A Method For Rating The Skid Resistance And Micro Macrotexture Characteristics Of Wet Pavements
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A Method For Rating The Skid Resistance And Micro Macrotexture Characteristics Of Wet Pavements
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Author : F. Buhlmann
language : en
Publisher:
Release Date : 1983
A Method For Rating The Skid Resistance And Micro Macrotexture Characteristics Of Wet Pavements written by F. Buhlmann and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with Automobiles categories.
A method is developed from combined viscous-dynamic hydroplaning theory to rate the skid resistance of wet pavements in terms of pavement microtexture and macrotexture drainage coefficients derived from full-scale tire-pavement friction tests. The friction tests can be conducted using any of the conventional tire test operating modes such as braked rolling, yawed rolling, or locked-wheel sliding. Once the drainage coefficients have been established for a wet pavement surface by friction test in a particular tire operating mode, the method can be used to predict friction coefficients on the wet pavement surface for the other tire operating modes, as well as friction coefficients for different-size tires and inflation pressure conditions. The procedure for using the method is described and examples are given. The method is used to evaluate the skid resistance, microtexture, and macrotexture characteristics of 83 highway pavements in Switzerland which were tested by The Institute of Technology (ISETH) using a skiddometer (locked-wheel test mode) over a 40 to 100-km/h speed range. The results obtained are compared with British pendulum, sand patch, and outflow meter tests of pavement surface texture also performed by ISETH on the same 83 highway pavements. Comparison with experimental data shows that the method gives reasonable estimates of friction coefficient for both aircraft and automobile tires for the examples cited.
Frictional Interaction Of Tire And Pavement
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Author : W. E. Meyer
language : en
Publisher: ASTM International
Release Date : 1983
Frictional Interaction Of Tire And Pavement written by W. E. Meyer and has been published by ASTM International this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with Friction categories.
Guide For Pavement Friction
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Author :
language : en
Publisher: AASHTO
Release Date : 2008
Guide For Pavement Friction written by and has been published by AASHTO this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Pavements categories.
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.
The Tire Pavement Interface
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Author : Marion G. Pottinger
language : en
Publisher: ASTM International
Release Date : 1986
The Tire Pavement Interface written by Marion G. Pottinger and has been published by ASTM International this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with Automobiles categories.
Development Of Prediction Models For Skid Resistance Of Asphalt Pavements
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Author : Sand Aldagari
language : en
Publisher:
Release Date : 2017
Development Of Prediction Models For Skid Resistance Of Asphalt Pavements written by Sand Aldagari and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with Pavements, Asphalt categories.
Pavement skid resistance is one of the primary factors in highway safety. Pavements with adequate skid resistance reduce the number of crashes in wet conditions. The friction between pavement surface and vehicle tires is related to the macrotexture and microtexture of pavement surface. The macrotexture of asphalt pavement is dependent on aggregate gradation, while the microtexture is dependent on aggregate shape characteristics. Aggregates with angular shape and rough texture provide higher level of skid resistance compared to aggregates with smooth surface. In addition, pavement surfaces with high macrotexture provide higher skid resistance compared to those with low macrotexture. There were two main objectives of this study. The first object was to investigate and examine the surface and friction characteristics of various test sections of asphalt mixtures as well as seal coat surfaces. The test sections included different asphalt mixture types (e.g., dense graded, stone matrix asphalt, porous friction course), seal coat grades (Grade 1, Grade 2, and Grade 3), aggregate types (e.g., limestone, gravel, granite, sandstone), and the test sections were located in regions with different environmental conditions. The second objective was to develop a predictive model for skid resistance of seal coat surfaces and validate and revise an existing skid prediction model for asphalt pavements. Field testing primarily included measurements of coefficient of friction using a dynamic friction tester, pavement surface texture using a circular texture meter, and skid number using a skid trailer. The measurements were conducted on the outer lane where pavement surfaces experience significant polishing rates because most of the trucks use that lane. The resistance of aggregate to polishing and abrasion was studied using laboratory test methods. Several analytical models were developed to predict the friction and skid resistance of asphalt pavements and seal coat surfaces over their service life. These models incorporate parameters that describe aggregate resistance to abrasion and polishing, aggregate shape characteristics, aggregate gradation, and traffic level. These models were developed based on comprehensive field testing and aggregate laboratory characterization. Good correlations were found between the developed models and experimental data. The results demonstrated that aggregate and surface characteristics as well as traffic level have significant effect on skid resistance and rate of skid reduction. These models can be used during the mix design procedure to optimize the aggregate selection and aggregate gradation to produce mixtures with proper friction. In addition, these models can be incorporated in a Project Management System (PMS) at the network level to plan and program preventive maintenance activities to ensure that pavements have adequate skid resistance.
Pavement Macrotexture Review
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Author :
language : en
Publisher:
Release Date : 1980
Pavement Macrotexture Review written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Pavements categories.
This pavement macrotexture review is for highway engineers and administrators concerned with the improvement of pavement surface texture as a countermeasure for skidding accidents. A summary is presented of the fundamentals of tire-pavement skid resistance and the importance of pavement surface texture in reducing skidding accidents. This includes a discussion of the skid number and skid number-speed gradient and of the role of pavement surface microtexture and macrotexture in skid resistance. The most commonly used methods of measuring pavement macrotexture are described, and ways of achieving high macrotexture in new pavements and of restoring high macrotexture in existing pavements are given.
Evaluation Of Pavement Friction Characteristics
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Author : John Jewett Henry
language : en
Publisher: Transportation Research Board
Release Date : 2000
Evaluation Of Pavement Friction Characteristics written by John Jewett Henry and has been published by Transportation Research Board this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Technology & Engineering categories.
This synthesis report will be of interest to pavement design, construction, management, and research engineers, highway safety officials, and others concerned with pavement friction characteristics. It describes the current state of the practice and discusses the methods used for evaluating wet pavement friction characteristics of new and restored pavements. This synthesis reviews models used for measuring and evaluating friction and texture, causes for friction changes over time, and aggregate and mix design to provide adequate friction. Also presented are construction and surface restoration practices for providing good pavement surface characteristics. In addition, considerations of noise and ride quality are discussed when compromise may be required.
Investigation Of The Frictional Resistance Of Seal Coat Pavement Surfaces
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Author : Mohamed-Asem U. Abdul-Malak
language : en
Publisher:
Release Date : 1988
Investigation Of The Frictional Resistance Of Seal Coat Pavement Surfaces written by Mohamed-Asem U. Abdul-Malak and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Aggegrates (Building materials) categories.
Laboratory Study Of Microtexture Related Skid Resistance Characteristics Of Concrete Pavement Materials
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Author : TF. Fwa
language : en
Publisher:
Release Date : 1992
Laboratory Study Of Microtexture Related Skid Resistance Characteristics Of Concrete Pavement Materials written by TF. Fwa and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Accelerated polishing categories.
This paper reports the results of a laboratory test program conducted to study the variations of microtexture-related skid resistance of concrete materials with moisture condition, measurement temperature, and surface polishing. The materials used for concrete pavement construction in Singapore were studied. Surface wetting was found to produce a surface-wet frictional resistance considerably lower than the initial surface-dry value. However, neither the surface-wet nor surface-dry measurement was affected by the degree of moisture saturation of the materials tested. Surface temperature had a strong influence on the results of surface-wet tests, but not the surface-dry tests. The temperature-dependent variations was highly correlated to either measurement temperature or viscosity of water, always showing a coefficient of correlation exceeding 0.94 in absolute value. Polishing had the effect of reducing both surface-wet and surface-dry resistance. However, cement mortar specimens were found to respond differently from granite and steel slag aggregates due to differences of their surface wear behaviors in the process of polishing.
Eleventh International Conference On The Bearing Capacity Of Roads Railways And Airfields
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Author : Inge Hoff
language : en
Publisher: CRC Press
Release Date : 2021-11-10
Eleventh International Conference On The Bearing Capacity Of Roads Railways And Airfields written by Inge Hoff and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-11-10 with Technology & Engineering categories.
Innovations in Road, Railway and Airfield Bearing Capacity – Volume 1 comprises the first part of contributions to the 11th International Conference on Bearing Capacity of Roads, Railways and Airfields (2022). In anticipation of the event, it unveils state-of-the-art information and research on the latest policies, traffic loading measurements, in-situ measurements and condition surveys, functional testing, deflection measurement evaluation, structural performance prediction for pavements and tracks, new construction and rehabilitation design systems, frost affected areas, drainage and environmental effects, reinforcement, traditional and recycled materials, full scale testing and on case histories of road, railways and airfields. This edited work is intended for a global audience of road, railway and airfield engineers, researchers and consultants, as well as building and maintenance companies looking to further upgrade their practices in the field.