Download or read book Field Implementation of Rubberized Chip Seal written by Ahmed Gheni and published by . This book was released on 2018 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chip seals have been widely used as a pavement maintenance surface treatment due to its competitive cost and construction time. Recently, the research team developed a rubberized chip seal where natural aggregate is replaced with crumb rubber obtained from recycled tires. During this study, a total of 108 laboratory specimens and a field chip seal section with different crumb rubber replacement ratios were investigated. Aggregate macrostructure, retention, and skid resistance were measured. The crumb rubber showed a remarkable performance in aggregate retention measured using the Vialit and Pennsylvania tests. The values of the mean texture depth of rubberized chip seal specimens were significantly higher than those of the conventional chip seal. Finally, while a reduction in the British Pendulum Number (BPN) was recorded with an increase in the crumb rubber replacement ratio immediately after construction, after a period of more than a year of service life in the experimental section road, the rubberized chip seal segments recorded a much higher BPN compared to that of the conventional chip seal segment. Furthermore, it is recommended also to increase the curing time for chip seal, regardless of aggregate type, to at least six hours to improve the performance of the chip seal.
Download or read book Chip Seal Best Practices written by Douglas D. Gransberg and published by Transportation Research Board. This book was released on 2005 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 342: Chip Seal Best Practices examines ways to assist in the development and implementation of pavement preservation programs by identifying the benefits of using chip seal as part of a preventive maintenance program and by highlighting advanced chip seal programs in use around the world. The report includes approximately 40 best practices in the areas of chip seal design methods, contract administration, equipment practices, construction practices, and performance measures. According to the report, the increased use of chip seals for maintenance can be a successful, cost-effective way of using preventive maintenance to preserve both low-volume and higher-volume pavements.
Download or read book Manual for Emulsion based Chip Seals for Pavement Preservation written by Scott Shuler 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 680: Manual for Emulsion-Based Chip Seals for Pavement Preservation examines factors affecting chip performance, highlights design and construction considerations, and explores procedures for selecting the appropriate chip seal materials. The report also contains suggested test methods for use in the design and quality control of chip seals. Appendices A to J of NCHRP Report 680 provide further elaboration on the work performed in this project--
Download or read book Proceedings of the 4th Congr s International de G otechnique Ouvrages Structures written by Hoang-Hung Tran-Nguyen and published by Springer. This book was released on 2017-10-20 with total page 1181 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings volume for the 4th international conference CIGOS 2017 (Congrès International de Géotechnique - Ouvrages - Structures) presents novel technologies, solutions and research advances, making it an excellent guide in civil engineering for researchers, students, and professional engineers alike. Since 2010, CIGOS has become a vital forum for international scientific exchange on civil engineering. It aims to promote beneficial economic partnerships and technology exchanges between enterprises, worldwide institutions and universities. Following the success of the last three CIGOS conferences (2010, 2013 and 2015), the 4th conference was held at Ho Chi Minh City University of Technology, Ho Chi Minh City (Saigon), Vietnam on 26 to 27 October 2017. The main scientific themes of CIGOS 2017 were focused on ‘New Challenges in Civil Engineering’.
Download or read book Toward Statewide Implementation of the Surface Performance Graded Specification for Chip Seal Binders written by Shi Chang and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past 15 years, a surface performance-graded (SPG) specification for chip seal binders was developed by the Texas Department of Transportation (TxDOT) using laboratory measurements and visual field performance (aggregate loss and bleeding) of 75 highway sections (HSs). The SPG was established in an effort to extend the service life of chip seals by providing a binder selection method that accounts for differences in climate. TxDOT recently commenced a statewide implementation effort of the SPG specification. The initial activities include (a) reviewing laboratory and field performance of HSs built in 2011 based on the latest version of the SPG specification, newly generated SPG requirement map, and revised surface condition index calculation; (b) characterizing binders from HSs built in 2013 and monitoring their field performance; (c) proposing additional parameters to complement the SPG specification; and (d) predicting bending beam rheometer (BBR) creep stiffness values from frequency sweep results. When comparing the expected performance of the binders (based on their SPG grade) against actual field performance after the first year in service, 80 percent of the HSs built in 2011 correlated well. Individual SPG properties were compared to corresponding field performance for 2013 chip seal binders in terms of aggregate loss or bleeding. Unexpected field performance from the Amarillo District largely contributed to poor correlation between the BBR creep stiffness properties and field performance in terms of aggregate loss for 2013 HSs. A phase angle parameter was introduced in the SPG specification to ensure modified binders contain sufficient polymers. The prediction of BBR creep stiffness values via a frequency sweep test was not reliable at colder temperatures, even when a 4-mm dynamic shear rheometer plate test was used. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/155717
Download or read book Delamination Surveys and Removal Procedures for Rubberized Asphalt Chip Seal RACS Bridge Deck Overlays written by and published by . This book was released on 1998 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Uses of Recycled Rubber Tires in Highways written by Jon A. Epps and published by Transportation Research Board. This book was released on 1994 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: This synthesis on the use of recycled rubber tires in highways will be of interest to administrators and policy-makers; pavement, materials, geotechnical, environmental, and traffic operations engineers; and research engineers involved with highway design and construction issues. Information is provided on the uses of rubber tires in asphalt paving materials as well as other uses, such as on fills and embankments, for erosion control and on railroad grade crossings. Specifically, information is included which identifies the agencies using or implementing applications for recycled rubber tires and defines the design parameters, technical and construction limitations, performance, costs, benefits, environmental limitations, specifications, and availability. This synthesis of information defines the use of recycled rubber tires in highways and is based on a review of nearly 500 references and on information recorded from state highway agency responses to a 1991 survey of practice. Updates are included for as much of the state practice information possible through 1993. The use of scrap tires for highway applications is dynamic with regard to policy and technical issues. Therefore, the reader should keep in mind that the information presented reflects the best available data at a particular time. The synthesis also identifies current research in the topic area, critical research needs, and legislative issues that affect application and use of recycled rubber tires.
Download or read book Quantifying Asphalt Emulsion Based Chip Seal Curing Times Using Electrical Resistance Measurements written by Miguel Montoya and published by . This book was released on 2017-09-15 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Chip sealing typically consists of covering a pavement surface with asphalt emulsion into which aggregate chips are embedded. The asphalt emulsion cures through the evaporation of water, thus providing mechanical strength to adhere to the pavement while keeping the aggregate chips in place. The curing time for the chip seal depends on many factors, such as the asphalt emulsion and aggregate types, aggregate moisture content, emulsion and aggregate application rates, and environmental conditions (e.g., temperature, wind speed, relative humidity, and solar radiation). Currently, no field technique is available to quantify when sufficient mechanical strength has developed in the binder to allow traffic on a newly sealed roadway or to remove the surplus aggregate from a fresh chip seal through brooming. Instead such decisions are made by empirical factors that rely on the experience of field personnel.This study investigated the use of electrical resistance measurements to develop a quantitative method for determining the optimum curing time for chip seals. First, full frequency, two-point, uniaxial electrical impedance spectroscopy was used to characterize the electrical properties of asphalt emulsions and various asphalt emulsion-aggregate combinations. The laboratory test results suggest a relationship between the changes in the electrical resistance of an asphalt emulsion and the amount of curing that has occurred in the system. Additionally, standardized mechanical strength tests and full-scale field trials were conducted using a variety of materials. The electrical properties of the fresh seals were quantified using a handheld electrical device with a two-point probe to measure resistance. The findings suggest that chip seal systems gain significant mechanical strength when the initial electrical resistance measurement increases by a factor of 10. Finally, the implementation of the methodology for five full-scale chip seal projects in Indiana indicates that curing times for the chip seals range from 3.5 to 4.0 hours.
Download or read book Chip Sealing in New Zealand written by and published by . This book was released on 2005-01-01 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microsurfacing written by Douglas D. Gransberg and published by Transportation Research Board. This book was released on 2010 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 411: Microsurfacing explores highway microsurfacing project selection, design, contracting, equipment, construction, and performance measurement processes used by transportation agencies in the United States and Canada. Microsurfacing is a polymer-modified cold-mix surface treatment that has the potential to address a broad range of problems on today's highways --
Download or read book Gravel Roads written by Ken Skorseth and published by . This book was released on 2000 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this manual is to provide clear and helpful information for maintaining gravel roads. Very little technical help is available to small agencies that are responsible for managing these roads. Gravel road maintenance has traditionally been "more of an art than a science" and very few formal standards exist. This manual contains guidelines to help answer the questions that arise concerning gravel road maintenance such as: What is enough surface crown? What is too much? What causes corrugation? The information is as nontechnical as possible without sacrificing clear guidelines and instructions on how to do the job right.
Download or read book A Basic Asphalt Emulsion Manual written by Asphalt Institute and published by . This book was released on 1979 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optimal Timing of Pavement Preventive Maintenance Treatment Applications written by David G. Peshkin and published by Transportation Research Board. This book was released on 2004 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: "TRB's National Cooperative Highway Research Program (NCHRP) Report 523: Optimal Timing of Pavement Preventive Maintenance Treatment Applications describes a methodology for determining the optimal timing for the application of preventive maintenance treatments to flexible and rigid pavements. NCHRP Report 523 also presents the methodology in the form of a macro-driven Microsoft Excel Visual Basic Application--designated OPTime"--Publisher's description.
Download or read book Squeegee Seal and Crumb Rubber Chip Seal Sapinero East written by Robert F. LaForce and published by . This book was released on 1983 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Implementation Phase of SPR 777 Study and Guidance for a Chip Seal Performance Specification written by Ashley Buss and published by . This book was released on 2021 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tire Waste and Recycling written by Trevor Letcher and published by Academic Press. This book was released on 2021-03-25 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tire Waste and Recycling takes a methodical approach to the recycling of tires, providing a detailed understanding on how to manage, process, and turn waste tires into valuable materials and industrial applications. Sections cover fundamental aspects such as tire use, composition, trends, legislation, the current global situation, the possibilities for moving towards a circular economy, lifecycle options, treatment methods, and opportunities for re-use, recycling and recovery. Subsequent sections of the book focus on specific technologies that enable the utilization of waste tires in the development of high value materials and advanced applications. Finally, the future of tire recycling is considered. This is an essential resource for scientists, R&D professionals, engineers and manufacturers working in the tire, rubber, waste, recycling, automotive and aerospace industries. In academia, the book will be of interest to researchers and advanced scientists across rubber science, polymer science, materials engineering, environmental science, chemistry and chemical engineering. - Offers systematic coverage of tire recycling, covering composition, lifecycle, processing options, material developments and latest technologies - Explains end-of-life-options in detail, considering approaches and methods for reduction, re-use, recycling and recovery - Explores key application and product areas for recycled tire materials, from civil engineering, sports and leisure, to roads and transport, construction, automotive, and many more
Download or read book Guide for Pavement Friction written by and published by AASHTO. This book was released on 2008 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report contains guidelines and recommendations for managing and designing for friction on highway pavements. The contents of this report will be of interest to highway materials, construction, pavement management, safety, design, and research engineers, as well as others concerned with the friction and related surface characteristics of highway pavements.
