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Material Charaterization And Performance Properties Of Superpave Mixtures
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Book Synopsis Material Characterization and Performance Properties of Superpave Mixtures by : Akhtarhusein Asgarali Tayebali
Download or read book Material Characterization and Performance Properties of Superpave Mixtures written by Akhtarhusein Asgarali Tayebali and published by . This book was released on 2004 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Material Charaterization and Performance Properties of Superpave Mixtures by :
Download or read book Material Charaterization and Performance Properties of Superpave Mixtures written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary objectives of this research study was to characterize properties of two NCDOT Superpave mixes with regards to fatigue distress, and to develop phenomenological fatigue relationships for these mixes based on various levels of strain, asphalt content, air void content, and temperatures. Of particular importance was the sensitivity of the Superpave mixes to asphalt content and air void content that are usually expected in-situ. Fatigue characterization of typical pavement sections using NCDOT fatigue models and using mechanistic analysis procedure suggests that the pavement fatigue life is sensitive to the mix variables and test temperatures considered in this study. A decrease in asphalt content by 0.5-percent (by wt. of mix) results in decrease of 18 to 25-percent fatigue life. An increase in 2% air void content will reduce pavement life by about 40% for 12.5-mm mixes, and by almost 60% for 19-mm mixes. An increase in temperature was found to result in decrease in fatigue life of pavement section under consideration, although, fatigue testing was conducted in controlled-strain mode-of-loading. A 5 & deg;C increase in temperature results in about 25-percent reduction in pavement life. Based on the overall result of the analysis, it appears that 19-mm mix is more sensitive to mix and test variables as compared to the 12.5-mm mix. The study of frequency effect on fatigue life of typical pavement section suggests that prediction of fatigue life of pavement section is independent of load frequency used in fatigue test as long as tensile strain is computed based on the same load frequency.
Book Synopsis Aggregate Properties and the Performance of Superpave-designed Hot Mix Asphalt by : Brian D. Prowell
Download or read book Aggregate Properties and the Performance of Superpave-designed Hot Mix Asphalt written by Brian D. Prowell and published by Transportation Research Board. This book was released on 2005 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fatigue Life Characterization of Superpave Mixtures at the Virginia Smart Road by : Imad L. Al-Qadi
Download or read book Fatigue Life Characterization of Superpave Mixtures at the Virginia Smart Road written by Imad L. Al-Qadi and published by . This book was released on 2005 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Superpave Mix Design by : Asphalt Institute
Download or read book Superpave Mix Design written by Asphalt Institute and published by . This book was released on 2001-01-01 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Simple Performance Tests by : Matthew W. Witczak
Download or read book Simple Performance Tests written by Matthew W. Witczak and published by Transportation Research Board. This book was released on 2005 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Research sponsored by the American Association of State Highway and Transportation Officials in cooperation with the Federal Highway Administration."
Book Synopsis Properties of Flexible Pavement Materials by :
Download or read book Properties of Flexible Pavement Materials written by and published by ASTM International. This book was released on with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Performance Evaluation of Fine Graded Superpave Mixtures for Surface Courses by : N. Pau Khosla
Download or read book Performance Evaluation of Fine Graded Superpave Mixtures for Surface Courses written by N. Pau Khosla and published by . This book was released on 2001 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: Strategic Highway Research Program (SHRP) A407 recommends that aggregate gradations pass below the restricted zone as traffic level increases. This study investigated the use of natural sand in the fine and coarse gradations for the surface course mixtures. The mixtures were designed using the SUPERPAVE mix design approach and were evaluated for their performance in terms of resistance to rutting, fatigue and moisture damage. In addition, the accelerated performance of these mixtures was also evaluated using the Asphalt Pavement Analyzer.
Book Synopsis Creep and Fatigue Characteristics of Superpave Mixtures by : Stacey D. Diefenderfer
Download or read book Creep and Fatigue Characteristics of Superpave Mixtures written by Stacey D. Diefenderfer and published by . This book was released on 2005 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laboratory creep and fatigue testing was performed on five Superpave surface hot-mix asphalt mixtures placed at the Virginia Smart Road. Differences in creep and fatigue response attributable to production and compaction methods were investigated. In addition, changes in creep response resulting from differences in specimen size were evaluated. Further, an evaluation of the effects of loading frequency, presence of rest periods, and specimen location within the pavement on fatigue life was conducted. Creep compliance values were determined using viscoelastic-based calculations, and time-temperature superposition was used to generate mastercurves. Reported creep compliance response models from the literature were found inadequate for accurately describing the creep compliance mastercurves generated during this study. Differences in creep response between specimens of different sizes were found to be due to specimen and test variability, rather than size. An evaluation of the effects of laboratory and plant production and laboratory and field compaction was inconclusive as material variability appeared greater than production or compaction variability. Simple regression models were found to be satisfactory for use in the development of prediction models for fatigue, although test data are necessary for calibration to particular mixture types. No relationships were found between fatigue model coefficients and volumetric properties of the mixtures tested because of the limited range of volumetric properties. Variability in volumetric properties between the mixtures produced at the plant and those produced to match the job mix formula did not significantly influence the predicted laboratory fatigue performance. Laboratory fatigue lives were similar between the laboratory-compacted fatigue specimens and specimens cut from the pavement; differences observed in performance were attributable to different air void contents. Predicted fatigue life was found to be statistically independent of the frequency of the applied loads or presence of rest periods for the mixtures, frequencies, and rest periods considered in this study. Minimal differences were observed between fatigue life predictions for plant-produced, field-compacted specimens cut from different locations in the pavement. This study contributes to the understanding of the factors involved in creep and fatigue performance of asphalt mixtures. The mixture responses characterized by this study are related to the rutting and fatigue performance of asphalt pavements. The choice of appropriate asphalt materials to resist rutting and fatigue deterioration will result in reduced maintenance needs and longer service lives for pavements.
Book Synopsis Performance Tests for Hot Mix Asphalt (HMA) Including Fundamental and Empirical Procedures by : Louay Nadhim Mohammad
Download or read book Performance Tests for Hot Mix Asphalt (HMA) Including Fundamental and Empirical Procedures written by Louay Nadhim Mohammad and published by ASTM International. This book was released on 2006 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Anisotropy on Compressive and Tensile Properties of Asphalt Mixtures by : MS. Mamlouk
Download or read book Effect of Anisotropy on Compressive and Tensile Properties of Asphalt Mixtures written by MS. Mamlouk and published by . This book was released on 2002 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The research effort in this paper was part of the Superpave Support and Performance Models Management Project (Advanced Material Characterization) and was funded by the National Cooperative Highway Research Program Project 9-19. Anisotropy of hot mix asphalt materials greatly depends on specimen preparation, testing conditions, and test parameters under consideration. The objective of this study was to evaluate the anisotropy of selected test properties for specimens specially prepared with the Superpave gyratory compactor and cored in the vertical, horizontal, and diagnonal directions. The number of gyrations during compaction was adjusted on a trial-and-error basis to produce cores having air void contents of 4.0 ± 0.5% regardless of the direction of coring. Confined compression and tension tests were performed on the cored test specimens. The analysis included parameters such as the compressive / tensile strength, modulus of elasticity, and strain at failure. All test results were analyzed statistically. The majority of the test results (compression and tension) showed no significant effect of test specimen orientation on the test parameters at the 5% level of significance and for the test conditions used in the study. These results indicated that anisotropic effects might be ignored for the asphalt mixture used in this study using the special preparation method in the Superpave gyratory compactor.
Book Synopsis Engineering Properties of Asphalt Mixtures and the Relationship to Their Performance by : Gerald A. Huber
Download or read book Engineering Properties of Asphalt Mixtures and the Relationship to Their Performance written by Gerald A. Huber and published by ASTM International. This book was released on 1995 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thirteen papers presented at the conference on [title], held in Phoenix, Arizona, December, 1994, discuss the products of the strategic highway research program, the Superpave method of mix design, and test methods for fatigue cracking and permanent deformation. Lacks an index. Annotation c. by Book
Book Synopsis Materials-related Forensic Analysis and Special Testing, Pennsylvania Department of Transportation by : Michael Boyle
Download or read book Materials-related Forensic Analysis and Special Testing, Pennsylvania Department of Transportation written by Michael Boyle and published by . This book was released on 2003 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report relates to the use of Superpave 4.75mm Nominal Maximum Aggregate Size (NMAS) mixtures. This NMAS mixture suitability for thin overlay applications, such as those less than 40mm in depth, workability, and positive appearance throughthe minimization of segregation are the desirable qualities of this HMA mix. Current AASHTO standards and specifications for Superpave do not include Superpave 4.75mm NMAS mixtures. In this study, the Department chooses to analyze three 4.75mm NMAS HMA mixture that were developed using the Superpave volumetric mix design method and one PENNDOT ID-2 Wearing Course mixture developed using the Marshall mix design method. The three 4.75mm mixtures include a control (dense-graded) mixture; a mixture containing crumb-rubber additive; and a mixture containing crumb-rubber additive in combination with Vestenamer, a proprietary asphalt/crumb rubber modifier manufactured by DeGussa.
Book Synopsis The Use of Reclaimed Asphalt Pavement in New SUPERPAVE Asphalt Concrete Mixtures by :
Download or read book The Use of Reclaimed Asphalt Pavement in New SUPERPAVE Asphalt Concrete Mixtures written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Simple Performance Test for Superpave Mix Design by : Matthew W. Witzcak
Download or read book Simple Performance Test for Superpave Mix Design written by Matthew W. Witzcak and published by Transportation Research Board. This book was released on 2002 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Quality Control and Acceptance of Superpave-designed Hot Mix Asphalt by : Ronald J. Cominsky
Download or read book Quality Control and Acceptance of Superpave-designed Hot Mix Asphalt written by Ronald J. Cominsky and published by . This book was released on 1998 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hot Mix Asphalt Materials, Mixture Design, and Construction by :
Download or read book Hot Mix Asphalt Materials, Mixture Design, and Construction written by and published by . This book was released on 2009 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt:
