Understanding The Performance Of Modified Asphalt Binders In Mixtures

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Understanding the Performance of Modified Asphalt Binders in Mixtures

Author : Kevin D. Stuart
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (14 download)

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Book Synopsis Understanding the Performance of Modified Asphalt Binders in Mixtures by : Kevin D. Stuart

Download or read book Understanding the Performance of Modified Asphalt Binders in Mixtures written by Kevin D. Stuart and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of 11 asphalt binders on the moisture sensitivity of a mixture were measured using the Hamburg Wheel- Tracking Device (Hamburg WTD). The Hamburg WTD tests a slab of hot- mix asphalt submerged in hot water by rolling a steel wheel across its surface. The binders consisted of two unmodified asphalt binders, an air- blown asphalt binder, and eight polymer- modified asphalt binders. The continuous high- temperature performance grades (PG's) ranged from 67 to 77. Two aggregates were used: diabase and limestone. The mixture results using the limestone aggegate could not be used to evaluate the asphalt binders because the Hamburg WTD crushed the limestone aggregate. A test temperature of 58 degrees Celcius was chosen for the diabase mixtures based on trial tests using the air- blown and unmodified PG 70- 22 asphalt binders. It was expected that most of the mixtures with polymer- modified asphalt binders would have greater resistance to moisture damage than the mixture with the unmodified PG 70- 22 asphalt binder because they would provide increased adhesion to the aggregate or create a network within the asphalt that was more resistant to water penetration. However, only one polymer- modified asphalt binder provided a greater resistance at a 5- percent level of significance. Some of the asphalt binders provided significantly different resistances to moisture damage that were not related to differences in cohesive strength as measured by the asphalt binder parameter G*/sin(delta) at 58 degrees Celcius. It was concluded that polymer- modified asphalt binders having the same G*/sin(delta) can provide different adhesive strengths and/or different resistances to water penetration. Reasons for these differences need to be determined.

Understanding the Performance of Modified Asphalt Binders in Mixtures

Author : Kevin D. Stuart
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (14 download)

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Book Synopsis Understanding the Performance of Modified Asphalt Binders in Mixtures by : Kevin D. Stuart

Download or read book Understanding the Performance of Modified Asphalt Binders in Mixtures written by Kevin D. Stuart and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The overall objective of this study was to determine if the Superpave high-temperature rheological properties of polymer-modified asphalt binders correlate to asphalt mixture rutting resistance. An emphasis was placed on evaluating polymer-modified asphalt binders with identical (or close) high-temperature performance grades (PG's), but varied polymer chemistries. Eleven asphalt binders were obtained for this study: two unmodified asphalt binders, an air-blown asphalt binder, and eight polymer-modified asphalt binders. High-temperature asphalt binder properties were measured by a dynamic shear rheometer (DSR). Mixture rutting resistance was measured by repeated shear at constant height (RSCH), and the French Pavement Rutting Tester (French PRT). The first objective was to verify the findings of a previous study using a different aggregate. In the previous study, it was found that the Superpave high-temperature asphalt binder properties correlated to mixture rutting resistance with few outliers, and a change in high-temperature PG from 70 to 76 increased rutting resistance. However, the correlation between RSCH and asphalt binder G*/sind (delta) depended on DSR frequency. The data suggested that a low DSR frequency, such as 0.1 rad/s, might provide a better grading system than the standard DSR frequency of 10.0 rad/s. This would require a change in the current asphalt binder specification. A diabase aggregate was used in a previous study. The data using a second aggregate, a limestone aggregate, in combination with four of the asphalt binders, agreed with the findings from the diabase mixtures. The second objective was to retest the diabase mixtures at 70 degrees Celsius using RSCH. The test temperatures used in the previous study were 50 degrees Celsius for RSCH and 70 degrees Celsius for the French PRT. The polymer-modified asphalt binders had continuous high-temperature PG's ranging from 71 to 77. Therefore, it was recommended that the test temperature for RSCH be increased to 70 degrees Celsius. Again, the correlation between RSCH and G*/sind was dependent on DSR frequency. The data suggested that a low DSR frequency, such as 0.1 rad/s, might provide a better grading system. However, it is not known whether this finding applies to pavements, or is related to the accelerated nature of the RSCH test. Furthermore, G*/sind (delta) at 0.1 rad/s did not clearly provide a better correlation to RSCH than the high-temperature PG's of the asphalt binders. The degree of correlation between the French PRT and G*/sind at 70 degrees Celsius did not depend on DSR frequency, and there was only one outlier. A correlation between the French PRT and high-temperature PG provided no obvious outliers. No changes to the specification are recommended based on the French PRT results.

Nano-Modified Asphalt Binders and Mixtures to Enhance Pavement Performance

Author : Luís Picado Santos
Publisher :
ISBN 13 : 9783039367108
Total Pages : 198 pages
Book Rating : 4.3/5 (671 download)

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Book Synopsis Nano-Modified Asphalt Binders and Mixtures to Enhance Pavement Performance by : Luís Picado Santos

Download or read book Nano-Modified Asphalt Binders and Mixtures to Enhance Pavement Performance written by Luís Picado Santos and published by . This book was released on 2020-09-18 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is dedicated to the use of nanomaterials for the modification of asphalt binders, and to investigate whether or not the use of nanomaterials for asphalt mixtures fabrication achieves more effective asphalt pavement layers. A total of 10 contributions are included. Four are related to "Binder's modification" and five to "Asphalt mixtures' modification". The remaining contribution is a review of the effects of the modifications on nanomaterials, particularly nanosilica, nanoclays and nanoiron, on the performance of asphalt mixtures. The published group of papers fosters awareness about the use of nanomaterials to modify asphalt mixtures to obtain more performant and durable flexible road pavements.

Performance Characteristics of Asphalt Binders and Mixtures Modified by Waste Toner

Author : Mansour Solaimanian
Publisher :
ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.:/5 (385 download)

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Book Synopsis Performance Characteristics of Asphalt Binders and Mixtures Modified by Waste Toner by : Mansour Solaimanian

Download or read book Performance Characteristics of Asphalt Binders and Mixtures Modified by Waste Toner written by Mansour Solaimanian and published by . This book was released on 1998 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Investigation of the Performance of Neat and Modified Asphalt Binders

Author : Yalan Tang
Publisher :
ISBN 13 : 9781622601387
Total Pages : pages
Book Rating : 4.6/5 (13 download)

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Book Synopsis Investigation of the Performance of Neat and Modified Asphalt Binders by : Yalan Tang

Download or read book Investigation of the Performance of Neat and Modified Asphalt Binders written by Yalan Tang and published by . This book was released on 2006-10-15 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Asphalt Pavements

Author : Patrick Lavin
Publisher : CRC Press
ISBN 13 : 1482267713
Total Pages : 463 pages
Book Rating : 4.4/5 (822 download)

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Book Synopsis Asphalt Pavements by : Patrick Lavin

Download or read book Asphalt Pavements written by Patrick Lavin and published by CRC Press. This book was released on 2003-09-02 with total page 463 pages. Available in PDF, EPUB and Kindle. Book excerpt: Asphalt Pavements provides the know-how behind the design, production and maintenance of asphalt pavements and parking lots. Incorporating the latest technology, this book is the first to focus primarily on the design, production and maintenance of low-volume roads and parking areas.Special attention is given to determining the traffic capacity, re

Low Temperature Investigations on Asphalt Binder Performance -

Author : Oluranti Paul Togunde
Publisher :
ISBN 13 :
Total Pages : 230 pages
Book Rating : 4.:/5 (263 download)

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Book Synopsis Low Temperature Investigations on Asphalt Binder Performance - by : Oluranti Paul Togunde

Download or read book Low Temperature Investigations on Asphalt Binder Performance - written by Oluranti Paul Togunde and published by . This book was released on 2008 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis investigates and documents fundamental studies of highway materials (asphalt engineering properties) especially on different modified asphalt binders and mixtures in order to understand failure mechanisms at low temperature and superior performance of such asphalt binders with the aim of preventing premature cracking on Ontario highways. In addition, seven asphalt binders of different compositions were used as a template for study and this research work is tailored towards Superpave® performance-based specification testing with the aim of improving asphalt pavement performance under various conditions and consequently reducing premature cracking in order to achieve long lasting highways. Based on the actual applied pattern of Superpave® specification criteria, the mechanical responses of the binders are analyzed by extended bending beam rheometer (eBBR), tensile stress ductilometer (Petrotest DDA3®), compact tension test (Instron AsphaltPro®), double-edge-notched tension and single-edge-notched tension (MTS 810 universal testing machine) protocols. The objective of this study entails establishing and developing of a proper procedure for the testing of binders with the aim of ranking (grading) the performance after validation of laboratory and field experiments. Analysis of the results appears to show that the premature distress on the Highway 417 trial sections can be attributed to reversible aging tendency (wax crystallization) at low temperatures coupled with low fatigue resistance of the binders. The results suggest that different polymer modifications had significant influence on the performance of asphalt mix as demonstrated from the results obtained from essential and plastic work of fracture using double-edge-notch-tension test (DENT). Crack tip opening displacement (CTOD) parameter consistently show the performing grading of asphalt binder while compact tension test protocol provides plane strain fracture toughness (K1c) which could be used to rank binders with respect to fracture resistance at low temperature. Hence, CTOD is a promising parameter which can be used to establish performance ranking of the binders.

Polymer Modified Asphalt Binders

Author : Kenneth R. Wardlaw
Publisher : ASTM International
ISBN 13 : 0803114133
Total Pages : 368 pages
Book Rating : 4.8/5 (31 download)

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Book Synopsis Polymer Modified Asphalt Binders by : Kenneth R. Wardlaw

Download or read book Polymer Modified Asphalt Binders written by Kenneth R. Wardlaw and published by ASTM International. This book was released on 1992 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: "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.

Polymer Modified Asphalt Binders

Author : Kenneth R. Wardlaw
Publisher : ASTM International
ISBN 13 : 0803114133
Total Pages : 368 pages
Book Rating : 4.8/5 (31 download)

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Book Synopsis Polymer Modified Asphalt Binders by : Kenneth R. Wardlaw

Performance Evaluation of Asphalt Concrete Mixtures Containing Unmodified and Crumb Rubber Modified Asphalt Binders

Author : Gajanan Suresh Natu
Publisher :
ISBN 13 :
Total Pages : 338 pages
Book Rating : 4.:/5 (395 download)

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Book Synopsis Performance Evaluation of Asphalt Concrete Mixtures Containing Unmodified and Crumb Rubber Modified Asphalt Binders by : Gajanan Suresh Natu

Download or read book Performance Evaluation of Asphalt Concrete Mixtures Containing Unmodified and Crumb Rubber Modified Asphalt Binders written by Gajanan Suresh Natu and published by . This book was released on 1998 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Binder Characterization and Evaluation

Author : David A. Anderson
Publisher : Strategic Highway Research Program (Shrp)
ISBN 13 :
Total Pages : 504 pages
Book Rating : 4.E/5 ( download)

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Book Synopsis Binder Characterization and Evaluation by : David A. Anderson

Download or read book Binder Characterization and Evaluation written by David A. Anderson and published by Strategic Highway Research Program (Shrp). This book was released on 1994 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Performance Survey on Open-graded Friction Course Mixes

Author : Gerald Huber
Publisher : Transportation Research Board
ISBN 13 :
Total Pages : 52 pages
Book Rating : 4.3/5 (555 download)

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Book Synopsis Performance Survey on Open-graded Friction Course Mixes by : Gerald Huber

Download or read book Performance Survey on Open-graded Friction Course Mixes written by Gerald Huber and published by Transportation Research Board. This book was released on 2000 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: This synthesis will be of interest to pavement construction, maintenance, design, and materials engineers; pavement contractors; and others interested in the use of open-graded friction course (OGFC) mixes. It describes the current state of the practice on the use of OGFC mixes, including information regarding design, materials, construction, maintenance, and rehabilitation strategies. Alternative treatments to traditional OGFC are also identified and discussed. Information was collected by surveying U.S. and Canadian transportation agencies and by conducting a literature search to gather additional insight into North American and European practices. This TRB report describes the recent performance of North American OGFC mixes and European porous asphalt by identifying benefits and stress indicators. A new generation of OGFC mixes has evolved over the last 5 years with changes that have been reported to dramatically improve performance. This synthesis describes new materials and design methods being used, as well as the applicability of the new generation of open-graded mixtures to North American use.

Modified Asphalt

Author : Jose Luis Rivera Armenta
Publisher : BoD – Books on Demand
ISBN 13 : 1789237262
Total Pages : 142 pages
Book Rating : 4.7/5 (892 download)

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Book Synopsis Modified Asphalt by : Jose Luis Rivera Armenta

Download or read book Modified Asphalt written by Jose Luis Rivera Armenta and published by BoD – Books on Demand. This book was released on 2018-09-19 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Detection of Polymer Modifiers in Asphalt Binder

Author : Stacey D. Diefenderfer
Publisher :
ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.:/5 (1 download)

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Book Synopsis Detection of Polymer Modifiers in Asphalt Binder by : Stacey D. Diefenderfer

Download or read book Detection of Polymer Modifiers in Asphalt Binder written by Stacey D. Diefenderfer and published by . This book was released on 2006 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study addressed the evaluation of alternative test methods to identify the presence of polymer modifiers in performance-graded binders for the purpose of quality assurance. A method of identification is presented in AASHTO T302, Polymer Content of Polymer-Modified Emulsions and Asphalt Binders, that uses Fourier transform infrared (FTIR) spectroscopy to evaluate the constituent elements in binders or emulsions. With proper calibration, output from FTIR can be used to determine the presence and approximate content of polymers in an asphalt binder. AASHTO T301, Elastic Recovery Test of Bituminous Materials by Means of a Ductilometer, offers an alternative method to determine the presence of polymer by evaluating the elasticity of the binder. Samples of binder were collected from contractor tanks and tested in accordance with AASHTO T301 and AASHTO T302. The performance grade was verified in accordance with AASHTO M320. Test results were evaluated to identify calibration needs, test variability, and choice of preferred methodologies for adoption into the quality assurance program. Results of the study identified the use of either FTIR analysis or elastic recovery as a timesaving alternative to full-fledged performance grading in the initial investigation of concerns about the presence of polymer. Both methods identified binders containing varying polymer contents with no instances of false positive identification. However, based on the results of this study, neither method is suitable to determine binder grade. The investigator recommends that the elastic recovery and FTIR analysis be incorporated as quality assurance tests to verify the presence of polymer in mixtures that specify the use of polymer-modified asphalt binders. Following this, the frequency of quality assurance sampling of polymer modified binders should be increased to ensure that inferior material is not being used in premium mixtures. Further, AASHTO T301 should be adopted in place of Virginia Test Method 104 for use with unaged binders. Incorporating the use of elastic recovery testing and FTIR spectroscopy as alternatives to performance grading will benefit VDOT by allowing increased quality assurance testing of premium asphalt mixtures. This will result in minimizing VDOT's risk of acceptance of inferior material and maximizing the benefits of using premium materials. Typically, performance grading is performed once per month on one binder sample from each active grade of binder in a VDOT district. This is estimated to result in testing less than 5% of the binder lots used in any district during a typical month. Although neither elastic recovery testing nor FTIR spectroscopy was shown conclusively to determine binder grade, almost all PG 76-22 binders shipped into Virginia contain polymer modifiers. Thus, the detection of the polymer is a first level indicator for quality assurance. The potential cost of these tests is approximately $200 per test for elastic recovery and approximately $120 per test for FTIR spectroscopy. Overall, the increased testing is expected to result in improved pavement quality by reducing the acceptance of inferior material.

The Behaviour of Nanoclay Modified Asphalt Binders and Mixtures

Author : Liniker Lettiere Ferreira Monteiro
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (134 download)

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Book Synopsis The Behaviour of Nanoclay Modified Asphalt Binders and Mixtures by : Liniker Lettiere Ferreira Monteiro

Download or read book The Behaviour of Nanoclay Modified Asphalt Binders and Mixtures written by Liniker Lettiere Ferreira Monteiro and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Asphalt pavement is subject to stresses induced by heavy traffic loading and thermal variations during its service life. Nowadays, increasing the permissible axle loads along with the impact of climate change have caused premature failure in the flexible pavement. Enhancing the properties of asphalt binders can reduce these distresses. Among the available options, finding a cost-effective alternative for improving the used binders is a challenge to overcome. Asphalt binder modification using nano-size materials has attracted attentions in recent years. Based on this study, nanoclays can improve the properties of asphalt binders, increase the resistance of asphalt to ageing, cracking and rutting, and extend the pavement's service life cycle. The objectives of this work were to investigate the rheological and mechanical properties of nanoclay modified asphalt binders and mixtures. The behaviour of a PG 64-28 asphalt binder modified with 2% and 4% concentration of two organo-montmorillonites was studied. Furthermore, the impact of using nanoclays was investigated in asphalt mixtures' performance. The nanoclays were mixed with the asphalt using a high shear mixer, and their dispersions were analyzed by employing a Scanning Electron Microscope (SEM) device. A SARA test was conducted on the modified and unmodified binders to examine the fraction composition of saturates, asphaltenes, resins and aromatics before and after the addition of nanoclays. Also, the neat binder and the nanoclay modified binders were subjected to short-term ageing using a rolling thin-film oven (RTFO) and long-term aged using a pressure ageing vessel (PAV). The following rheological properties of the asphalt binders were investigated: (1) High-temperature performance grading of unaged samples using a dynamic shear rheometer (DSR), (2) High-temperature performance grading of RTFO-aged samples using a DSR, (3) Intermediate temperature grading of PAV-aged samples using a DSR, (5) Low-temperature performance grading using a bending beam rheometer (BBR), (4) Two-piece healing test using a DSR, (6) Frequency-Sweep tests using a DSR, (7) Mixing and Compaction temperatures using a rotational viscometer, and (8) Mixing and compaction temperatures of modified asphalt binders using a DSR. Additionally, the mechanical properties of the asphalt mixtures that were analyzed are as follows: (1) Flow and Stability and stability test, (2) Bulk specific gravity test, (3) Theoretical maximum specific gravity on loose mixtures, (4) Fatigue and healing behaviour using a four-point bending test and (5) Dynamic Modulus test on Superpave samples. The results obtained from the high-temperature grading showed that the addition of 4% organo-montmorillonites increases the high-temperature grade from 64 to 70. Also, no change was observed in the low-temperature performance of the modified samples. The two-piece healing test showed promising results for nano-modified samples, with significant improvements in the initial healing proportional to the concentration of nanoclays in the binder. The Frequency-sweep analysis, utilizing a master curve, showed an improvement in ageing resistance by adding Montmorillonites. Furthermore, the SARA test results indicated that the nanoclay modified mixtures were storage stable. The asphalt mixture samples demonstrated, by repeated flexural bending using a four-point bending apparatus, increased stiffness and life cycles of the organo-montmorillonite modified asphalt mixtures.

Binder Characterization and Evaluation: Test methods

Author :
Publisher :
ISBN 13 :
Total Pages : 220 pages
Book Rating : 4.E/5 ( download)

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Book Synopsis Binder Characterization and Evaluation: Test methods by :

Download or read book Binder Characterization and Evaluation: Test methods written by and published by . This book was released on 1994 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Performance Evaluation of Modified Asphalt Binders

Author :
Publisher :
ISBN 13 :
Total Pages : 20 pages
Book Rating : 4.:/5 (614 download)

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Book Synopsis Performance Evaluation of Modified Asphalt Binders by :

Download or read book Performance Evaluation of Modified Asphalt Binders written by and published by . This book was released on 2002 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: In their quest to improve overall pavement performance and durability, pavement engineers in recent years developed and used innovative asphalt mixtures utilising engineered or modified asphalt binders. The technology of asphalt modification using refining processes has evolved in the past decade as a viable, effective alternative. Results of an extensive evaluation of several paving asphalt binders modified by refining processes are presented and discussed. The evaluation used testing and characterisation systems developed in the Strategic Highway Research Program (SHRP) and recent revisions of these systems as proposed in the NCHRP 9-10 project. Rheological, failure and ageing properties at temperatures that simulate pavement service were measured and analysed. Handling, constructability and performance characteristics of asphalt binders modified by refining processes are evaluated and compared with those of conventional materials and asphalt modified by different types of polymers. Comparative performance results on asphalt mixtures are presented to show the effect of the improvements in binder characteristics on mixture performance. Results on new binder test methods developed as part of NCHRP 9-10 are also presented comparing binder and mixture performance characteristics. For the covering abstract of this conference see ITRD number E211271.