Download or read book Seal Coat Binder Performance Specifications written by Amy Epps Martin and published by . This book was released on 2015 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Statewide Implementation of the Surface Performance graded SPG Specification for Seal Coat Binders in Service Products P1 P4 P5 written by and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project includes three documents. (1) Seal Coat Binder Performance Specifications, 87th Annual Transportation Short Course, October 2013, 3p., PowerPoint slides covering objective, history, recommended Surface Performance Grading (SPG) specification, and implementation project. (2) SPG Specification for 2015 Implementation, 8p. (3) Texas Seal Coat Binder Utilization maps for 2013 and 2014, 4p.
Download or read book Performance based Asphalt Binder Specifications for Use in Seal Coats written by Chayatan Phromsorn and published by . This book was released on 1998 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of the Texas Tier System for Seal Coat Binder Specification written by David E. Newcomb and published by . This book was released on 2013 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seal Coat Binder Rate Adjustments Using LiDAR Data written by Darlene C. Goehl and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Texas continues to see the same recurring problems in seal coat construction, such as rock loss, flushing, and bleeding. Because of a loss of experienced inspectors and a shift in inspection forces, an increased risk to the Texas Department of Transportation (TxDOT) exists when making the appropriate field adjustments for construction. Better methods to identify changing pavement conditions and subsequently adjust construction binder rates have become available through the recently completed research project 0-6963 by using mobile light detecting and ranging (LiDAR) reflectivity data. In this study, researchers worked with the Bryan District on six 2019 and five 2020 seal coat projects, and with the Brownwood and Waco Districts on five projects in each district's 2020 summer seal coat contract using LiDAR equipment. The evaluation included applying the algorithm to provide the district with suggested shot rates. Researchers applied the algorithm to the LiDAR data and recommended binder rate adjustments. Researchers analyzed actual shot rates and compared those rates to the predicted rates. According to the generated results, researchers recommend determining the starting rate from the design procedure developed in TxDOT research project 0-6989 and determining the binder rate adjustments from LiDAR data analysis. This procedure can help field engineers make real-time decisions and can lead to better seal coat performance.
Download or read book A Surface Performance graded SPG Specification for Surface Treatment Binders written by Lubinda F. Walubita and published by . This book was released on 2005 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presently, surface treatment design and material selection is based on traditional specifications and experience, which are not performance-based and sometimes result in inadequate performance of the surface treatment. In 2000 the first phase of a Texas Department of Transportation (TxDOT) research project developed a surface performance-graded (SPG) specification for the selection of surface treatment binders (Research Report 1710-1). The SPG specification is performance-based and utilizes binder properties directly related to surface treatment performance and associated distress. The specification takes into account environmental conditions, aging effects of the binder, visco-elastic behavior, and reliability. The objective of this second phase of the project was to investigate and establish the validity and applicability of the proposed SPG specification, make modifications where necessary, and, finally, recommend the SPG specification for practical implementation. The research methodology involved highway section identification, laboratory testing including SPG grading, performance monitoring, and comparison of the SPG binder grades to actual field performance. Factors included in the experimental design were binder type and suppliers, environment, aggregates, and traffic. Analyses of the results showed that there is generally a good correlation between the proposed SPG specification and actual field performance. Overall, the results are indicative that the SPG specification is functional and if properly applied, the specification promises to be a relatively cost-effective method for selecting binders to ensure adequate surface treatment performance. However, further validation is recommended, possibly with controlled test sections to fully investigate the effects of design, construction, and quality control processes and address some of the deficiencies of the specification.
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 The Effects of Emulsion Variability on Seal Coats written by J. F. Shook and published by . This book was released on 1990 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Re refined Engine Oil Bottom written by Pravat Karki and published by . This book was released on 2019 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many state departments of transportation have adopted the Superpave PG specification since the completion of the Strategic Highway Research Program in 1993. A much wider range of crude oil sources and binder modification techniques are being used now to produce asphalt binders. Although asphalt binders used these days still meet the requirements of the PG specification, many premature failures have been reported by many states. Texas Department of Transportation (TxDOT) initiated a study on re-refined engine oil bottom (REOB) in 2015. The objectives of this study were to establish REOB detection methods and recommend maximum allowable amount of REOB in asphalt binders and seal coat binders. Based on existing literatures, researchers developed and verified scientific methods to detect and quantify the amount of REOB in both asphalt binders and seal coat binders using a handheld or a benchtop X-Ray Fluorescence (XRF) instrument. Furthermore, a comprehensive study was performed to define the impact of REOB on asphalt binders, asphalt mixtures, and seal coat performance. Multiple sources of binders, aggregates, and REOB (including recycled binders, PPA, and GTR) were used in the evaluation. Laboratory test results clearly indicated that the addition of REOB has detrimental effects on rutting, cracking, and seal coat adhesion properties. Not only should the current upper limit of 5 percent REOB in asphalt binders be kept, but an upper limit of 5 percent REOB in seal coat binders needs to be established. The implementation of these XRF tools and recommendations on the upper limits of REOB in binders will make pavements last longer as intended.
Download or read book Rejuvenators Rejuvenator Sealers and Seal Coats for Airfield Pavements written by and published by . This book was released on 2003 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: There are a number of proprietary rejuvenator, rejuvenator/sealer, and a seal coat materials currently available. It should be noted that throughout this report file term rejuvenator will be used to describe both rejuvenator and rejuvenator/sealer materials, because the primary purpose in this study was to use these materials to rejuvenate the asphalt pavement. Because of the proprietary nature of these materials, specifications that use performance-based requirements rather than material requirement specifications are highly preferred. One important requirement in the development of this type of specification is a field performance comparison of the various materials with known application and material property parameters. The objective of this study was to investigate the comparative field performance of various rejuvenators and seal coat materials. The field performance of these materials was evaluated over a period of more than 1 year. The materials evaluated in this study were proprietary products. The study was not intended to determine the best or optimum rejuvenator or seal coat material but was intended to provide information for the development or updating of guide specifications for file use of these types of materials. The scope of this study was to evaluate several types of coal-tar- and petroleum-based rejuvenators and seal coat materials. The materials were placed at two airfields and their effect on the binder properties of the treated pavement was compared to untreated areas. The field performance of the rejuvenator and seal coat materials was evaluated through their effects on skid resistance, texture, and changes on visual appearance. This report covers the placement and performance of the materials included in this study.
Download or read book Statewide Implementation of the Surface Performance Graded SPG Specification for Chip Seal Binders in Service written by Amy Epps Martin and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past almost 20 years, a Surface Performance-Graded (SPG) specification for chip seal binders was developed and validated using laboratory measurements and visual field performance of 141 highway sections. This SPG specification was established in an effort to extend the service life of chip seals and save approximately $9 million per year by providing a binder grading system and associated selection guidelines that: (1) accounts for differences in climate and (2) uses existing equipment and performance-based properties that preclude bleeding and aggregate loss in the critical first year of service after construction. This report documents a multi-year implementation effort that includes: (1) further validation and (2) industry interaction including outreach, state round robin testing programs, laboratory characterization efforts with private laboratories, and associated work with a national task force. The SPG specification now available as a special provision to Texas Department of Transportation (TxDOT) Item 300 (SP 300-011) will replace the TxDOT Chip Seal Binder Material Selection Table with the tiered system and conventional chip seal binder specifications for materials in service provided in TxDOT Item 300.
Download or read book Limit Analysis and Soil Plasticity written by Wai-Fah Chen and published by Elsevier. This book was released on 2013-07-10 with total page 653 pages. Available in PDF, EPUB and Kindle. Book excerpt: Developments in Geotechnical Engineering, Volume 7: Limit Analysis and Soil Plasticity covers the theory and applications of limit analysis as applied to soil mechanics. Organized into 12 chapters, the book presents an introduction to the modern development of theory of soil plasticity and includes rock-like material. The first four chapters of the book describe the technique of limit analysis, beginning with the historical review of the subject and the assumptions on which it is based, and then covering various aspects of available techniques of limit analysis. The subsequent chapters deal with the applications of limit analysis to what may be termed "classical soil mechanics problems that include bearing capacity of footings, lateral earth pressure problems, and stability of slopes. In many cases, comparisons of limit analysis solution and conventional limit equilibrium and slip-like solutions are also presented. Other chapters deal with the advances in bearing-capacity problem of concrete blocks or rock and present theoretical and experimental results of various concrete bearing problems. The concluding chapter examines elastic-plastic soil and elastic-plastic-fracture models for concrete materials. This book is an ideal resource text to geotechnical engineers and soil mechanics researchers.
Download or read book Low Temperature Performance of Seal Coat written by Hyungjun Ahn and published by . This book was released on 2014 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study presents the evaluation of low-temperature performance of seal coat in terms of friction performance and aggregate-loss performance. In addition, factors affecting the seal-coat performance at low temperature were also investigated. Ten seal coats on U.S. highways and State Roads in Indiana were selected and the friction tests were conducted in spring and fall for approximately 4 to 6 years after the construction. Three emulsions and seven aggregates consisting of CRS-2 P, RS-2 P, and AE-90 S for emulsions and trap rock, sandstone, blast furnace slag, steel slag, limestone, dolomite, and crushed gravel were used for the Vialit test for aggregate-loss performance, the zeta potential test for the effect of electrostatic property, and the bending beam rheometer (BBR) test and thermomechanical analysis (TMA) test for the effect of mechanical and thermo-properties of emulsion. Friction numbers on ten seal coats constructed in Indiana from 2007 and 2013 showed that the winter season has a more significant impact on the friction reduction than the impact the summer season has. The Vialit test result showed that an increase in aggregate loss occurred as the temperature decreased, regardless of aggregate-emulsion combinations. The low-temperature aggregate loss is more sensitive to the emulsion type than to the aggregate type. The higher zeta potential of emulsion resulted in better aggregate-loss performance at low temperatures below -17°C. However, the effect of electrostatic interaction between the aggregate and emulsion particles on aggregate-loss performance was found to be statistically insignificant. The emulsion with a softer binder (lower stiffness) performed better than the emulsion containing a stiffer binder in terms of aggregate-loss performance at low temperatures. Last, the coefficients of thermal expansion of emulsion residues were not an influence on factors affecting the low-temperature aggregate-loss performance using the three emulsion types.
Download or read book Performance Characteristics of Open graded Friction Courses written by Harry A. Smith and published by Transportation Research Board. This book was released on 1992 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: This synthesis will be of interest to construction, maintenance, pavement design, and materials engineers, pavement contractors, and others interested in the use of open-graded friction courses (OGFC) as an asphalt concrete pavement wearing surface. Information is provided on performance benefits and limitations of OGFC, material and mixture properties, and current construction practices in use in the United States and Europe. Advances in mixture design and construction techniques have overcome several of the performance limitations identified in early applications of OGFC, as well as enhanced the performance benefits associated with OGFC use. This report of the Transportation Research Board describes the current state of the practice with respect to the use of OGFC. Experience with the design, construction, and performance of OGFC is summarized, based on a review of the literature, documentation of experience from applications in the U.S. and Europe, and site visits to several states.
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 A New Testing Protocol for Seal Coat chip Seal Aggregate binder Compatibility written by Baris Yazgan and published by . This book was released on 2003 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:
