Maximising The Re Use Of Reclaimed Asphalt Pavement
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Maximising The Re Use Of Reclaimed Asphalt Pavement
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Author :
language : en
Publisher:
Release Date : 2013
Maximising The Re Use Of Reclaimed Asphalt Pavement written by 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.
This report presents the findings from the first year of a three year Austroads study which aims to maximise the re-use of reclaimed asphalt pavement (RAP) in new asphalt product. The objective of this first year of study is to improve the methodology for the characterisation of RAP binders and the design of the binder blend in asphalt mixes containing RAP. The study included a literature survey of the current international state of practice in terms of RAP binder characterisation. It further included experiments to develop a more practical and cost-effective approach to characterising the properties of binder blends containing RAP. The experimental work showed that the Dynamic Shear Rheometer (DSR) can be used to obtain viscosity parameters similar to the Shell sliding plate viscosity at 45 C and the capillary viscosity at 60 C. The DSR results are also more repeatable than the results of the Shell sliding plate test, which has conventionally been a more common test used in Australia for the characterisation of RAP binder. The results show that for the RAP sources under study, a blend of C170 with 10% to 20% RAP does result in a viscosity equivalent to that of a C320, as generally accepted in current practice. The DSR based methodology used in this study provides a practical, consistent and cost-effective method to characterise RAP binder blends. As successfully demonstrated in this study, the viscosity results from the DSR tests can be used to design RAP binder blends to a desired viscosity. The methodology will be further validated during the next year of this study, when it will be used to design binder blends for asphalt mixes containing various percentages of RAP.
Recommended Use Of Reclaimed Asphalt Pavement In The Superpave Mix Design Method
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Author : Rebecca McDaniel
language : en
Publisher:
Release Date : 2001
Recommended Use Of Reclaimed Asphalt Pavement In The Superpave Mix Design Method written by Rebecca McDaniel and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Pavements, Asphalt categories.
The Use Of Reclaimed Asphalt Pavement In New Superpave Asphalt Concrete Mixtures
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Author :
language : en
Publisher:
Release Date : 2003
The Use Of Reclaimed Asphalt Pavement In New Superpave Asphalt Concrete 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 2003 with categories.
While the research and development of the SUPERPAVE asphalt mixture design and analysis system did address the use of polymer modified asphalt binders in the specification of material performance properties, no recommendations or procedural guidelines were given for the use of recycled materials. The use of recycled asphalt pavements (RAP) in new paving mixtures is not an innovative idea. RAP has been called one of the most recycled materials in the world, and its use in paving mixtures has been shown to have environmental, economic and performance benefits. In this study, four different RAP stockpiles were sampled and the characteristics of each RAP material were investigated in terms of binder content, aggregate gradation and the rheologic characteristics of the reclaimed RAP binder. The reclaimed RAP binders were blended with several different virgin performance graded binders in order to determine how RAP binder concentration affected the stiffness and performance grade of the RAP -- virgin binder blends. Recommendations were made on how to select virgin binder grade andor RAP concentration combinations to fulfill a project's binder grading requirements. The effects of RAP were also investigated in terms mixture design, and recommendations were made with regards to material handling and specimen fabrication procedures. Asphalt concrete mixtures containing RAP were characterized in terms of stiffness and resistance to plastic strain using SUPERPAVE testing methods, and the results of these tests were compared to those of virgin material mixtures. Assuming a simulated pavement cross section and traffic loading, the results of this performance testing were used in performance prediction models to estimate how pavements constructed with RAP would perform compared to those made from 100% virgin materials. The predicted performance of pavements containing up to 40% RAP (by weight) was found to be similar or slightly better than that of virgin material pavements.
Effects Of Reclaimed Asphalt Pavement On Mechanical Properties Of Base Materials
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Author : Dane A. Cooley
language : en
Publisher:
Release Date : 2005
Effects Of Reclaimed Asphalt Pavement On Mechanical Properties Of Base Materials written by Dane A. Cooley and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Electronic dissertations categories.
Reuse of reclaimed asphalt pavement (RAP) in the full-depth recycling (FDR) process is a cost-effective and environmentally responsible method of asphalt pavement reconstruction. Although FDR has been used for several years in some locations, the effect of RAP on the mechanical properties of recycled base materials has not been well documented. The purpose of this research was to investigate the influence of RAP on the mechanical properties of recycled base materials typical of northern Utah.
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.
Recommended Use Of Reclaimed Asphalt Pavement In The Superpave Mix Design Method
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Author : Transportation Research Board. National Cooperative Highway Research Program
language : en
Publisher:
Release Date : 2001
Recommended Use Of Reclaimed Asphalt Pavement In The Superpave Mix Design Method written by Transportation Research Board. National Cooperative Highway Research Program and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.
Application Of Reclaimed Asphalt Pavement And Recycled Asphalt Shingles In Hot Mix Asphalt
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Author :
language : en
Publisher:
Release Date : 2014
Application Of Reclaimed Asphalt Pavement And Recycled Asphalt Shingles In Hot Mix Asphalt 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 Electronic book categories.
Reclamation Of Reclaimed Asphalt Pavement Rap By Pyrolysis
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Author :
language : en
Publisher:
Release Date : 2003
Reclamation Of Reclaimed Asphalt Pavement Rap By Pyrolysis written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
Asphalt paving and resurfacing is largest component of the construction and maintenance cost for roadway infrastructure in U.S., representing approximately 20%. Around 91 million tons of asphalt waste is generated each year during resurfacing and widening projects. This waste asphalt is either disposed off by land filling or reused as Reclaimed Asphalt Pavement (RAP). The reuse rate is approximately 20 to 50%. However, the stringent quality requirements of Superpave system, quality variation of RAP millings limit the reuse of asphalt waste and can increase the pressure on already overcrowded landfills. Pyrolysis of RAP showed that the decomposition is a two-step process. Asphaltic volatile material is decomposed in the first step at lower temperatures and residual coke remains, which along with aggregates like limestone is pyrolyzed in the second stage at higher temperatures. Results show asphaltic volatile yield of around 5 6 10%. Energy analysis was done to determine the amount of energy required to heat the RAP material through the first step of weight loss. The kinetics of decomposition reactions were studied to obtain rate constants and activation energies which will be useful for large scale testing.
Research And Application Of Hot In Place Recycling Technology For Asphalt Pavement
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Author : Banting W.P. Sze
language : en
Publisher: Woodhead Publishing
Release Date : 2020-11-12
Research And Application Of Hot In Place Recycling Technology For Asphalt Pavement written by Banting W.P. Sze and has been published by Woodhead Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-11-12 with Technology & Engineering categories.
Research and Application of Hot In-Place Recycling Technology for Asphalt Pavement is the first comprehensive book on the topic that presents over two decades of theoretical and practical experience gained in China. The book gives comprehensive coverage of HIPR, including pavement evaluation, distress analysis, mix design, processes and equipment selection, implementation and acceptance criteria. In eight chapters, this book covers HIPR from theoretical and practical viewpoints, and provides detailed case-studies based on real-world experience. This book includes everything engineers need to apply HIPR to improve sustainability and reduce disruption during the maintenance and repair of asphalt. Presents, for the first time in English, decades of experience and research on Hot in-Place Recycling Technology (HIPR) for asphalt pavements Considers all aspects of HIPR, giving engineers all they need to use the technique for road maintenance and repair Details how HIPR drastically improves the sustainability of asphalt and reduces disruption to traffic during repair and maintenance work Includes detailed case studies from thirty years of HIPR in China, giving context and practical know-how
Use Of Reclaimed Asphalt Pavement And Recycled Asphalt Shingles In Asphalt Mixtures For Management Of Highway Assets
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Author : Mary Stroup-Gardiner
language : en
Publisher:
Release Date : 2016
Use Of Reclaimed Asphalt Pavement And Recycled Asphalt Shingles In Asphalt Mixtures For Management Of Highway Assets written by Mary Stroup-Gardiner and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with Bridges categories.
This report documents the state of the practice of state highway agencies related to their incorporation of life-cycle cost analysis (LCCA) and risk-based analysis into their asset management plans for pavements and bridges on the National Highway System. The objective of this project was to develop an inventory of quantitative asset-level, project-level, or corridor-level processes and models for predicting life-cycle costs associated with the preservation and replacement of highway assets. The report includes a literature review, a survey of highway agencies, and case studies that document specific highway agency experiences with LCCA.