Performance Based Asphalt Mixture Design
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Performance Based Asphalt Mixture Design
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Author :
language : en
Publisher:
Release Date : 1994
Performance Based Asphalt Mixture Design written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.
This paper discusses the SUPERPAVE System of products which resulted from the Stretegic Highway Research Program (SHRP). These products addressed the following pavement distresses for dense graded asphalt mixtures: permanent deformation, fatigue cracking, low temperature cracking, including the effects of aging and moisture damage of these distresses. Although other types of pavement distress in hot mix asphalt pavement were recognized by the SHRP planners, a decision was made not to include them in this research effort. The final products of the program are: 1. A performance-based specification for asphalt binders complete with supporting tests; A performance-based specification for asphalt-aggregate mixtures complete with supporting tests and performance prediction modls; 3. A mixture design and analysis system which incorporates both the asphalt binder specification and the asphalt mixture specification; 4. A protocol to evaluate modified asphalt binder and 5. a SUPERPAVE software support system. For the covering abstract of this conference, see IRRD number 863140.
Performance Based Asphalt Mixture Design Pbd For Arkansas
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Author :
language : en
Publisher:
Release Date : 2022
Performance Based Asphalt Mixture Design Pbd For Arkansas written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022 with Pavements categories.
Innovative Assessment Tests And Indicators For Performance Based Asphalt Mix Design
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Author : Hamza Alkuime
language : en
Publisher:
Release Date : 2019
Innovative Assessment Tests And Indicators For Performance Based Asphalt Mix Design written by Hamza Alkuime and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with Pavements, Asphalt categories.
Asphalt mixes are designed to provide adequate resistance to various distresses including cracking, rutting, and moisture damage. Recently, more efforts are directed towards including performance assessment tests during the design and production of asphalt mixes. Performance-Engineered Mix Design (PEMD) or Balanced Mix Design (BMD) is a new and innovative design approach that incorporates performance assessment tests to optimize the design of asphalt mixes to provide adequate performance. Although transportation agencies are motivated to implement the PEMD approach, several research knowledge gaps and concerns need to be addressed before PEMD successful implementation. This research study aims to advance, develop, and implement performance-engineered design approach and specifications to extend the service life of asphalt pavements.The first phase of this research developed and evaluated a new and innovative monotonic cracking performance indicator called Weibull Cracking Resistance Index (WeibullCRI). The proposed indicator describes the entire load-displacement curve, which overcomes the limitations of the existing performance indicators. First, WeibullCRI was examined using an extensive laboratory evaluation of 16 different asphalt mixes. The results indicated that WeibullCRI was sensitive to variation in binder content and binder PG and the results were in good agreement with the expected cracking resistance based on the composition of the studied mixes. In addition, WeibullCRI had low variability in test results and higher number of various statistical groups. Next, the applicability of WeibullCRI as a unified approach to analyze the results of various monotonic assessment tests was investigated using data generated by other researchers and reported in the literature. The results indicated that WeibullCRI is able to interpret the testing results of various monotonic performance assessment tests (i.e., IDT- intermediate temperature, Semi-Circle Bending [SCB]- intermediate temperature, SCB-low temperature, Disk-Shaped Compact Tension [DCT], and Simple Punching Shear Test [SPST]) and various displacement measurement methods (i.e., actuator vertical displacement and Crack Mouth Opening Displacement [CMOD]). WeibullCRI was also sensitive to variation in test conditions (i.e., specimen notch depth, thickness, and air void content) and mix composition proportions (i.e., binder content, binder grade, aggregate type, NMAS, aging, rejuvenator dosages, and Recycled Asphalt Pavement [RAP] materials).The second phase of this study reviewed and evaluated the current monotonic cracking performance assessment tests and indicators including the developed WeibullCRI used to assess asphalt mix resistance to cracking. In this phase, the testing requirements of various test standards, key publications, concepts, calculation methods, physical meaning, and advantages and disadvantages of various performance indicators were reviewed. Then, the study investigated the validity of the most promising testing standards and indicators. Three testing standards and 12 performance indicators were considered. Several aspects were examined including 1) investigate the fundamental meaning of the variation in the load-displacement curve in terms of the change in mix resistance to cracking, 2) sensitivity of performance indicators to mix compositions, 3) variability in test results, 4) number of various statistical groups, 5) correlation between various performance indicators, 6) direct correlation between laboratory results of monotonic performance tests and indicators with the observed field cracking, and 7) ability to develop PEMD specifications. A comprehensive laboratory investigation was conducted using 33 different asphalt mixes included six Laboratory Mixed-Laboratory Compacted (LMLC) and 10 Plant Mixed-Laboratory Compacted (PMLC) asphalt mixes, and 17 field projects with known cracking performance. The results showed that WeibullCRI calculated from the IDT test to have the lowest test variability, maximum number of Tukey's honestly significant difference (HSD) groups, and have excellent correlation with cyclic cracking resistance assessment indicators as compared to the other monotonic performance indicators. In addition, the results demonstrated that there was no direct correlation between all monotonic performance indicators and the observed field cracking performance, therefore an alternative approach was proposed, evaluated, and validated to develop performance thresholds for the selected performance indicators. Three pass/fail cracking performance thresholds were proposed for WeibullCRI to distinguish between asphalt mixes with good, fair, and poor cracking resistance using the proposed approach.The third phase of this study focused on the development and evaluation of a new cyclic cracking assessment test called Multi-Stage Semi-circle bending Dynamic (MSSD). The test offers advantages over the available monotonic and dynamic cracking assessment tests and addresses major concerns to implement the PEMD (i.e., performance test validity, complex specimen preparation, and testing time). The developed MSSD test simulates the repeated loading (cyclic) in a reasonable testing time (less than 9 hours per test regardless of mix type), has a fixed loading sequence that works for mixes with different characteristics (e.g., mix composition, percent air void content, thickness, etc.), and utilizes testing equipment and specimen geometry similar to that used in monotonic tests. The laboratory evaluation results showed that the proposed test and its derived performance indicators were sensitive to mix composition and had lower variability compared to other dynamic tests. In addition, the MSSD performance indicators correlated well with the observed cracking performance in the field and were able to distinguish between projects with good and poor resistance to cracking. Based on the evaluation results, three pass/fail cracking performance thresholds were proposed to distinguish between asphalt mixes with good, fair, and poor resistance to cracking.The fourth phase of this research examined the most promising tests and performance indicators to evaluate the resistance of asphalt mixtures to rutting. Two tests (i.e., Hamburg Wheel Tracking test [HWTT], and Asphalt Pavement Analyzer [APA] rut test) and three rutting performance indicators (i.e., HWTT rut depth after 15,000 passes [HWTT15000], HWTT rut depth at 20,000 passes [HWTT20000], and APA rut depth after 8,000 cycles [APA8000]) were considered. An intensive laboratory investigation was conducted that included six LMLC, 10 PMLC, and field cores extracted from 17 field projects. The research findings showed that both HWTT and APA rut test provided similar rutting assessment for the evaluated mixes. The study recommended using the HWTT over the APA rut test since HWTT can be also used to assess the resistance of asphalt mixtures to moisture damage to moisture damage. Also, the study recommended using HWTT15000 over HWTT20000 as a performance indicator since it requires less testing time.The final phase of this research provided recommendations of the best testing standards, performance indicators, and performance specifications to assess asphalt mix resistance to cracking and rutting. In addition, it provided guidelines to demonstrate the use of the proposed tools during the design and/or production of asphalt mixes. It also proposed standards testing procedures for the newly developed WeibullCRI performance indicator and MSSD test.
The Superpave Mix Design System Manual Of Specifications Test Methods And Practices
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Author : Edward T. Harrigan
language : en
Publisher: Strategic Highway Research Program (Shrp)
Release Date : 1994
The Superpave Mix Design System Manual Of Specifications Test Methods And Practices written by Edward T. Harrigan and has been published by Strategic Highway Research Program (Shrp) this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Technology & Engineering categories.
The final product of the Strategic Highway Research Program (SHRP) Asphalt Research Program is the SUPERPAVE (registered trademark) mix design system for new construction and overlays. This system employs a series of new performance-based specifications, test methods, and practices for material selection, accelerated performance testing, and mix design. This report documents these new specifications and procedures in a format suitable for eventual American Association of State Highway and Transportation Officials (AASHTO) standardization.
Asphalt Mixture Specification And Testing
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Author : Cliff Nicholls
language : en
Publisher: CRC Press
Release Date : 2017-05-12
Asphalt Mixture Specification And Testing written by Cliff Nicholls and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-05-12 with Technology & Engineering categories.
This guide reviews the way asphalt mixture can be specified, with particular emphasis on the test methods used to measure performance. The advantages and limitations of the tests are described for measuring the desired property, and engineers can specify a test according to the material’s use. The book starts with a resume of specifications and their relative advantages and disadvantages for different situations. Then different properties are discussed in terms of: their specification; the test methods that can be used (primarily the EN 12697 suite of European methods, of which the author has been responsible for drafting); the extent to which the results predict performance; the levels that can be achieved with different asphalt mixes and types; what levels, if any, should be specified in various situations and pavement layers; and which other properties are adversely affected by enhanced performance. The final section covers various aspects of sustainability, with a strong emphasis on durability. Better understanding should enable clients and consultants who specify pavements to produce durable asphalt pavements more economically, and also help asphalt producers and students trying to understand the black art of asphalt.
Mixture Design And Performance Based Specifications For Cold Patching Mixtures
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Author : Vanessa I. Rosales-Herrera
language : en
Publisher:
Release Date : 2007
Mixture Design And Performance Based Specifications For Cold Patching Mixtures written by Vanessa I. Rosales-Herrera and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Asphalt categories.
Development And Validation Of Performance Prediction Models And Specifications For Asphalt Binders And Paving Mixes
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Author : Robert L. Lytton
language : en
Publisher: Strategic Highway Research Program (Shrp)
Release Date : 1993
Development And Validation Of Performance Prediction Models And Specifications For Asphalt Binders And Paving Mixes written by Robert L. Lytton and has been published by Strategic Highway Research Program (Shrp) this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Asphalt concrete categories.
A result of the Strategic Highway Research Program's asphalt research is the development of performance-based specifications for asphalt binders and mixtures to control 3 distress modes: rutting; fatigue cracking; and thermal cracking. The SHRP A-005 project developed detailed pavement performance models to support these binder and mixture specifications and performance-based mixture designs. This report documents the findings of this extensive research effort and provides supporting data for the performance-based specifications and mixture design procedure called SUPERPAVE. The A-005 contract developed and used a sophisticated, mechanistic-based pavement performance model to define the relationships between asphalt binder and mixture properties and pavement distress. A comprehensive pavement performance model was developed that predicts the amount of fatigue cracking, thermal cracking and rutting in asphalt concrete pavements with time, using results from the accelerated laboratory tests. The pavement performance models for each distress were also used to confirm the relevant binder and mixture properties established by other SHRP contractors. The model has 3 parts: a mixture evaluation model; a pavement response model; and a pavement distress model.
Engineering Properties Of Asphalt Mixtures And The Relationship To Their Performance
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Author : Gerald A. Huber
language : en
Publisher: ASTM International
Release Date : 1995
Engineering Properties Of Asphalt Mixtures And The Relationship To Their Performance written by Gerald A. Huber 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 emulsion mixtures categories.
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
Mixture Design Manual And Performance Based Specifications For Cold Patching Mixtures
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Author : Vanessa I. Rosales-Herrera
language : en
Publisher:
Release Date : 2008
Mixture Design Manual And Performance Based Specifications For Cold Patching Mixtures written by Vanessa I. Rosales-Herrera and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Asphalt categories.
New Design Method Of Asphalt Mixtures Considering Uncertainty
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Author : Said M. Easa
language : en
Publisher:
Release Date : 2018
New Design Method Of Asphalt Mixtures Considering Uncertainty written by Said M. Easa 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 categories.
The existing methods of asphalt mixture design are deterministic and rely only on the means of design parameters, such as unit weight and volumetric properties. This article presents a new design method of asphalt mixtures that considers the uncertainties of the measured properties and the calculated design parameters, represented by the coefficient of variation (CV). The uncertainties of the measured properties (typically CV 1 %) propagate through the calculations and could result in high uncertainties in the calculated design parameters (e.g.,CV 40 %) that make them unreliable. The proposed method is developed in the context of the Marshall mix-design method and is applicable to the Superior Performing Asphalt Pavements method with minor modifications. The Taylor series expansion was used to develop the moments (mean and standard deviation) and CV of the calculated design parameters. The developed formulas were verified using Monte Carlo simulation. Criteria for sample acceptance are then presented based on the uncertainties of the design parameters. The uncertainty information is then used to establish confidence intervals for the design parameters, determine the optimum asphalt content, and compare the results with project specifications. Sensitivity analysis of the mix-design parameters is conducted, and practical implications are discussed. Numerical examples are presented to demonstrate the application of the proposed method. The proposed method takes the design of asphalt mixtures one step further toward a reliable performance-based design. As such, the method should be of interest to pavement engineers and practitioners.