Laboratory Tests on High-friction Surfaces for Highways PDF Download

Author: J. C. Nicholls
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 36

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Author: J.C. Nicholls
Publisher: Thomas Telford
ISBN: 9780727727947
Category : Motor vehicles
Languages : en
Pages : 48

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Book Description
- Executive summary - Abstract - Introduction - Test Methods - Test programme - Conclusion - Acknowledgements - References - Appendix A: Requirements for Asphalt slabs - Appendix B: Requirements for Concrete slabs - Appendix C: Procedure for applying High-friction surfaces and the measurement of the surfacing thickness - Appendix D: Test procedure for determination of texture depth - Appendix E: Test procedure for determination of skid resistance value - Appendix F: Test procedure for determination of the degree of erosion and visual observations - Appendix G: Test procedure for scuffing - Appendix H: Test procedure for wear - Appendix J: Test procedure for tensile adhesion - Appendix K: Procedure for heat-ageing conditioning - Appendix L: Procedure of freeze-thaw conditioning - Appendix M: Procedure for diesel susceptibility conditioning - Appendix N: Test procedure for determination of thermal movement - Appendix P: Test procedure for optional tests - Appendix Q: Test procedure for determination of resistance to peeling - Appendix R: Procedure for visual assessment of trial sites

Author: J. C. Nicholls
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: J.C. Nicholls
Publisher: Thomas Telford
ISBN: 9780727728050
Category : Pavements
Languages : en
Pages : 32

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Book Description
High-friction surface systems are used to support the DETR`s skidding standard on high stress sites. Until recently an epoxy resin was used as a binder to obtain the necessary skid resistance, but with increased demand for high-friction surface systems, alternative systems have come onto the market using different resins as binders. This report describes a series of road trials, set up to compare the performance of a range of resin systems (epoxy-resin, polyurethane-resin, acrylic-resin and rosin-ester). Systems are ranked in terms of maintained skid resistance, texture depth and longevity. Consideration of the different laying techniques employed for different resins indicates that the choice of resin type may be influenced by constraints imposed while laying as well as the performance requirements in service. The results from a series of laboratory tests which have been devised to simulate accelerated wear under trafficking support the road trial conclusions. The results have been used to develop performance-related criteria for a Highway Authorities Product Approval Scheme (HAPAS) certification procedure which can be used to assess existing systems and systems that may be developed in future.

Author:
Publisher: AASHTO
ISBN: 1560514280
Category : Pavements
Languages : en
Pages : 87

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Book Description
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.

Author: J Cliff Nicholls
Publisher: CRC Press
ISBN: 9780419231103
Category : Architecture
Languages : en
Pages : 662

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Book Description
Asphalt Surfacings has been written as a reference to the various asphalt course materials and surfacing treatments that are currently available to engineers, enabling them to select the materials and/or treatment that are appropriate for use on specific sites. Appropriate reference is made to the lower structural layers as the properties of all layers interact in producing the required pavement. The current established position in the UK and the emerging developments throughout the UK and Europe are covered. The contributors are all acknowledged authorities on their particular topics selected from every part of the highway engineering industry to achieve a balance between the various approaches required by the different functions they perform.

Author: S. H. Dahir
Publisher: Transportation Research Board
ISBN: 9780309049047
Category : Technology & Engineering
Languages : en
Pages : 68

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This synthesis will be of interest to pavement engineers, safety officers, and others interested in wet-pavement safety programs. Information is provided on the programs used by a number of agencies in gathering data and correcting areas of potential wet-weather accidents. Wet-pavement accidents continue to be of concern to highway agencies. This report of the Transportation Research Board summarizes agencies' programs in areas such as accident reporting, vehicle testing, friction testing, corrective actions for problem areas, and tort liability and gives some general guidelines for the content of a wet-pavement safety program.

Author: David A. Meggers
Publisher:
ISBN:
Category :
Languages : en
Pages : 11

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Book Description
In 2009, the Kansas Department of Transportation entered into an agreement with the Federal Highway Administration to fulfill the requirements of the High Friction Surface Materials Enhancing Safety at Horizontal Curves on the National Highway System project. Four locations were chosen in Kansas, two on existing asphalt pavement and two on concrete pavement. The applications on asphalt were on highway segments and the concrete segments were medium to high volume ramps at two separate interchanges. Traffic volumes ranged from approximately 1,000 vehicles per day to 25,000 vehicles per day. In general, the surfaces are performing poorly; one of the lower trafficked surfaces, an asphalt application, failed in less than three years. The surfaces on the two applications on concrete are peeling off and skid resistance numbers are dropping. In late 2013 and early 2014, the surfaces were evaluated and several tests were performed to determine quality of the product with less than desirable results. Tests performed included bond testing of the High Friction Surface (HFS), rapid chloride permeability testing of the pavements with and without the HFS, and skid resistance testing. The skid resistance values were compared to skid testing that was performed immediately before placement, immediately after placement, and intermediate skid testing. Results of the testing were mixed; bond was generally poor and skid resistance was dropping rapidly. The results of the review have led to a rewrite of the application specification with an improvement in the surface preparation.

Author: J.C. Nicholls
Publisher: Thomas Telford
ISBN: 9780727728043
Category : Asphalt cement
Languages : en
Pages : 40

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Book Description
- Executive Summary - Introduction - Specification - Trial sites - Compliance testing and analysis - Monitoring - Conclusions - Acknowledgements - References - Appendix A: Summary of results from compliance test - Appendix B: Results from survey by high speed survey vehicle - Abstract - Related publications

Author: Shuo Li
Publisher:
ISBN: 9781622604784
Category :
Languages : en
Pages :

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Book Description
This study aimed to evaluate the long term performance of the selected surface friction treatments, including high friction surface treatment (HFST) using calcined bauxite and steel slag, and conventional friction surfacing, in particular pavement preservation treatments such as chip seal, microsurfacing, ultrathin bonded wearing course (UBWC), and diamond grinding. This study also attempted to determine the correlation between vehicle crash and pavement surface friction, which makes it possible to quantitatively establish the so-called crash modification factors (CMFs) that are extremely useful in selecting a cost-effective solution to reduce wet pavement vehicle crashes.In-depth reviews were conducted to identify the aspects of the properties for aggregates used in HFST, including aggregate abrasion value (AAV), Los Angeles abrasion (LAA), Micro-Deval abrasion, and polished stone value (PSV). Extensive laboratory testing was conducted to examine the LAA, Micro-Deval abrasion, and PSV, and to provide first-hand data on the calcined bauxite and steel slag that may be used for HFST and friction surfacing in Indiana. Laboratory accelerating polishing was carried out to evaluate the effect of aggregate gradation and identify the HFST systems with satisfactory friction performance with respect to surface macro-texture and friction. Test strips were installed in the pavement on a real-world road to further evaluate the friction performances of the promising HFST systems under the true traffic polishing and assess the potential effect of winter and snow plow. Pull-off testing was also conducted to examine the bonding between the proposed HFST systems and the substrate surface. Field friction test data was utilized to evaluate the long-term friction performances of pavement preservation treatments, including chip seal, microsurfacing, UBWC, and diamond grinding. Statewide vehicle crash data between 2010 and 2014 was examined to determine the crash statistics associated with pavement friction. The crash data was also matched to the annual pavement inventory friction data to quantify the probabilistic association between vehicle crash and pavement friction with respect to interstate, US, and state highways, respectively.