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.
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.
Download or read book Characteristics of Asphalt Binders written by and published by . This book was released on 1996 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Download or read book Polymer layered Silicate Nanocomposites written by Masami Okamoto and published by iSmithers Rapra Publishing. This book was released on 2003 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: The review sets out to highlight the major developments in this field over the last decade. The different techniques used to prepare PLS nanocomposites are covered. The physicochemical characterisation of PLS nanocomposites and the improved materials properties that those materials can display are discussed. An additional indexed section containing several hundred abstracts from the Rapra Polymer Library database provides useful references for further reading.
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:
Download or read book Nanotechnology in Eco Efficient Construction written by Fernando Pacheco-Torgal and published by Elsevier. This book was released on 2013-04-04 with total page 459 pages. Available in PDF, EPUB and Kindle. Book excerpt: As the environmental impact of existing construction and building materials comes under increasing scrutiny, the search for more eco-efficient solutions has intensified. Nanotechnology offers great potential in this area and is already being widely used to great success. Nanotechnology in eco-efficient construction is an authoritative guide to the role of nanotechnology in the development of eco-efficient construction materials and sustainable construction.Following an introduction to the use of nanotechnology in eco-efficient construction materials, part one considers such infrastructural applications as nanoengineered cement-based materials, nanoparticles for high-performance and self-sensing concrete, and the use of nanotechnology to improve the bulk and surface properties of steel for structural applications. Nanoclay-modified asphalt mixtures and safety issues relating to nanomaterials for construction applications are also reviewed before part two goes on to discuss applications for building energy efficiency. Topics explored include thin films and nanostructured coatings, switchable glazing technology and third generation photovoltaic (PV) cells, high-performance thermal insulation materials, and silica nanogel for energy-efficient windows. Finally, photocatalytic applications are the focus of part three, which investigates nanoparticles for pollution control, self-cleaning and photosterilisation, and the role of nanotechnology in manufacturing paints and purifying water for eco-efficient buildings.Nanotechnology in eco-efficient construction is a technical guide for all those involved in the design, production and application of eco-efficient construction materials, including civil engineers, materials scientists, researchers and architects within any field of nanotechnology, eco-efficient materials or the construction industry. - Provides an authoritative guide to the role of nanotechnology in the development of eco-efficient construction materials and sustainable construction - Examines the use of nanotechnology in eco-efficient construction materials - Considers a range of important infrastructural applications, before discussing applications for building energy efficiency
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.
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.
Download or read book Modeling and Design of Flexible Pavements and Materials written by Dallas N. Little and published by Springer. This book was released on 2017-09-25 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook lays out the state of the art for modeling of asphalt concrete as the major structural component of flexible pavements. The text adopts a pedagogy in which a scientific approach, based on materials science and continuum mechanics, predicts the performance of any configuration of flexible roadways subjected to cyclic loadings. The authors incorporate state-of the-art computational mechanics to predict the evolution of material properties, stresses and strains, and roadway deterioration. Designed specifically for both students and practitioners, the book presents fundamentally complex concepts in a clear and concise way that aids the roadway design community to assimilate the tools for designing sustainable roadways using both traditional and innovative technologies.
Download or read book Hot mix Asphalt Mixtures written by and published by . This book was released on 1999 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the 9th International Conference on Maintenance and Rehabilitation of Pavements Mairepav9 written by Christiane Raab and published by Springer Nature. This book was released on 2020-06-19 with total page 955 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers the proceedings of an international conference held at Empa (Swiss Federal Laboratories for materials Science and Technology) in Dübendorf, Switzerland, in July 2020. The conference series was established by the International Society of Maintenance and Rehabilitation of Transport Infrastructure (iSMARTi) for promoting and discussing state-of-the-art design, maintenance, rehabilitation and management of pavements. The inaugural conference was held at Mackenzie Presbyterian University in Sao Paulo, Brazil, in 2000. The series has steadily grown over the past 20 years, with installments hosted in various countries all over the world. The respective contributions share the latest insights from research and practice in the maintenance and rehabilitation of pavements, and discuss advanced materials, technologies and solutions for achieving an even more sustainable and environmentally friendly infrastructure.
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:
Download or read book Nanotechnology in Civil Infrastructure written by Kasthurirangan Gopalakrishnan and published by Springer Science & Business Media. This book was released on 2011-03-31 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanotechnology in Civil Infrastructure is a state-of-the art reference source describing the latest developments in nano-engineering and nano-modification of construction materials to improve the bulk properties, development of sustainable, intelligent, and smart concrete materials through the integration of nanotechnology based self-sensing and self-powered materials and cyber infrastructure technologies, review of nanotechnology applications in pavement engineering, development of novel, cost-effective, high-performance and long-lasting concrete products and processes through nanotechnology-based innovative processing of cement and cement paste, and advanced nanoscience modeling, visualization, and measurement systems for characterizing and testing civil infrastructure materials at the nano-scale. Researchers, practitioners, undergraduate and graduate students engaged in nanotechnology related research will find this book very useful.
Download or read book Characterization of Alaskan Modified Asphalt Binders and Mixtures written by Jun Liu and published by . This book was released on 2021 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Modified asphalt binders and mixtures have been used more in recent years in Alaska. However, there has not been systematic characterization and performance data development for these materials. This study intends to systematically characterize the Alaskan asphalt binders and mixtures and identify the performance benefits of these materials through laboratory tests and field sections monitoring. The research contains five sections: 1) a comprehensive characterization on the morphologies, chemical and rheological properties of modified asphalt binders and mechanical properties of asphalt mixtures with these modified asphalt binders. The lab testing results were further confirmed through field surveys of recent paving projects constructed in Alaska and data from pavement sections in long-term pavement performance database. 2) an investigation on the applicability of the multiple stress creep recovery (MSCR) tests to evaluate the rutting resistance of Alaskan modified asphalt binders. Within the scope of the study, significance of MSCR key testing factors was assessed through four test methods with different testing protocols and procedures. 3) an evaluation of cracking susceptibility of Alaskan modified asphalt binders using various chemical and rheological indices. 4) an investigation on the connections between the chemical changes by oxidation with the rheological parameters. 5) A study to characterize the fatigue behaviors of the Alaskan highly polymerized asphalt binders using newly developed linear amplitude sweep (LAS) test with viscoelastic continuum damage (VECD) model"--Abstract, page iv.
Download or read book Nanostructured Materials for Engineering Applications written by Carlos P. Bergmann and published by Springer Science & Business Media. This book was released on 2011-08-28 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives an introduction to nanostructured materials and guides the reader through their different engineering applications. It addresses the special phenomena and potentials involved in the applications without going into too much scientific detail of the physics and chemistry involved, which makes the reading interesting for beginners in the field. Materials for different applications in engineering are described, such as those used in opto-electronics, energy, tribology, bio-applications, catalysis, reinforcement and many more. In each application chapter, the reader will learn about the phenomena involved in the application, the nanostructured materials used in the field and their processing, besides finding some practical examples of their use in laboratories and in industry.The clear language and the application-oriented perspective of the book makes it suitable for both engineers and students who want to learn about applications of nanostructured materials in Engineering.
Download or read book 8th RILEM International Symposium on Testing and Characterization of Sustainable and Innovative Bituminous Materials written by Francesco Canestrari and published by Springer. This book was released on 2015-09-24 with total page 1024 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work presents the results of RILEM TC 237-SIB (Testing and characterization of sustainable innovative bituminous materials and systems). The papers have been selected for publication after a rigorous peer review process and will be an invaluable source to outline and clarify the main directions of present and future research and standardization for bituminous materials and pavements. The following topics are covered: - Characterization of binder-aggregate interaction - Innovative testing of bituminous binders, additives and modifiers - Durability and aging of asphalt pavements - Mixture design and compaction analysis - Environmentally sustainable materials and technologies - Advances in laboratory characterization of bituminous materials - Modeling of road materials and pavement performance prediction - Field measurement and in-situ characterization - Innovative materials for reinforcement and interlayer systems - Cracking and damage characterization of asphalt pavements - Recycling and re-use in road pavements This is the proceedings of the RILEM SIB2015 Symposium (Ancona, Italy, October 7-9, 2015).
