Investigation Of Asphalt Pavement Mixture Blending Utilizing Analytical Chemistry Techniques
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Investigation Of Asphalt Pavement Mixture Blending Utilizing Analytical Chemistry Techniques
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Author : Benjamin F. Bowers
language : en
Publisher:
Release Date : 2013
Investigation Of Asphalt Pavement Mixture Blending Utilizing Analytical Chemistry Techniques written by Benjamin F. Bowers and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with Binders (Materials) categories.
The use of Reclaimed Asphalt Pavement (RAP) in new pavement mixtures is a topic of interest throughout the transportation industry and academia due its economic and environmental implications. There is concern however about how well the binder from the RAP blends with new, virgin binder when the mixture is created. Insufficient blending of the aged and unaged binders may compromise the long-term pavement performance. In this study, an enhanced staged extraction method is coupled with two chemical testing techniques to develop a novel approach for evaluating blending efficiency from a qualitative and quantitative perspective: Gel Permeation Chromatography (GPC) and Fourier Transform Infrared Spectroscopy (FTIR). Both chemical testing techniques can be used to study asphalt binder aging. The staged extraction method consists of washing an asphalt mixture with solvent to remove layers of asphalt binder from the binder film. The study presented in Chapter 2 uses FTIR and fractionation to investigate whether sequential dissolution of the binder fractions occurs rather than a true removal of layers. Sequential dissolution is found to occur with some common asphalt solvents that were tested, and trichloroethylene (TCE) is determined to be the best solvent for staged extraction. In Chapter 3 an approach using GPC and FTIR is used to analyze binder recovered by staged extraction to evaluate the blending efficiency of RAP and virgin binder. Partial blending of the binder is found to occur throughout the binder film. Chapter 4 explores the impact of mixing time, mixing temperature, and the addition of Warm Mix Asphalt (WMA) additives on blending efficiency using rheological testing and GPC. All mixing factors were found to impact the asphalt mixture. Blending efficiency, estimated with a blending ratio, was less than 80% in all cases. The staged extraction method is employed with FTIR in Chapter 6 to determine the most efficient way to create a laboratory-aged artificial RAP for controlled experiments. In Chapter 7 GPC was used to develop a new method of determining whether fine aggregate used in pavement mixtures is contaminated with asphalt binder, which could potentially blend with the virgin binder and compromise the pavement performance.
Asphalt Paving Technology 2015
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Author : Eugene Skok
language : en
Publisher: DEStech Publications, Inc
Release Date : 2016-02-16
Asphalt Paving Technology 2015 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 2016-02-16 with Technology & Engineering categories.
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.
Functional Pavement Design
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Author : Sandra Erkens
language : en
Publisher: CRC Press
Release Date : 2016-10-14
Functional Pavement Design written by Sandra Erkens and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-10-14 with Technology & Engineering categories.
Functional Pavement Design is a collections of 186 papers from 27 different countries, which were presented at the 4th Chinese-European Workshops (CEW) on Functional Pavement Design (Delft, the Netherlands, 29 June-1 July 2016). The focus of the CEW series is on field tests, laboratory test methods and advanced analysis techniques, and cover analysis, material development and production, experimental characterization, design and construction of pavements. The main areas covered by the book include: - Flexible pavements - Pavement and bitumen - Pavement performance and LCCA - Pavement structures - Pavements and environment - Pavements and innovation - Rigid pavements - Safety - Traffic engineering Functional Pavement Design is for contributing to the establishment of a new generation of pavement design methodologies in which rational mechanics principles, advanced constitutive models and advanced material characterization techniques shall constitute the backbone of the design process. The book will be much of interest to professionals and academics in pavement engineering and related disciplines.
Numerical And Experimental Investigation Of Production And Blending Mechanisms Of Asphalt Mixtures With Reclaimed Asphalt Pavement
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Author : Kun Zhang
language : en
Publisher:
Release Date : 2016
Numerical And Experimental Investigation Of Production And Blending Mechanisms Of Asphalt Mixtures With Reclaimed Asphalt Pavement written by Kun Zhang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
This study investigated the production and blending mechanisms for asphalt mixtures that contain reclaimed asphalt pavement (RAP). The numerical and experimental methods used in this study can be used to assist asphalt plant design and operations to produce high quality RAP mixtures.
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.
Investigation Of Hot Mix Asphalt Mixtures At Mn Road
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Author : Mary Stroup-Gardiner
language : en
Publisher:
Release Date : 1997
Investigation Of Hot Mix Asphalt Mixtures At Mn Road 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 1997 with Pavements, Asphalt categories.
This report presents the material characterization for the Minnesota Road Research Project (Mn/ROAD) bituminous materials. This effort will provide the historical base line information on properties needed for the validation of future pavement evaluation and design models. The objectives of the work were to 1) Document construction of Mn/ROAD, 2) Establish a series of test methods for characterizing the materials and 3) Develop a data base of material properties to develop mechanistic pavement design procedures. Documentation on construction included mixture design, construction techniques and a summary of test results. The laboratory test methods represent a wide variety of tests developed by the Strategic Highway Research Program, the National Cooperative Highway Research Program and the Federal Highway Administration. The materials represent those tested during the mixture design, construction and post construction phases of Mn/ROAD.
Designing Stone Matrix Asphalt Mixtures For Rut Resistant Pavements
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Author : E. Ray Brown
language : en
Publisher: Transportation Research Board
Release Date : 1999
Designing Stone Matrix Asphalt Mixtures For Rut Resistant Pavements written by E. Ray Brown 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 1999 with Asphalt categories.
Part 1: Summary of research results; Part 2: Mixture design method, construction guidelines, and quality control/quality assurance procedures
Investigation Of The Design And Control Of Asphalt Paving Mixtures
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Author : United States. Mississippi River Commission
language : en
Publisher:
Release Date : 1948
Investigation Of The Design And Control Of Asphalt Paving Mixtures written by United States. Mississippi River Commission and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1948 with Asphalt categories.
Investigation Of Fire And Explosion Accidents In The Chemical Mining And Fuel Related Industries
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Author : Bernard J. Scheiner
language : en
Publisher:
Release Date : 1985
Investigation Of Fire And Explosion Accidents In The Chemical Mining And Fuel Related Industries written by Bernard J. Scheiner and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Automobiles categories.
Interaction Between New And Age Hardened Binders In Asphalt Mixes Containing High Quantities Of Reclaimed Asphalt Pavement And Reclaimed Asphalt Shingles
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Author : Yuan He
language : en
Publisher:
Release Date : 2016
Interaction Between New And Age Hardened Binders In Asphalt Mixes Containing High Quantities Of Reclaimed Asphalt Pavement And Reclaimed Asphalt Shingles written by Yuan He and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
As virgin pavement material sources become scarcer and costlier the use of higher quantities of reclaimed asphalt pavement (RAP) and reclaimed asphalt shingles (RAS) in the production of new asphalt mixes becomes increasingly desirable. RAP/RAS binder in the mix has different levels of aging. Through oxidation, the binder becomes stiffer and more rigid than virgin binder, and thus results in a pavement material that is more brittle and susceptible to fatigue and thermal cracking. The purpose of this dissertation study was to investigate the interactions between new and age binders and evaluate asphalt mixes performance. A major concern associated with the use of high percentages of RAP and/or RAS is the level of blending between virgin and age-hardened binders, because the performance of the mix can be highly influenced by the properties of the composite binder. The blending between new binder and age-hardened RAP binder can be explained through diffusion mechanisms. This research used asphalt binder testing and diffusion and aging theory to investigate the evolution of blending between virgin and RAP binders during asphalt mix production, storage, and placement. The rheological properties of a two-layer asphalt binder sample composed of virgin and simulated RAP binder were measured using a dynamic shear rheometer (DSR) after conditioning following hot mix asphalt (HMA) and warm mix asphalt (WMA) time-temperature paths during mixing and placement. The diffusion and aging coefficients for the composite binder were estimated by comparing measured shear stiffness values with those predicted using a diffusion model and considering asphalt binder aging over time. The diffusion model is solved numerically based on the finite control volume approach. Results show that the HMA results in nearly full blending of the new and aged binders following the time-temperature paths used in this study; while the WMA results in only partial blending. Traditionally, the properties of blended binders in asphalt mixes containing RAP and RAS are evaluated through rheological testing of the binder extracted and recovered from a mix. However, this approach has long been criticized for being labor intensive, for potentially altering the chemistry of the binder and consequently changing the binder rheology, for forcing blending of binders that may not have been present in the mix, and for creating hazardous material disposal issues. The research presented in this dissertation proposes an alternative approach for characterizing blended binders by testing the linear viscoelastic properties of a fine aggregate matrix (FAM) asphalt mix using a torsion bar fixture in a DSR. A procedure has been developed for preparation and testing of small FAM cylindrical FAM specimens. The results demonstrated that this testing is sensitive to FAM mixes made of different virgin binders, RAP/RAS contents, with and without rejuvenating agent. More importantly, FAM mix testing shows similar results as that from DSR binder testing and full mix testing in terms of rankings of master curves and Black diagrams. Statistical analysis (ANOVA) on stiffness values from FAM testing also provides the same conclusion to that at binder and mix levels. Therefore, FAM approach has the potential to be used as a substitute to stiffness testing for mix comparison purposes. It is also a less expensive and more efficient testing approach than the full mix testing.The combined effect of RAP, RAS, and different virgin binder sources and grades on performance of the blended binders and asphalt mixes was also investigated. Previous studies have indicated that RAP, RAS, and virgin binder grades each has certain effects on performance of the mix. The addition of RAP/RAS undermines fatigue and thermal performance and improves rutting resistance. The virgin binder grade should be carefully chosen based on the percentages of RAP/RAS in the mix. Results from unconfined RLT appears to show that reducing the binder grade when using more than 25 percent RAP results in rutting performance similar to the original grade. Therefore, it is likely safe for high temperatures if the binder grade is reduced to meet the low and intermediate temperature requirements. Asphalt binders contain different organic molecules, and thus their chemical compositions vary according to the source of the oil used in their production. Virgin binders from different sources blend differently with the age-harden oxidized binder in RAP/RAS. Therefore, depending on the level of blending between virgin and oxidized binders, the performance of the mixes could vary substantially. Findings from this work indicated that virgin binder source had some effect on the blended materials. Additional research that came from the testing approaches to complete the investigation of RAP/RAS with this dissertation were also investigated. All the asphalt mixes used in this study were designed following Caltrans modified Superpave mix design procedure and tested using an Asphalt Mixture Performance Tester (AMPT). The effects of specimen preparation variables in terms of compaction method, compaction level, test temperature, stress state, and deformation measurement location when using the AMPT to predict mix stiffness and permanent deformation were evaluated. The best approach using Superpave testing equipment that appears to best characterize expected rutting performance as defined by previous calibrated RSCH results were also investigated.