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Asphalt Binder Aging Methods To Accurately Reflect Mixture Aging
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Book Synopsis Asphalt Binder Aging Methods to Accurately Reflect Mixture Aging by :
Download or read book Asphalt Binder Aging Methods to Accurately Reflect Mixture Aging written by and published by . This book was released on 2021 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: Asphalt binders experience aging that occurs in two distinct stages under quite different conditions: (1) short-term during construction (plant mixing, storage, placement, and compaction) and (2) long-term during the service life of the pavement. The TRB National Cooperative Highway Research Program's pre-publication of NCHRP Research Report 967: Asphalt Binder Aging Methods to Accurately Reflect Mixture Aging documents research conducted to improve laboratory binder conditioning methods to accurately simulate the short-term and long-term aging of asphalt binders, and to calibrate the improved procedures to the aging that occurs during mixture production, transport, and placement as well as during the service life of the pavement structure.
Download or read book Aging written by Chris A. Bell and published by . This book was released on 1994 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research was conducted as part of the Strategic Highway Research Program (SHRP) A-003A contract at Oregon State University to validate the findings of SHRP contracts A-002A and A-003B with regard to aging. One short-term and four long-term aging methods were used to simulate aging of asphalt-aggregate mixes in the field. Four aggregates and eight asphalts for a total of 32 different material combinations were tested using the different aging methods. Results of the aging studies are compared with the A-002A and A-003B studies of asphalt binder or asphalt mixed with fine aggregate. This research concludes that aging of asphalt mixes cannot be predicted by tests on asphalt binder alone since results show that aggregates have considerable influence on aging.
Book Synopsis Long-term Aging of Asphalt Mixtures for Performance Testing and Prediction by : Y. Richard Kim
Download or read book Long-term Aging of Asphalt Mixtures for Performance Testing and Prediction written by Y. Richard Kim and published by . This book was released on 2018 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Evaluation of Laboratory Compactors and Binder Aging Methods for Hot Mix Asphalt (HMA) by : Rajib Basu Mallick
Download or read book An Evaluation of Laboratory Compactors and Binder Aging Methods for Hot Mix Asphalt (HMA) written by Rajib Basu Mallick and published by . This book was released on 1997 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Summary Report on Aging of Asphalt-aggregate Systems by : Chris A. Bell
Download or read book Summary Report on Aging of Asphalt-aggregate Systems written by Chris A. Bell and published by . This book was released on 1989 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a report on the state of the art of research on the phenomenon of the aging of asphalt-aggregate mixtures. Compared to research on the aging of asphalt cement, there has been little research on the aging of asphalt mixtures. Binder studies are considered as well as mixture sutdies, the relationship between laboratory aging tests and field performance, and the relationship between chemical composition and field performance. Recommendations are made for aging procedures which show promise for laboratory investigation. Test methods to evaluate aging are also considered. It is noted that extended heating procedures show the most promise for short-term aging and pressure oxidation and/or extended heating the most promise for long-term aging.
Book Synopsis The effects of laboratory aging methods on the rheology of asphalt binders by : Chayatan Phromsorn
Download or read book The effects of laboratory aging methods on the rheology of asphalt binders written by Chayatan Phromsorn and published by . This book was released on 1995 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of Short-term Laboratory Aging of Neat and Modified Asphalt Binders by : David A. Anderson
Download or read book Investigation of Short-term Laboratory Aging of Neat and Modified Asphalt Binders written by David A. Anderson and published by Transportation Research Board. This book was released on 2012 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: "TRB's National Cooperative Highway Research Program (NCHRP) Report 709: Investigation of Short-Term Laboratory Aging of Neat and Modified Asphalt Binders provides a proposed method of testing for short-term laboratory aging of neat and modified asphalt binders using the modified German rotating flask as an alternative to the rolling thin film oven test. The following appendixes A-E to NCHRP Report 709 are only available in electronic format."--
Book Synopsis A Novel Approach to Understanding Asphalt Binder Aging Behavior Using Asphaltene Proportion as a Performance Indicator by : Yogesh Shamsunder Kumbargeri
Download or read book A Novel Approach to Understanding Asphalt Binder Aging Behavior Using Asphaltene Proportion as a Performance Indicator written by Yogesh Shamsunder Kumbargeri and published by . This book was released on 2015 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objective of this research study was to formulate and deduce aging indices and parametric models with asphaltene as a performance indicator using virgin and modified asphalt binders. The estimated asphaltene content of binders increased from unaged to short-term and subsequently to long-term aged condition. Also, modified binders had higher asphaltene contents than virgin binders. Asphaltene content was found to be a truly valuable aging performance assessor to investigate asphalt binder aging characteristics in a rational manner. Asphalt aging parametric models were developed using asphaltene content and fundamental binder properties, which were mathematically robust. The parametric models precisely predicted rational aging performance of asphalt binders at different aging combinations. A final binder aging predictive model was recommended that relates short- and long-term aging conditions, which had excellent rational correlations. A novel approach was taken in this study that synergized asphalt binder rheological properties and aging performance criteria specifically incorporating asphaltene, which is a chemical parametric indicator pertinent to asphalt aging characterization and evaluation.
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:
Book Synopsis A Comparison of Warm Asphalt Binder Aging with Laboratory Aging Procedures by : Tejash Gandhi
Download or read book A Comparison of Warm Asphalt Binder Aging with Laboratory Aging Procedures written by Tejash Gandhi and published by . This book was released on 2010 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Warm asphalt has been gaining increasing popularity in recent years; however there are several characteristics about warm asphalt that are still unknown. While several studies have been conducted to study the performance of warm asphalt mixtures, aging characteristics of warm mix asphalt (WMA) binders are not known in great detail. This paper presents the results of a limited study to evaluate the aging characteristics of two WMA binders artificially aged in the rolling thin film oven (RTFO) and the pressure aging vessel and comparing them with binder extracted from freshly prepared and artificially aged warm asphalt mixtures. RTFO aging was performed at 163°C and a lower temperature to simulate warm asphalt aging. Tests on binders aged in the laboratory and binders extracted from freshly mixed and aged mixtures indicated that the WMA binders extracted from WMA mixtures had significantly lower viscosities and G*/sin ? compared to binders extracted from hot mix asphalt (HMA) and binders aged in the RTFO at 163°C (325°F). This indicates that the lower mixing and compaction temperatures reduce the aging of the warm asphalt binders. Also, binders extracted from WMA had significantly lower creep stiffness values and significantly higher m-values compared to warm asphalt binders aged in the RTFO at 163°C (325°F) and binders extracted from HMA. Binders containing WMA additives did not have higher G* sin ? values, indicating that the warm asphalt additives do not negatively affect the fatigue properties of the binders. Gel permeation chromatography analysis indicated that the addition of the warm asphalt additives did not have any significant effect on the %LMS of the binders used in this study.
Book Synopsis Selection of Laboratory Aging Procedures for Asphalt-aggregate Mixtures by : C. A. Bell
Download or read book Selection of Laboratory Aging Procedures for Asphalt-aggregate Mixtures written by C. A. Bell and published by Strategic Highway Research Program (Shrp). This book was released on 1994 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two major effects dominate aging of asphalt-aggregate mixtures: 1) loss of volatile components and oxidation in the construction phase (short-term aging) and 2) progressive oxidation of the in-place mixture in the field (long-term aging). Aging results in hardening (stiffening) of a mixture, which alters its performance both positively and negatively. This report presents the results of a preliminary investigation to evaluate aging methods for asphalt-aggregate mixtures. Short-term methods included oven aging and extended mixing, while long-term methods included oven aging and oxygen enrichment. The effects of temperature and aging duration are presented. The effects of aging were determined using the diametral resilient modulus test. Recommendations for short- and long-term aging are provided.
Book Synopsis Laboratory Evaluation of Aging for Asphalt-aggregate Mixtures by : Dan Sosnovske
Download or read book Laboratory Evaluation of Aging for Asphalt-aggregate Mixtures written by Dan Sosnovske and published by . This book was released on 1994 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research was conducted as part of the Strategic Highway Research Program (SHRP) A-003A contract at Oregon State University to validate the findings of SHRP contracts A-002A and A-003B with regard to aging of asphalt-aggregate mixtures. One short-term and four long-term aging methods were used to simulate aging of asphalt-aggregate mixes in the field. Four aggregates and eight asphalts for a total of 32 different material combinations were tested using different aging methods. Results of the aging studies are compared with the A-002A and A-003B studies of asphalt binder or asphalt mixed with fine aggregate. This research concludes that aging of asphalt mixes cannot be predicted by tests on asphalt binder alone since results show that aggregates have considerable influence on aging.
Book Synopsis The Influence of Laboratory Aging Method on the Rheological Properties of Asphalt Binders by : A. Abbas
Download or read book The Influence of Laboratory Aging Method on the Rheological Properties of Asphalt Binders written by A. Abbas and published by . This book was released on 2002 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Asphalt binders used in asphalt concrete roadway pavements experience aging during construction and subsequently during their service lives. Aging is the combined effect of the evaporation of volatile compounds and the chemical reaction of residual compounds with oxygen. This aging affects the rheological properties of asphalt binders. The SuperpaveTM testing and specification system uses two laboratory procedures for aging of binders prior to measuring their rheological properties, namely the rolling thin film oven (RTFO) and the pressure aging vessel (PAV). These two procedures are used to simulate the aging that takes place during construction and during service, respectively. This paper examines whether the SuperpaveTM prescribed sequence of binder aging procedures (i.e., the RTFO followed by the PAV) is necessary, or whether similar binder rheological properties are obtained using the PAV procedure only. For this purpose, three binders were tested, namely an unmodified PG 64-28, an SBS polymer-modified binder of the same grade, and an SBS polymer-modified PG 76-28. The low temperature and fatigue rheological properties were measured by a bending beam rheometer (BBR) and a dynamic shear rheometer (DSR), respectively. The findings of the study suggest that, with a few exceptions, the rheological properties measured after aging with the RTFO followed by PAV are significantly different than those obtained after PAV aging only.
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:
Download or read book NCHRP Report 709 written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Performance Evaluation of Warm-Mix Recycled Asphalt Binders After Long-Term Aging by : Qiang Li
Download or read book Performance Evaluation of Warm-Mix Recycled Asphalt Binders After Long-Term Aging written by Qiang Li and published by . This book was released on 2019 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study evaluates the pavement performance evolution of warm-mix recycled asphalt binders during the secondary service period. Warm-mix recycled asphalt binders with various long-term aging levels and recycling plans were produced by the laboratory simulation method. Conventional physical properties tests, the dynamic shear rheometer test, and the bending beam rheometer test were conducted to measure the performance of recycled binders. Effects of the aging level and recycling plan on the resistance to rutting, fatigue cracking, and low temperature cracking were investigated by statistical methods. It was found that after secondary long-term aging, recycled binders are more resistant to rutting, while they are less resistant to fatigue and low temperature cracking. The modified aging kinetic model can be used to accurately characterize the effect of secondary aging time on rutting or fatigue factors for recycled binders. The resistance of aged binders to fatigue and low temperature cracking is obviously improved by adding the warm mix asphalt additive. By comparison, using styrene butadiene rubber latex enhances the binder performance in almost all aspects. The aging level has a more significant effect than the recycling plan for all performance parameters.
Book Synopsis Influence of Mixture Characteristics on the Oxidative Aging of Asphalt Binders by : Nathaniel Evan Morian
Download or read book Influence of Mixture Characteristics on the Oxidative Aging of Asphalt Binders written by Nathaniel Evan Morian and published by . This book was released on 2014 with total page 1802 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this research effort focused on the evaluation of asphalt mixtures with respect to thermal cracking. Preliminary investigations soon indicated that a fundamental evaluation of thermal cracking was highly dependent upon the more complicated understanding of asphalt binder oxidation. The oxidation of asphalt binders within an asphalt mixture were understood to potentially be influenced by the mixture characteristics (i.e. air void levels, binder content, etc.) and aggregate properties (i.e. aggregate absorption, gradation, etc.). Therefore, this study was conducted in order to investigate and quantify the effects different aggregate sources and mixture properties may have on the oxidation and thermal cracking performance of asphalt mixtures. The investigation specifically focused on quantifying the oxidation of the asphalt binder alone and as part of the asphalt mixture when subjected to isothermal oven aging. The oxidation parameters of pan-aged asphalt binders were quantified, according to the standard of practice in the industry. These parameters were then compared to extracted and recovered mixture-aged asphalt binders to examine the influence of the main aggregate and mixture factors on the binder oxidation. The study observed differences between the pan-aged and mixture-aged asphalt binders in terms of oxidation kinetics, rheological measures, and the combined effect represented as the hardening susceptibility. Further evaluation of the binder oxidation based upon the dynamic modulus measures indicated marked influences of the mixture characteristics, the individual component materials, and the interactions between the investigated factors. Differentiation of the experimental factors was further identified by the newly developed low-temperature evaluation method, Uniaxial Thermal Stress and Strain Test (UTSST). The UTSST provides a fundamental approach to characterize the thermo-viscoelastic properties of asphalt mixtures permitting the pragmatic evaluation of changes in the stiffness and overall behavior of mixtures as a function of oxidative aging. Five distinct stages in the UTSST modulus were identified as thermo-viscoelastic properties, which are identified as a function of temperature: viscous softening, viscous-glassy transition, glassy hardening, crack initiation, and fracture stages. Through consideration of the thermo-viscoelastic properties, marked differences in the binder oxidation were noted between the experimental factors. Typically, decreases in the viscous response of the mixtures as well as increases in both the stiffness and brittle behavior were observed with aging. The evaluation method provides definitive measures to monitor multiple aspects of the performance of asphalt mixtures subjected to thermal loading.
