Effects Of Pavement Surface Characteristics And Textures On Skid Resistance
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Effects Of Pavement Surface Characteristics And Textures On Skid Resistance Interim Report
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Author : Bob M. Gallaway
language : en
Publisher:
Release Date : 1971
Effects Of Pavement Surface Characteristics And Textures On Skid Resistance Interim Report written by Bob M. Gallaway and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with categories.
Effects Of Pavement Surface Characteristics And Textures On Skid Resistance
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Author : Bob M. Gallaway
language : en
Publisher:
Release Date : 1971
Effects Of Pavement Surface Characteristics And Textures On Skid Resistance written by Bob M. Gallaway and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with Pavements 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.
Laboratory Evaluation Of Pavement Surface Texture Characteristics In Relation To Skid Resistance
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Author : S. H. Dahir
language : en
Publisher:
Release Date : 1972
Laboratory Evaluation Of Pavement Surface Texture Characteristics In Relation To Skid Resistance written by S. H. Dahir and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972 with Motor vehicles categories.
Evaluation Of Pavement Surface Texture
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Author : James C. Wambold
language : en
Publisher:
Release Date : 1984
Evaluation Of Pavement Surface Texture written by James C. Wambold and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with Pavements categories.
"It is generally agreed that the skid resistance of a pavement is controlled by the surface texture characteristics. Therefore, by measuring the relevant parameters describing texture, or by measuring a physical process dependent on texture, regression techniques can be used to relate skid resistance to the chosen texture parameter or process. Two scales of texture are of particular importance: microtexture (small-scale asperities) and macrotexture (large-scale asperities). This report describes work performed to: (1) review candidate macrotexture and microtexture measurement methods that can be made at highway speeds (at or above 40 mph), which are presently used or have potential for use in pavement texture measurement; (2) design and build a prototype of the most promising method; (3) evaluate the effects of pavement surface texture on skid resistance; and (4) investigate non-friction-related effects of pavement surface texture. A prototype noncontact vision system which takes texture measurements at highway speeds was developed, and several improvements were made to upgrade the system to provide an advanced-operational prototype. Both hardware and software enhancements have yielded a texture measurement system that is a fast, efficient, and reliable way of obtaining pavement macrotexture data"--Technical report documentation p.
Effects Of Pavement Texture On Skid Resistance
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Author : F. E. Behn
language : en
Publisher:
Release Date : 1977
Effects Of Pavement Texture On Skid Resistance written by F. E. Behn and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1977 with Pavements categories.
Tire Pavement Interaction Experimental Measurements And Modeling
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Author : Mohammad O. Al-Assi
language : en
Publisher:
Release Date : 2019
Tire Pavement Interaction Experimental Measurements And Modeling written by Mohammad O. Al-Assi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with Pavements categories.
Providing an adequate level of skid resistance is essential for the safety of motorists. Previous studies demonstrated that the number of crashes is reduced if pavements have sufficient friction, especially in wet conditions. Adequate pavement friction prevents the vehicle from sliding on the pavement surface and provides the grip needed to maintain control over the vehicle. The first phase of this study investigated experimentally the two major friction mechanisms (i.e., adhesion and hysteresis) that contribute to tire-pavement friction. It is postulated that the adhesion between rubber tires and pavements is highly influenced by the surface free energy. However, there are no previous studies carried out to investigate the adhesion between rubber tires and pavements using the surface free energy. The results demonstrated that adhesion friction can be quantified by measuring the surface free energy components of pavement surface aggregates and rubber materials. There was a fair correlation between the adhesive bond energy and the measured coefficient of friction. Higher adhesion between rubber materials and pavement surface provided higher friction. These results provide a fundamental understanding of the mechanisms of rubber-pavement friction and verification of the relationship between adhesion and friction. In addition, there was a strong correlation between friction and rubber rheological properties. Rubber materials with lower modulus provided higher friction compared to those with higher modulus. These results explain the change in skid resistance with temperature throughout the year. The second phase of this study examined different factors that affect skid resistance of pavement surfaces. These parameters included macrotexture, microtexture, and driving speed. The macrotexture of the pavement is related to aggregate gradation of the mix or surface texture pattern. The microtexture is influenced by the roughness of the aggregate particles and their resistance to abrasion and polishing under traffic. This study proposed a new model that can be used to estimate the skid number at a given speed between 20 mph and 60 mph as a function of both macrotexture and microtexture of pavement surface. This model was developed based on the measured frictional characteristics of field test sections. The proposed model can be used if the full-scale friction tester is not available or cannot be used due to the limited length of the test section (e.g., bridge deck). In addition, the model provides a tool to the pavement engineers to ensure adequate skid resistance at various operation speeds during the mix design stage and before the mix is used in the field. A given mix design can be modified to improve its frictional characteristics at early stage which leads to cost savings often spent on the application of surface treatments. The third phase of this study utilized the close-range photogrammetry (CRP) technique to measure the pavement macrotexture and microtexture. Texture parameters were calculated from the collected and analyzed images of the pavement surface. The results of the CRP texture measurements were compared to standard test methods. The CRP texture measurements had excellent correlation with the standard methods; however, the CRP offers simple and accurate, yet inexpensive alternative to the current methods used to measure surface macrotexture and microtexture. In addition, the CRP texture parameters were incorporated in the Persson friction model to predict skid friction as a function of rubber properties. The results demonstrated excellent correlation between measured and predicted friction. This study greatly simplified the texture parameter calculations needed in the Persson friction model with good accuracy.The last component of this study developed a 3D finite element model to investigate the effect of surface characteristics along with rubber properties on the contact stress between the standard skid test tire and pavement surface. Such simulation provides an in-depth understanding of tire-pavement interaction that would require expensive resources to examine in the field. Study parameters included various coefficient of friction, texture (e.g., smooth, and grooved), tire rolling conditions (fully skidding and free rolling) as well as temperature. The developed 3D FE model of the test tire was first validated with laboratory measurements before it was used to examine the effect of the study parameters on tire-pavement contact stresses. The results of the finite element simulations demonstrated that the stress distribution at the tire-pavement interface is non-uniform with maximum values towards the edges of the tire. These findings were consistent with the wearing pattern of the test tire in the field. In addition, the results also demonstrated that the shear stresses increased with surface friction while there was no significant change in the vertical stresses. The grooved surface exhibited higher vertical and shear stresses compared to pavement with smooth texture. The grooved texture is used to improve skid resistance and reduce the noise of pavement surfaces. In addition, temperature was found to have significant impact on the stresses at the tire-pavement interface. The finite element simulation results agreed with the laboratory and field measurements of pavement friction.
Surface Characteristics Of Roadways
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Author : W. E. Meyer
language : en
Publisher: ASTM International
Release Date : 1990
Surface Characteristics Of Roadways 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 1990 with Pavements categories.
Roads And Airports Pavement Surface Characteristics
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Author : Maurizio Crispino
language : en
Publisher: CRC Press
Release Date : 2023-06-05
Roads And Airports Pavement Surface Characteristics written by Maurizio Crispino and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-06-05 with Technology & Engineering categories.
Roads and Airports Pavement Surface Characteristics contains the papers presented at the 9th International Symposium on Pavement Surface Characteristics (SURF 2022, Milan, Italy, 12-14 September 2022). The symposium was jointly organized by the Italian company that manages Italy’s National Roads (ANAS –Ferrovie dello Stato Italiane Group), the World Road Association (PIARC) and Politecnico di Milano. The contributions aim to improve the quality of pavement surface characteristics while accomplishing efficiency, safety, sustainability, and addressing new generation mobility needs. The book covers topics from emerging research to engineering practice, and is divided in the following sections: Advanced and performing construction methods and equipment Next generation mobility Data monitoring and performance assessment Surface features and performances| Maintenance and preservation treatments Pavement management Economic and political strategies Safety and risk issues Minimizing road impacts Sustainability and performances issues about materials and design Pavements surfaces and urban heat islands Weather conditions impact Airport pavements Roads and Airports Pavement Surface Characteristics is of interest to academics, engineers and professionals in the fields of pavement engineering, transport infrastructure, and related disciplines.
Surface Texture Versus Skidding
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Author :
language : en
Publisher: ASTM International
Release Date :
Surface Texture Versus Skidding written by and has been published by ASTM International this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.