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Development Of A Mix Design Process For Cold In Place Rehabilitation Using Foamed Asphalt
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Book Synopsis Development of a Mix Design Process for Cold-in-place Rehabilitation Using Foamed Asphalt by : Hosin David Lee
Download or read book Development of a Mix Design Process for Cold-in-place Rehabilitation Using Foamed Asphalt written by Hosin David Lee and published by . This book was released on 2003 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study evaluates one of the recycling techniques used to rehabilitate pavement, called Cold In-Place Recycling (CIR). CIR is one of the fastest growing road rehabilitation techniques because it is quick and cost-effective. The document reports on the current practice of CIR with emulsion, presents a literature review of research on foamed asphalt, discusses the foaming experiment, presents a field data collection and compaction study, and describes the determination of mix design parameters for CIR with foamed asphalt.
Book Synopsis Validation of the Mix Design Process for Cold In-place Rehabilitation Using Foamed Asphalt by : Hosin David Lee
Download or read book Validation of the Mix Design Process for Cold In-place Rehabilitation Using Foamed Asphalt written by Hosin David Lee and published by . This book was released on 2007 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: Asphalt pavement recycling has grown dramatically over the last few years as a viable technology to rehabilitate existing asphalt pavements. Iowa's current Cold In-place Recycling (CIR) practice utilizes a generic recipe specification to define the characteristic of the CIR mixture. As CIR continues to evolve, the desire to place CIR mixture with specific engineering properties requires the use of a mix design process. A new mix design procedure was developed for Cold In-place Recycling using foamed asphalt (CIR-foam) in consideration of its predicted field performance. The new laboratory mix design process was validated against various Reclaimed Asphalt Pavement (RAP) materials to determine its consistency over a wide range of RAP materials available throughout Iowa. The performance tests, which include dynamic modulus test, dynamic creep test and raveling test, were conducted to evaluate the consistency of a new CIR-foam mix design process to ensure reliable mixture performance over a wide range of traffic and climate conditions. The "lab designed" CIR will allow the pavement designer to take the properties of the CIR into account when determining the overlay thickness.
Book Synopsis Development of New Mix Design for Cold In-place Recycling Using Foamed Asphalt by : Yongjoo Kim
Download or read book Development of New Mix Design for Cold In-place Recycling Using Foamed Asphalt written by Yongjoo Kim and published by . This book was released on 2007 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: A desire to maintain a safe, efficient, and cost-effective roadway system has led to a significant increase in the demand to rehabilitate the existing pavements. Asphalt pavement recycling has grown dramatically over the last few years as the preferred way to rehabilitate existing asphalt pavements. A number of different techniques has been employed in the rehabilitation of existing asphalt pavements. One of these is Cold Inplace Recycling with foamed asphalt (CIR-foam). However, the current CIR-foam practice utilizes a generic recipe specification without a mix design, where a contractor is given latitude to adjust the proportions of the foamed asphalt content to achieve a specified level of density. Therefore, this study was conducted to develop a consistent laboratory mix design in consideration of its predicted field performance. First, the CIR-foam mix design parameters were identified and a new laboratory mix design procedure of CIR-foam mixture was developed. The developed mix design procedure was then validated using different sources of RAP materials. The simple performance tests, which include a dynamic modulus test, a dynamic creep test and a raveling test, were used to evaluate the consistency of a new CIR-foam mix design process to ensure reliable mixture performance over a wide range of traffic and climatic conditions.
Book Synopsis Bituminous Mixtures and Pavements VI by : A. Nikolaides
Download or read book Bituminous Mixtures and Pavements VI written by A. Nikolaides and published by CRC Press. This book was released on 2015-07-28 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bituminous Mixtures and Pavements contains 113 accepted papers from the 6th International ConferenceBituminous Mixtures and Pavements (6th ICONFBMP, Thessaloniki, Greece, 10-12 June 2015). The 6th ICONFBMP is organized every four years by the Highway Engineering Laboratory of the Aristotle University of Thessaloniki, Greece, in conjunction with
Book Synopsis Sustainability Issues in Civil Engineering by : G.L. Sivakumar Babu
Download or read book Sustainability Issues in Civil Engineering written by G.L. Sivakumar Babu and published by Springer. This book was released on 2016-11-23 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: This compilation on sustainability issues in civil engineering comprises contributions from international experts who have been working in the area of sustainability in civil engineering. Many of the contributions have been presented as keynote lectures at the International Conference on Sustainable Civil Infrastructure (ICSCI) held in Hyderabad, India. The book has been divided into core themes of Sustainable Transportation Systems, Sustainable Geosystems, Sustainable Environmental and Water Resources and Sustainable Structural Systems. Use of sustainability principles in engineering has become an important component of the process of design and in this context, design and analysis approaches in civil engineering are being reexamined to incorporate the principles of sustainable designs and construction in practice. Developing economies are on the threshold of rapid infrastructure growth and there is a need to compile the developments in various branches of civil engineering and highlight the issues. It is this need that prompted the composition of this book. The contents of this book will be useful to students, professionals, and researchers working on sustainability related problems in civil engineering. The book also provides a perspective on sustainability for practicing civil engineers who are not directly researching the problems but are affected by the concerns in the course of their profession. The book can also serve to highlight to policy makers and governing bodies the need to have a mandate for sustainable infrastructural development.
Book Synopsis Manual of Laboratory Mix Design Procedure for Cold In-Place Recycling Using Foamed Asphalt (CIR-foam) by : Hosin "David" Lee
Download or read book Manual of Laboratory Mix Design Procedure for Cold In-Place Recycling Using Foamed Asphalt (CIR-foam) written by Hosin "David" Lee and published by . This book was released on 2007 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective is to determine the optimum percentage of water needed to produce the best foam properties for a given asphalt binder. The optimum water content is determined by achieving the maximum expansion ratio and half-life of the foamed asphalt. Expansion ratio is defined as the maximum volume over its original volume and half-life is defined as the time in seconds for foam to become a half of its maximum volume.
Book Synopsis Examination of Curing Criteria for Cold In-place Recycling by : Hosin Lee
Download or read book Examination of Curing Criteria for Cold In-place Recycling written by Hosin Lee and published by . This book was released on 2009 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: The previous research performed laboratory experiments to measure the impacts of the curing on the indirect tensile strength of both CIR-foam and CIR-emulsion mixtures. However, a fundamental question was raised during the previous research regarding a relationship between the field moisture content and the laboratory moisture content. Therefore, during this research, both temperature and moisture conditions were measured in the field by embedding the sensors at a midpoint and a bottom of the CIR layer. The main objectives of the research are to: (1) measure the moisture levels throughout a CIR layer and (2) develop a moisture loss index to determine the optimum curing time of CIR layer before HMA overlay. To develop a set of moisture loss indices, the moisture contents and temperatures of CIR-foam and CIR-emulsion layers were monitored for five months. Based on the limited field experiment, the following conclusions are derived: The moisture content of the CIR layer can be monitored accurately using the capacitance type moisture sensor. The moisture loss index for CIR layers is a viable tool in determining the optimum timing for an overlay without measuring actual moisture contents. The modulus back-calculated based on the deflection measured by FWD seemed to be in a good agreement with the stiffness measured by geo-gauge. The geo-gauge should be considered for measuring the stiffness of CIR layer that can be used to determine the timing of an overlay. The stiffness of CIR-foam layer increased as a curing time increased and it seemed to be more influenced by a temperature than moisture content. The developed sets of moisture loss indices based on the field measurements will help pavement engineers determine an optimum timing of an overlay without continually measuring moisture conditions in the field using a nuclear gauge.
Book Synopsis Development and Application of Bituminous Materials for Civil Infrastructures by : Hui Yao
Download or read book Development and Application of Bituminous Materials for Civil Infrastructures written by Hui Yao and published by Frontiers Media SA. This book was released on 2021-10-22 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Wirtgen Cold Recycling Manual by : Wirtgen GmbH.
Download or read book Wirtgen Cold Recycling Manual written by Wirtgen GmbH. and published by . This book was released on 2004 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Quantifying Workability, Compactability, and Cohesion Gain of Asphalt Emulsion Cold In-place Recycling by : Sadie Casillas
Download or read book Quantifying Workability, Compactability, and Cohesion Gain of Asphalt Emulsion Cold In-place Recycling written by Sadie Casillas and published by . This book was released on 2020 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: To maximize the life and quality of a pavement, proper maintenance and rehabilitation are essential. Strategies for pavement rehabilitation with many sustainable benefits are pavement recycling. This dissertation focuses on two types of in-situ pavement recycling: Cold in-place recycling (CIR) stabilized with asphalt emulsion and full depth reclamation (FDR) stabilized with asphalt emulsion or foamed asphalt. One white paper (Chapter 2), two accepted peer reviewed journal articles (Chapters 3 and 4), and one submitted peer reviewed journal article (Chapter 5) are presented in this document to create better understanding of the unique material characterization of asphalt emulsion cold recycled materials, along with factors which influence characterization, pertaining to the measurement of workability, compactability, and cohesion gain. In Chapter 2, a detailed review of the progression of mix design procedures for unbound granular materials (UGM), fully bound hot mix asphalt (HMA), and semi-bound asphalt emulsion CIR is presented to establish the current state of mix design for each material type and identify ways the design of asphalt emulsion CIR could become more engineered rather than empirical. Recommendations included development of additional guidance on use of active and inert fillers, a methodology to account for workability and compactability during mix design, curing procedures which more closely mimic conditions in the field to improve cohesion gain, and a procedure for determination of optimum water content. In Chapter 3, a study was conducted to evaluate different laboratory compaction methods for compaction of asphalt emulsion and foamed asphalt FDR. Both the Proctor hammer, typically used for UGM, and the Superpave Gyratory Compactor (SGC), typically used for HMA, were compared by evaluating densities, tensile strengths, and compaction metrics of FDR samples produced using each method. The modified Proctor hammer produced samples with the highest dry unit weights; however, samples produced using the SGC had higher tensile strengths, indicating compaction method affects material properties. Chapter 4 evaluates different test methods and equipment commonly available in asphalt laboratories for ability to quantify workability, compactability, and cohesion gain of asphalt emulsion CIR by measuring differences in performance due to changes in laboratory curing conditions. Cure temperature was found to have a more significant influence on test results than cure time. SGC metrics were recommended for quantifying workability and compactability. The direct shear test showed promise for quantifying cohesion gain. Finally, Chapter 5 measured effects of various sample fabrication factors on measurement of workability, compactability, and cohesion gain in order to address open questions associated with asphalt emulsion CIR laboratory procedures. Curing temperature most significantly influenced workability and compactability; while cohesion gain was more significantly influenced by mixing temperature and specimen test temperature. The direct shear test again showed promise for measuring cohesion gain of asphalt emulsion CIR. Therefore, a draft specification for this test method was prepared and is included as an appendix of this dissertation. A singular test method for quantifying workability and compactability for asphalt emulsion CIR has not yet been identified due to multiple mechanisms at play during mixing and compaction stages for this material.
Book Synopsis Annual Report of Iowa Highway Research Board Research and Development Activities for the Fiscal Year Ending ... by : Iowa. Highway Research Board
Download or read book Annual Report of Iowa Highway Research Board Research and Development Activities for the Fiscal Year Ending ... written by Iowa. Highway Research Board and published by . This book was released on 2005 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Annual Report of Highway Division Highway Research and Development in Iowa for the Fiscal Year Ending June 30 ... by :
Download or read book Annual Report of Highway Division Highway Research and Development in Iowa for the Fiscal Year Ending June 30 ... written by and published by . This book was released on 2000 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Recycled Pavements Using Foamed Asphalt in Minnesota by : Andrew John Eller
Download or read book Recycled Pavements Using Foamed Asphalt in Minnesota written by Andrew John Eller and published by . This book was released on 2009 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt: Foamed asphalt was discovered in Iowa by Csanyi in 1956, and has become a useful road rehabilitation tool when used in conjunction with cold in-place recycle (CIR) and full-depth reclamation (FDR) processes. The advance of pavement recycling and foaming technology has made foamed asphalt a common rehabilitation technique in many parts of the world including Europe, Asia, Africa, Canada, and parts of the United States. Iowa has used the technique extensively and has developed specifications for the construction of foamed asphalt FDR and CIR stabilized roadways. The intention of this research project, Investigation 873, is to develop FDR and CIR foamed asphalt specifications and report data and information that will assist engineers in Minnesota with successfully implementing foamed asphalt recycling techniques. There are already several foamed asphalt CIR projects in Minnesota that have been completed on low volume roads. The roadways were rehabilitated in Fillmore and Olmsted Counties from 2004 to 2008, and are performing quite well to date. The Minnesota Department of Transportation (Mn/DOT) has taken Falling Weight Deflectometer (FWD) and core data from these projects in order to examine the in-situ properties of the stabilized pavement layer, as well as the material properties of the foamed asphalt itself. The FWD data analysis reveals that the recycled pavement layer develops a relatively uniform strength despite the high variability inherent in most low-volume roads. Core data indicates that the foamed asphalt forms a cohesive matrix when mixed with the fines from the reclaimed material, which does not disintegrate when cored. Overall PG grade of the recycled layer changed significantly from the original mix in some cases, but not in others. The cause of this is unknown, however, differences in the procedures used and materials present at the different projects may help explain this. It is recommended that FWD, ground penetrating radar (GPR), and core analysis be performed before and after foamed asphalt projects to more accurately define these differences.
Book Synopsis Micromechanics for Foamed Asphalt Stabilized Materials by : Pengcheng Fu
Download or read book Micromechanics for Foamed Asphalt Stabilized Materials written by Pengcheng Fu and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Full depth reclamation (FDR) of damaged flexible pavements with foamed asphalt stabilization is a promising pavement rehabilitation strategy. It offers a rapid construction process, potentially low life cycle cost, and minimal negative environmental impact. However, as it is a relatively new technology, it carries a significant risk of providing poor results because of insufficient engineering and research experience. Owing to the intrinsic complexities in behaviors of this material, conventional research approaches involving large factorial laboratory experiments are not efficient and the conclusions from such studies are often not reliable. This doctoral study employed a micromechanical research framework to investigate behavior of foamed asphalt stabilized materials used in FDR. A Fracture Face Image Analysis (FFIA) technique was developed to quantify the asphalt mastic distribution in foamed asphalt mixes, which is one of the most important microstructural characteristics of this material. A number of important aspects of foamed asphalt mix behaviors, including strength, stiffness, curing and mixing were investigated in this framework and documented in this thesis. The study of strength behavior examined the roles of the individual phases in foamed asphalt mixes in determining strength behavior. The microstructural mechanisms of a number of design and construction variables' effects were identified. The study of stiffness focused on comparing stiffnesses of soaked and unsoaked foamed asphalt mixes measured with a number of different laboratory test methods. The conclusions highlighted the importance of simulating realistic field stress states in laboratory tests for material evaluation. The curing mechanism study found that the development of bonding strength provided by the asphalt mastic is largely dependent on evaporation of mixing/compaction water. Important recommendations to engineering practice include allowing the initial water to evaporate, ensuring adequate drainage, and using active fillers to accelerate early strength development. Standard curing procedures for material evaluation were proposed. This research also, for the first time, discovered that the mixing moisture content in a loose moist granular material determines the agglomeration states of aggregate particles, and thereby affects the foamed asphalt distribution patterns in the mix. Additionally, recommendations are proposed to improve design and construction of FDR-foamed asphalt projects based on these findings.
Author :Iowa. Department of Transportation. Bureau of Research and Technology Publisher : ISBN 13 : Total Pages :164 pages Book Rating :4.:/5 (318 download)
Book Synopsis Annual Report by : Iowa. Department of Transportation. Bureau of Research and Technology
Download or read book Annual Report written by Iowa. Department of Transportation. Bureau of Research and Technology and published by . This book was released on 2005 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Mix Design Practices for Warm Mix Asphalt by : Ramon Francis Bonaquist
Download or read book Mix Design Practices for Warm Mix Asphalt written by Ramon Francis Bonaquist and published by Transportation Research Board. This book was released on 2011 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB's National Cooperative Highway Research Program (NCHRP) Report 691: Mix Design Practices for Warm-Mix Asphalt explores a mix design method tailored to the unique material properties of warm mix asphalt technologies. Warm mix asphalt (WMA) refers to asphalt concrete mixtures that are produced at temperatures approximately 50°F (28°C) or more cooler than typically used in the production of hot mix asphalt (HMA). The goal of WMA is to produce mixtures with similar strength, durability, and performance characteristics as HMA using substantially reduced production temperatures. There are important environmental and health benefits associated with reduced production temperatures including lower greenhouse gas emissions, lower fuel consumption, and reduced exposure of workers to asphalt fumes. Lower production temperatures can also potentially improve pavement performance by reducing binder aging, providing added time for mixture compaction, and allowing improved compaction during cold weather paving. Appendices to NCHRP Report 691 include the following. Appendices A, B, and D are included in the printed and PDF version of the report. Appendices C and E are available only online.
Book Synopsis Innovative Materials for Construction by : Mariaenrica Frigione
Download or read book Innovative Materials for Construction written by Mariaenrica Frigione and published by MDPI. This book was released on 2021-05-05 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most of the typical materials employed in today’s constructions present limitations, especially concerning their durability, in either common or severe environmental conditions, and their impact on the environment. In response to these issues, academic and industrial efforts around the world have been devoted to developing new smart materials that can provide efficient alternatives, improve the energy efficiency of buildings, or can upgrade, repair, or protect existing infrastructures. Different and wide technological innovations are, therefore, quickly fostering advancements in the field of construction materials. A new generation of materials (bricks, cement, coatings, concrete, FRP, glass, masonry, mortars, nano-materials, PCM, polymers, steel, wood, etc.) is gaining a prominent position in modern building technology, since they can overcome various limits and flaws of conventional materials employed in constructions, without neglecting the smart applications of pioneering materials in ancient constructions and historic buildings. Even though the adoption of innovative materials in the construction field has been a successful route in achieving enhanced performance, or even new and unexpected characteristics, some issues have not been completely solved. On top of them, the cost/performance ratio of novel solutions, since their introduction must be convenient, without compromising quality. Other concerns are related to their sustainability, with eco-friendly options, possibly exploiting recycled materials or by-products from other productions, being the most desirable solution. Finally, the use of materials or systems that are unconventional in this field raises the need to update or develop new specifications and standards. This special issue aims at providing a platform for discussing open issues, challenges, and achievements related to innovative materials proposed for the construction industry.
