Fatigue Characterization Of Asphalt Mixes With Polymer Modified Asphalt Cement
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Fatigue Characterization Of Asphalt Mixes With Polymer Modified Asphalt Cement
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Author : Ali Qabur
language : en
Publisher:
Release Date : 2018
Fatigue Characterization Of Asphalt Mixes With Polymer Modified Asphalt Cement written by Ali Qabur 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 cement categories.
Asphalt pavement cracking is the most prevalent distress in pavements. In flexible pavements, fatigue cracking is a major cause of deterioration and can significantly reduce the service life of pavements [1]. Fatigue cracking is caused by traffic loading and can be accelerated by aging of the asphalt, freeze-thaw cycles, and poorly designed asphalt concrete mixture. Fatigue resistance of asphalt mixes could be improved by adding Polymer Modified Asphalt Cement (PMAC) [2]. In particular, the use of Styrene-Butadiene-Styrene (SBS) was found to be an efficient way to increase the fatigue life of mixes [3]. However, the primary issue is the lack of consistent performance testing methods to determine fatigue performance. In addition, the relationship between the PMAC properties and mixture performance is not fully understood. This thesis will focus on the evaluation of asphalt mixes with PMAC using the 4 point-bending beam (4PB) test to determine the fatigue performance of asphalt mixtures. The classical fatigue “WÖHLER'' curve and “DGCB” damage rate method, which was developed at Département Génie Civil et Bâtiment in Lyon, have been used to evaluate and characterize the fatigue of the asphalt mixes in this study. In general, it was found that the fatigue life (Nf50%) was improved when Polymer Modified Asphalt Cement was used, and the polymer content increased. Both fatigue analysis methods, by WÖHLER curve and the DGCB method, showed that the addition of SBS polymer improved the fatigue life and reduced the damage from fatigue loading. Finally, some recommendations were made with regards to fatigue testing.
Engineering Characteristics Of Polymer Modified Asphalt Mixtures
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Author : Mohammad Jamal Khattak
language : en
Publisher:
Release Date : 1999
Engineering Characteristics Of Polymer Modified Asphalt Mixtures written by Mohammad Jamal Khattak and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Asphalt categories.
Fatigue Life Characterization Of Superpave Mixtures At The Virginia Smart Road
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Author : Imad L. Al-Qadi
language : en
Publisher:
Release Date : 2005
Fatigue Life Characterization Of Superpave Mixtures At The Virginia Smart Road 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 2005 with Pavements, Asphalt categories.
Laboratory fatigue testing was performed on six Superpave HMA mixtures in use at the Virginia Smart Road. Evaluation of the applied strain and resulting fatigue life was performed to fit regressions to predict the fatigue performance of each mixture. Differences in fatigue performance due to field and laboratory production and compaction methods were investigated. Also, in-situ mixtures were compared to mixtures produced accurately from the job mix formula to determine if changes occurring between the laboratory and batch plant significantly affected fatigue life. Results from the fatigue evaluation allowed verification of several hypotheses related to mixture production and compaction and fatigue performance. It was determined that location within the pavement surface, such as inner or outer wheelpath or center-of-lane, did not significantly affect laboratory fatigue test results, although the location will have significant effects on in-situ fatigue life. Also the orientation of samples cut from an in-situ pavement (parallel or perpendicular to the direction of traffic) had only a minor effect on the laboratory fatigue life, because the variability inherent in the pavement due to material variability is greater than the variability induced by compaction. Fatigue life of laboratory-compacted samples was found to be greater than fatigue life of field-compacted samples; additionally, the variability of the laboratory compacted mixture was found to be less than that of the field-compacted samples. However, it was also found that batch-plant production significantly reduces specimen variability as compared to small-batch laboratory production when the same laboratory compaction is used on both specimen sets. Finally, for Smart Road mixtures produced according to the job mix formula, the use of polymer-modified binder or stone matrix asphalt was shown to increase the expected fatigue life. However, results for all mixes indicated that fatigue resistance rankings might change depending on the applied strain level. This study contributes to the understanding of the factors involved in fatigue performance of asphalt mixtures. Considering that approximately 95% of Virginia's interstate and primary roadways incorporate asphalt surface mixtures, and that fatigue is a leading cause of deterioration, gains in the understanding of fatigue processes and prevention have great potential payoff by improving both the mixture and pavement design practices.
Fatigue Analysis Of Asphalt Concrete Under Indirect Tensile Mode Of Loading Using Crack Images
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Author : Manh Tuan Nguyen
language : en
Publisher:
Release Date : 2012
Fatigue Analysis Of Asphalt Concrete Under Indirect Tensile Mode Of Loading Using Crack Images written by Manh Tuan Nguyen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Crack image categories.
In this study, various fatigue criteria for indirect tensile (IDT) fatigue tests were evaluated and a new approach to identify the fatigue failure was proposed based on a crack-length criterion. The IDT fatigue tests were conducted to characterize the fatigue behavior of various asphalt mixtures, such as three warm mix asphalt mixtures and a polymer-modified asphalt mixture. During the IDT tests, digital cameras were mounted to monitor crack growth on the both faces of a specimen. Existing three fatigue failure criteria were evaluated regarding to fatigue-crack development. Then, a crack-length limit was proposed as a fatigue criterion. The IDT strength tests were also conducted to determine fracture energy of the mixtures. Based on the new fatigue criterion, a fatigue performance model was constituted with dissipated and fracture energy parameters. The fatigue model proposed in this study successfully predicted the fatigue lives of the mixtures with a high level of accuracy. The main advantage of this fatigue model is that it does not need a transfer function to convert the fatigue life to crack length or area, because fatigue-crack length is directly determined from the crack-length limit.
Fatigue And Dynamics Testing Of Bituminous Mixtures
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Author :
language : en
Publisher: ASTM International
Release Date : 1974
Fatigue And Dynamics Testing Of Bituminous Mixtures written by and has been published by ASTM International this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with categories.
Durability And Performance Characteristics Of Hot Mix Asphalt Containing Polymer Additives
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Author : Robert Y. Liang
language : en
Publisher:
Release Date : 2001
Durability And Performance Characteristics Of Hot Mix Asphalt Containing Polymer Additives written by Robert Y. Liang 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 concrete categories.
Ohio Department of Transportation has adopted the hot mix asphalt concrete containing polymer modifiers for use in the interstate highway pavement. Among the various reasons cited for the adoption of polymer modifiers are the favorable field experiences by ODOT, extensive literatures reporting enhanced performance, such as rutting resistance, low temperature thermal cracking resistance, and possibly fatigue endurance. However, despite these favorable findings, there are still cases involving premature failure of hot mixtures containing polymer modifiers. Concerns regarding optimum polymer content, compatibility between polymer additives and asphalt cement, proper mixing and compaction procedure remain to be resolved. Furthermore, performance based specifications to ensure production of desirable final asphalt concrete product require additional development. Questions regarding the suitability of Superpave binder testing procedures for the polymer-modified binders need to be clarified.
Mechanical Tests For Bituminous Mixes Characterization Design And Quality Control
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Author : E. Eustacchio
language : en
Publisher: CRC Press
Release Date : 1990-09-20
Mechanical Tests For Bituminous Mixes Characterization Design And Quality Control written by E. Eustacchio and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990-09-20 with Architecture categories.
This book forms the Proceedings of an International RILEM Symposium, the fourth in the series, on Testing of Bituminous Mixes in Budapest, Hungary, October 1990. The aim of the Symposium is to promote tests for the characterization, design and quality control of bituminous mixes which combine the best features of traditional and modern approaches.
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.
Influence Of Polymer Modified Binders On The Fatigue Behavior Of Asphalt Mixtures
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Author : Elie Nassif Abi-Jaoude
language : en
Publisher:
Release Date : 1991
Influence Of Polymer Modified Binders On The Fatigue Behavior Of Asphalt Mixtures written by Elie Nassif Abi-Jaoude and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with categories.
Polymer Fiber Modified Asphalt Fracture Mechanisms And Microstructure Relationships To Distresses And Environmental Factors
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Author : Edward Burton Scott
language : en
Publisher:
Release Date : 1993
Polymer Fiber Modified Asphalt Fracture Mechanisms And Microstructure Relationships To Distresses And Environmental Factors written by Edward Burton Scott and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Pavements, Asphalt concrete categories.