Influence Of Rheological Properties Of Modified Asphalt Binders On The Load Deformation Characteristics Of The Binder Aggregate Mixtures

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Influence Of Rheological Properties Of Modified Asphalt Binders On The Load Deformation Characteristics Of The Binder Aggregate Mixtures

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Author : Akhtarhusein Asgarali Tayebali
language : en
Publisher:
Release Date : 1990

Influence Of Rheological Properties Of Modified Asphalt Binders On The Load Deformation Characteristics Of The Binder Aggregate Mixtures written by Akhtarhusein Asgarali Tayebali and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Asphalt categories.

Influence Of The Rheological Properties Of Modified Asphalt Binders On The Load Deformation Characteristics Of The Binder Aggregate Mixtures

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Author : AA. Tayebali
language : en
Publisher:
Release Date : 1992

Influence Of The Rheological Properties Of Modified Asphalt Binders On The Load Deformation Characteristics Of The Binder Aggregate Mixtures written by AA. Tayebali and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Dynamic modulus categories.

While fatigue distress is still of major concern relative to the performance of asphalt pavements, permanent deformation in the form of rutting is assuming more significance for heavy duty highway pavements because of increased number of repetitions of heavy axle loads and increased tire pressures resulting from the use of radial tires (as compared to bias ply tires). In recent years, asphalt modifiers have found increasing use in mitigating excessive permanent deformation in the asphalt concrete pavements. However, questions arise as to what methodology should be used in comparing modifiers and in selecting the amount of modifier which should be used for a particular application.

Polymer Modified Asphalt Binders

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Author : Kenneth R. Wardlaw
language : en
Publisher: ASTM International
Release Date : 1992

Polymer Modified Asphalt Binders written by Kenneth R. Wardlaw and has been published by ASTM International this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Asphalt categories.

"ASTM Publication Code Number (PCN) 04-011080-08. - "Sponsored by ASTM Committee D-4 on Road and Paving Materials."-- Foreword. - Includes bibliographical references and indexes. - Electronic reproduction; W. Conshohocken, Pa; ASTM International; 2011; Mode of access: World Wide Web; System requirements: Web browser; Access may be restricted to users at subscribing institutions.

Rheological And Rutting Characterization Of Asphalt Mixes With Modified Binders

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Author : S. Anjan kumar
language : en
Publisher:
Release Date : 2012

Rheological And Rutting Characterization Of Asphalt Mixes With Modified Binders written by S. Anjan kumar and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Aging categories.

This paper presents the results of investigations on the rheological properties of modified asphalt binders and their influence on the performance of asphalt mixes. Asphalt mixes with modified binders such as styrene butadiene styrene polymer, crumb rubber, natural rubber, and waste plastics were evaluated for their rheological properties and compared to the properties of asphalt mixes with unmodified VG30 (viscosity grade) asphalt binder. The dynamic modulus values and rutting characteristics of the asphalt mixes were studied with due consideration to different levels of aging and temperature variations. Studies on the rheological properties showed that the energy dissipated by unmodified asphalt (VG30) binder is higher than that of modified asphalt binders. Long-term aged natural rubber and waste plastic modified asphalt binders showed significant increase in the properties compared to unmodified asphalt binder (VG30). Reduced temperature susceptibility of polymer modified asphalt binder showed that only polymer modification can enhance both high temperature rutting resistance and low temperature thermal cracking resistance of asphalt mixes. The transient nature of polymer modified asphalt mix from viscoelastic solid-like to viscoelastic fluid-like condition is significantly shifted to higher temperature compared to that of the mix with unmodified asphalt binder. Aging and rutting indices showed that rubber modified asphalt mixes are highly susceptible to aging. Statistical analysis of test results showed that the process of modification of asphalt binder, aging, and temperature during the test influence the rheological and rutting characteristics of asphalt mixes significantly. Correlation between the asphalt binder properties and its influence on the rutting resistance are found to be statistically significant. The analysis using least significant difference showed that polymer modified asphalt binder significantly improves the aging and rutting resistance of asphalt mixes compared to unmodified asphalt binder.

Effect Of Polymer Modification On The Properties Of Asphalt Concrete

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Author : Alekh S. Bhurke
language : en
Publisher:
Release Date : 1999

Effect Of Polymer Modification On The Properties Of Asphalt Concrete written by Alekh S. Bhurke 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 concrete categories.

Modified Asphalt

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Author : Jose Luis Rivera Armenta
language : en
Publisher: BoD – Books on Demand
Release Date : 2018-09-19

Modified Asphalt written by Jose Luis Rivera Armenta and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-09-19 with Technology & Engineering categories.

Asphalt modification is an important area in the development of new road and pavement materials. There is an urgent demand for road materials that can minimize fracture at low temperatures and increase resistance to deformation at high temperatures. The function of asphalt is to bind aggregate to protect it from water and other harmful agents. In the beginning asphalt was ideal for this purpose, but recently traffic loads have increased and environmental factors have deteriorated more rapidly than before. Asphalt is a byproduct of crude oil in the refining process, and it is considered a complex heterogeneous mixture of hydrocarbons. Asphalt modification has become an important research area, using several methods and new materials as modifiers.

Characterizing The Asphalt Aggregate Mixtures Using Rheological Properties Of Asphalt Binders

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Author : M. Zeng
language : en
Publisher:
Release Date : 2006

Characterizing The Asphalt Aggregate Mixtures Using Rheological Properties Of Asphalt Binders written by M. Zeng and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Asphalt binder categories.

Modeling techniques were employed to establish the relationship between the rheological properties (G* and ?) of asphalt binders and asphalt-aggregate mixtures. Results of this study indicate that the complex modulus and phase angle of the mixture can be represented by the same parameters obtained from the binder under the conditions of material linearity. This relationship is independent of frequency (or loading time) and temperature. For typical dense graded asphalt mixtures, the relationship is not significantly affected by the characteristics of both the asphalt binder and the aggregate. The relationship between the complex moduli of the asphalt binder and mixture can be mathematically modeled by the generalized power function. This function is more precise than the Heukelom and Klomp model (HK expression) and bilogarithm linear model (BL approximation), particularly at low and high modulus values. The generalized power function can differentiate asphalt binder as a viscoelastic liquid and asphalt mixture as a viscoelastic solid under the action of shear loading. The relationship of the phase angles, as an integrated part of rheological property of a viscoelastic material, between asphalt binders and mixtures can be modeled by a modified haversine function. This function completes the modeling of rheological properties as a whole for the first time and also reflects the fundamental material difference between the binder and the mixture in viscoelastic theory. Characterizing the asphalt mixture properties through the binder properties not only can save tremendous efforts in testing an asphalt mixture, but also can simplify the pavement performance prediction.

Viscoelastic And Permanent Deformation Characteristics Of Asphalt Aggregate Mixes Tested As Hollow Cylinders And Subjected To Dynamic Axiel And Shear Loads

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Author : Sirous Heydari Alavi
language : en
Publisher:
Release Date : 1992

Viscoelastic And Permanent Deformation Characteristics Of Asphalt Aggregate Mixes Tested As Hollow Cylinders And Subjected To Dynamic Axiel And Shear Loads written by Sirous Heydari Alavi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with categories.

Tensile Strength Of Asphalt Binder And Influence Of Chemical Composition On Binder Rheology And Strength

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Author : Sultana Sharmin
language : en
Publisher:
Release Date : 2014

Tensile Strength Of Asphalt Binder And Influence Of Chemical Composition On Binder Rheology And Strength written by Sultana Sharmin 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.

Asphalt mixtures or asphalt concrete are used to pave about 93% of about 2.6 million miles paved roads and highways in the US. Asphalt concrete is a composite of aggregates and asphalt binder; asphalt binder works as a glue to bind the aggregate particles. The mechanical response of the asphalt binder is dependent on the time/rate of loading, temperature and age. An asphalt concrete mixture inherits most of these characteristics from the asphalt binder. Also the asphalt binder plays a critical role in providing the asphalt concrete the ability to resist tensile stresses and relaxing thermally induced stresses that can lead to fatigue and low temperature cracking, respectively. Hence, it is very important (but not sufficient) to ensure that asphalt binders used in the production of asphalt concrete are inherently resistant to cracking, rutting and other distresses that a pavement may undergo. Current binder specification (AASHTO M-320) to evaluate its fatigue cracking is based on the stiffness of the binder and not on its tensile strength. Also, measurements following current specifications are made on test specimens subjected to a uniaxial mode of loading that does not produce the same stress state in the binder as in the case of asphalt concrete. Another challenge in being able to produce binders with inherently superior performing characteristics is the fact that the asphalt binders produced in a refinery do not have a consistent chemical composition. The chemical composition of asphalt binder depends on the source and refining process of crude oil. There is a need to better quantify the tensile strength of asphalt binder and understand the relationship between the chemical composition of asphalt binders and its mechanical properties. The knowledge from this study can be used to engineer asphalt binders that have superior performance characteristics. The objective of this research was to quantify the tensile strength of asphalt binder, develop a metric for the tensile strength and identify the relationship between chemical composition and mechanical properties of asphalt binder. Laboratory tests were performed on binders of different grades using a poker chip geometry to simulate confined state by varying the film thickness, rate of loading and modes of loading. The chemical properties of asphalt binder were studied based on SARA fractionation. The findings from this research showed that the modified correspondence principles can unify and explain the rate and mode dependency of asphalt binder. This study also quantified the relationship between chemical composition, and rheological and mechanical properties of asphalt binder. Finally, a composite model was developed based on the individual properties of chemical fractions which could predict the dynamic modulus of the asphaltenes doped and resins doped binder.

Physical Properties Of Asphalt Cement Binders

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Author : John C. Hardin
language : en
Publisher: ASTM International
Release Date : 1995

Physical Properties Of Asphalt Cement Binders written by John C. Hardin and has been published by ASTM International this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Asphalt cement categories.

A dozen papers from a December 1993 symposium in Dallas/Fort Worth, Texas. Among the topics are why the new proposed rheological properties of asphalt binders are required and how they compare to conventional properties, the development and use of the SHRP direct tension specification test, oxidatio