Download or read book Summary of Pavement Surface Texture Measurement Methods written by Jerry G. Rose and published by . This book was released on 1971 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Pavement Surface Texture written by James C. Wambold and published by . This book was released on 1984 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: "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.
Download or read book Summary and Analysis of the Attributes of Methods of Surface Texture Measurement written by JG. Rose and published by . This book was released on 1973 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is well established among researchers in the pavement friction area that type of surface texture greatly influences the friction properties of pavement surfaces. Although it is recognized that other factors not necessarily related to surface texture also affect surface friction, various agencies in this country and abroad are engaged in developing methods for measuring pavement surface texture. Some 20-odd extant methods are currently used. The relative attributes of many of these methods are questioned, since results of tests using these methods have not, on the whole, produced consistent or reproducible quantitative results.
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.
Download or read book Pavement Surface Texture Significance and Measurement Volume I Summary Report written by James C. Wambold and published by . This book was released on 1984 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Skid Resistance of Highway Pavements written by and published by ASTM International. This book was released on 1973 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pavement Surface Texture Significance and Measurement Volume II Comprehensive Report Final Report written by James C. Wambold and published by . This book was released on 1984 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measuring Surface Texture of Concrete Pavements by the Sand patch Method written by William P. Chamberlin and published by . This book was released on 1978 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Three dimensional Pavement Surface Texture Measurement and Statistical Analysis written by Qingfan Liu and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Relationship Between Pavement Surface Texture and Highway Traffic Noise written by Roger L. Wayson and published by Transportation Research Board. This book was released on 1998 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This report will be of interest to state DOT pavement engineers, environmental specialists, and noise analysts. The relationship between pavement surface texture and highway traffic noise is discussed. Information for the synthesis was collected by surveying state transportation agencies and by conducting a literature search of both domestic and foreign publications."--Avant-propos.
Download or read book Pavement Surface Texture written by James C. Wambold and published by . This book was released on 1984 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterisation of Areal Surface Texture written by Richard Leach and published by Springer Science & Business Media. This book was released on 2013-04-03 with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt: The function of a component part can be profoundly affected by its surface topography. There are many examples in nature of surfaces that have a well-controlled topography to affect their function. Examples include the hydrophobic effect of the lotus leaf, the reduction of fluid drag due to the riblet structure of shark skin, the directional adhesion of the gecko foot and the angular sensitivity of the multi-faceted fly eye. Surface structuring is also being used extensively in modern manufacturing. In this way many properties can be altered, for example optical, tribological, biological and fluidic. Previously, single line (profile) measurements were adequate to control manufacture of surfaces, but as the need to control the functionality of surfaces increases, there is a growing need for three-dimensional (areal) measurement and characterisation techniques. For this reason there has been considerable research, development and standardisation of areal techniques. This book will present the areal framework that is being adopted by the international community. Whereas previous books have concentrated on the measurement aspects, this book concentrates on the characterisation techniques, i.e. how to interpret the measurement data to give the appropriate (functional) information for a given task. The first part of the book presents the characterisation methods and the second part case studies that highlight the use of areal methods in a broad range of subject areas - from automobile manufacture to archaeology. Contents Introduction to Surface Topography The Areal Field Parameters The Areal Feature Parameters Areal Filtering Methods Areal Form Removal Areal Fractal Methods Choosing the Appropriate Parameter Characterisation of Individual Areal Features Multi-Scale Signature of Surface Topography Correlation of Areal Surface Texture Parameters to Solar Cell Efficiency Characterisation of Cylinder Liner Honing Textures for Production Control Characterisation of the Mechanical Bond Strength for Copper on Glass Plating Applications Inspection of Laser Structured Cams and Conrods Road Surfaces
Download or read book The Significance of Pavement Texture written by Glenn G. Balmer and published by . This book was released on 1975 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This paper discusses the influence of roadway surface textures on the skid resistance, the speed-gradient, the wet-pavement accident rate, pavement wear, and the generation of tire-road interaction noise. The tendency of a vehicle to hydroplane is reduced by increasing the texture magnitude. Appropriate textures are developed by using open-graded asphalt friction surface courses and by grooving portland cement concrete with steel tines or a vibrating float while the concrete is plastic. Hardened pavements can be textured by grooving with a diamond saw or by resurfacing with an overlay. More development is needed in texture measurement techniques, especially in automating the stereo-photo interpretation method and the linear polarized laser technique"--Technical report documentation page
Download or read book Measuring Surface Texture by the Sand Patch Method written by WP. Chamberlin and published by . This book was released on 1982 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: Components of variance were analyzed for 720 measures of concrete pavement texture depth obtained by the sand-patch method. The measurements were made in connection with a complete factorial field experiment involving four texturing methods used on two sections each of five different paving jobs. Each pavement section was tested at three different sites by three different operators performing two tests each. The analysis permitted estimates of the repeatability and reproducibility of the sand-patch test, as well as errors that can be expected in measuring the mean texture depths of a section of textured pavement.
Download or read book Pavement Surface Characteristics and Materials written by C. M. Hayden and published by ASTM International. This book was released on 1982 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Improving Pavement Surface Texture Using Laser Scanning and Numerical Analysis written by Sareh Kouchaki and published by . This book was released on 2019 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: Safe roads need pavement surfaces that provide an adequate level of skid resistance to reduce accidents, especially under wet conditions. The extent of skid resistance available on any given pavement is dependent on the design of the surface texture. When the pavement surface texture is worn, the tire-pavement friction decreases and consequently the safety of the road users is reduced. Proper aggregate selection before construction helps in preserving adequate levels of skid resistance over the service life of the pavements. The critical engineering features expected from aggregates are their surface texture and resistance to the polishing actions of traffic. Currently, there are no standard quantitative test methods to measure the surface texture of aggregate particles directly. Besides, the existing laboratory test procedures used to evaluate the polishing resistance of aggregates are time-consuming, subjective, and cannot appropriately represent their frictional properties. A laboratory protocol is needed to assess the quality of aggregate particles for frictional purposes accurately. Investigating the changes in pavement macrotexture is also required during the life of pavements to assess the potential skid-related problems and reduce crashes effectively. The pavement macrotexture is predominantly described by the Mean Texture Depth (MTD) using the Sand Patch Test (SPT), and by the Mean Profile Depth (MPD) using non-contact single-point profilometers. The reliability of the SPT is questionable because it is operator-dependent and the MPD calculated using a single texture profile cannot adequately describe the pavement texture. The limitations of the current measuring methods for pavement texture have directed researchers toward looking for new, more objective, accurate and reliable technologies that could potentially contribute towards better pavement surface texture evaluation. With a better texture characterization, highway agencies can better assess the level of skid resistance of their highway network with the aim of ensuring safer roads for the public. The main contributions of this dissertation include a series of procedures and algorithms, developed using a high-resolution line laser scanner (LLS) prototype, to improve capturing and characterizing hot-mix asphalt (HMA) pavement surface texture. The methods and algorithms that have been developed in this dissertation include: 1) An outlier and spikes removal technique and set of criteria employing several filters to create clean 3D models of pavement surfaces, 2) A methodology to obtain the micro- and macrotexture of the surface profiles captured by the LLS, and automatically calculate the MPD based on pavements 3D texture data, 3) An algorithm to mimic the SPT on pavements 3D models and to automatically estimate the MTD based on the 3D texture data, 4) A new approach for quantification and differentiation the aggregates surface texture by using spectral analysis, 5) Using the Micro-Deval machine along with the LLS to develop a method for measuring aggregate polishing resistance, and 6) To categorize the aggregate particles based on their polishing resistance using model-based clustering techniques. This study was complemented by conducting a series of experimental field tests to compare the performance of the developed macrotexture characterization algorithms with current test methods. Results confirmed that the proposed algorithms could provide efficient, reliable, repeatable, and accurate measurements of the pavement surface macrotexture. Laboratory experiments were also conducted to characterize the polishing properties of seven types of aggregates based on their texture evolution. Following the polishing process, surface elevation profiles were obtained using the LLS and analyzed to determine the rate of change in the surface texture of aggregate samples. Texture measurements were carried out by using several texture parameters. Both visual examinations and statistical analysis were used to identify the differences between the aggregates polishing properties. The results showed that the polishing tendency of aggregates evaluated could be grouped according to the rate of change in surface texture
Download or read book Report No FHWA RD written by United States. Federal Highway Administration. Offices of Research and Development and published by . This book was released on 1974 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
