory science.



Bituminous Mixtures And Pavements Viii


Bituminous Mixtures And Pavements Viii
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Author : A.F. Nikolaides
language : en
Publisher: CRC Press
Release Date : 2024-06-21

Bituminous Mixtures And Pavements Viii 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 2024-06-21 with Technology & Engineering categories.


Bituminous Mixtures and Pavements VIII contains 114 papers as presented at the 8th International Conference ‘Bituminous Mixtures and Pavements’ (8th ICONFBMP, 12-14 June 2024, Thessaloniki, Greece). The contributions reflect the research and practical experience of academics and practicing engineers from thirty-four (34) different countries, and cover a wide range of topics: Session I: Bitumen, Modified binders, Aggregates, and Subgrade Session II: Bituminous mixtures (Design, Construction, Testing, Performance) Session III: Pavements (Design, Construction, Maintenance, Sustainability, Energy and Environmental consideration) Session IV: Pavement management and Geosynthetics Session V: Pavement recycling Session VI: Pavement surface characteristics, Pavement performance monitoring, Safety Session VII: Biomaterials in pavement engineering Session VIII: Prediction models of pavement performance Bituminous Mixtures and Pavements VIII covers recent advances in highway materials technology and pavement engineering, and will be of interest to scientists and professionals involved or interested in these areas. The ICONFBMP-conferences have been organized every four years since 1992. This 8th conference was jointly organized by: Laboratory of Highway Engineering, Aristotle University of Thessaloniki, Greece; Built Environment Research Institute (BERI), University of Ulster, UK; University of Texas San Antonio (UTSA), USA; Laboratory for Advanced Construction Technology (LACT), Technological Institute of Iowa, USA; Technological University of Delft (TUDelft), The Netherlands, and University of Antwerp, (UA), Belgium.



Pavement And Asset Management


Pavement And Asset Management
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Author : Maurizio Crispino
language : en
Publisher: CRC Press
Release Date : 2019-02-21

Pavement And Asset Management written by Maurizio Crispino and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-02-21 with Technology & Engineering categories.


Pavement and Asset Management contains contributions from the World Conference on Pavement and Asset Management (WCPAM 2017, Baveno, Italy, 12-16 June 2017). For the first time, the European Pavement and Asset Management Conference (EPAM) and the International Conference on Managing Pavement Assets (ICMPA) were joining forces for a global event that aimed not only at academics and researchers, but also at practitioners, engineers and technicians dealing with everyday tasks and responsibilities related to transport infrastructures pavement and asset management. Pavement and Asset Management covers a wide range of topics, from emerging research to engineering practice, and is grouped under the following themes: - Data quality and monitoring - Economics, political and environmental management, strategies - Deterioration models - Key performance indicators - PMS-case studies - Design and materials - M&R treatments - LCA & LCCA - Risk and safety - Bridge and tunnel management - Smart infrastructure and IT Pavement and Asset Management will be valuable to academics and professionals interested and/or involved in issues related to transport infrastructures pavement and asset management.