2 edition of Computer evaluation of pavement texture found in the catalog.
Computer evaluation of pavement texture
E. D. Howerter
by The Administration, National Technical Information Service [distributor] in Washington, D.C, Springfield, Va
Written in English
|Statement||prepared for Federal Highway Administration, Offices of Research & Development.|
|Contributions||Rudd, T. J., Sutermeister, R. E., United States. Federal Highway Administration. Offices of Research and Development.|
|The Physical Object|
The most important factors were (1) the avail- ability of pavement sections with the desired textures, (2) the interest and willingness of SHAs to assist in evaluating the test sections (e.g., coordinating traffic control, conducting fric- tion testing, and providing pavement and other relevant data on the test sections), (3) the age of or amount of traf- fic accumulated on the test sections, and (4) the geograph- ical . the pavement surface texture thereby causing loss of aircraft braking capability and directional control when runways are wet. In October , the FAA embarked on a 2-year program to conduct friction and pavement evaluation surveys at airports ( runways) within the contiguous United States. The information obtainedFile Size: 2MB.
/books books Thomas Telford Publishing /mcipe Modern Concepts in Pavement Engineering Modern Concepts in Pavement Engineering Thomas Telford Publishing /mcipe Pavement Evaluation Procedures Robert Armitage cal Director SWK Pavement Engineering 27 32 The Need for Pavement Monitoring and Evaluation . EVALUATION OF TEXTURE REQUIREMENTS FOR PORTLAND CEMENT CONCRETE PAVEMENTS The Texas State Depart~ent of Highways and Public Transportation (SDHPT) Standard Specifications require a transverse tine texture finish with an average texture depth (ATu) of at least inch with no single test below inch.
Surface Texture: Friction vs. Noise n Key elements n Maintain adequate friction for safety (wet and dry pavement conditions) n Cost effective n Durable n Minimize objectionable noise n Identify objectionable noise levels (frequency and intensity) n Adopt a meaningful evaluation criteria n Engineer and implement an appropriate solutionFile Size: 2MB. Asphalt Pavements contains the proceedings of the International Conference on Asphalt Pavements (Raleigh, North Carolina, USA, June ), and discusses recent advances in theory and practice in asphalt materials and pavements. The contributions cover a wide range of topics: Environmental pro.
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Additional Physical Format: Online version: Howerter, E.D. Computer evaluation of pavement texture. Washington, D.C.: The Administration ; Springfield, Va. A satisfactory pavement surface should exhibit good friction and texture depth to reduce roadway highway accidents.
There have been numerous research efforts by different countries and agencies to better understand the behavior of friction testing devices and the influence of texture, speed, and other external conditions on their by: 2.
-- A system for pavement macrotexture measurement developed by the Naval Surface Weapons Center, U.S. Navy, was evaluated. This system utilizes the. In a recently completed study involving a computer evaluation of pavement texture, it was determined that texture smaller than mm could be con- sidered microtexture and texture greater than mm could be classified as by: Evaluation of pavement skid resistance using high speed texture measurement.
Skid resistance is an important parameter for highway designs, construction, management, maintenance and safety.
Pavement Design and Materials is a practical reference for both students and practicing engineers that explores all the aspects of pavement engineering, including materials, analysis, design, evaluation, and economic analysis.
Historically, numerous techniques have been applied by a multitude of jurisdictions dealing with roadway by: which causes the decrease in pavement friction when a ﬁlm of water covers the road surface and the effect of pavement surface texture on it.
As a result, efforts in better understanding of effect of pavement texture, and its incorporation in the pavement safety equation appears to be a promising direction (Noyce et al., ). Texture Pavement surface texture is defined as the deviation of a pavement surface from a true planar surface, with a texture wavelengt h less than ft ( m), and divided into micro- macro- and mega-texture (Sandberg, ).
It is commonly described in terms of wavelength and amplitude. Texture data obtained from existing systems are restricted on either a small portion on pavement surface or one line-of-sight profile, and the currently used texture indicators, such as Mean Profile Depth (MPD), and Mean Texture Depth (MTD) only reveal partial aspects of texture by: 2.
Guide to Pavement Technology Part 5: Pavement Evaluation and Treatment Design provides advice for the investigation of existing sealed road pavements and the selection and design of pavement strategies/treatments.
It covers pavement investigation, testing and evaluation, identification of causes and modes of distress, and treatment options. Knowledge of pavement technology is of Cited by: 6. 2 MEASURING TEXTURE OF ASPHALT PAVEMENT USING DIGITAL IMAGE TECHNIQUE Based on the DSM, an evaluation of pavement texture can be implemented.
5 For example, the sand patch method (ASTM E [ASTM, ]) is a regular method for measuring pavement texture. It defines a mean texture depth (MTD) withFile Size: KB.
Laboratory testing, field construction, and decade long performance evaluation of jointed plain concrete pavement with FRP dowels P. Vijay, Hui Li & VS Hota GangaRao Pages: The categories for texture wavelengths include megatexture (50 to mm), macrotexture ( to 50 mm), and microtexture (tire-pavement noise by mega and macrotextures.
Skid resistance, however, may be contributed to by all three, especially microtexture. Evaluation of Pavement Surface Micro- and Macro-Texture.
The effect of the aggregate texture (micro-texture) and the effect of the texture of compacted hot mix asphalt (macro-texture) on the skid resistance of the highway surface are well recognized. 19 CHAPTER 4. PAVEMENT FRICTION AND SURFACE TEXTURE PAVEMENT FRICTION Definition Pavement friction is the force that resists the relative motion between a vehicle tire and a pavement surface.
This resistive force, illustrated in figure 8, is generated as the tire rolls or slides over the pavement surface. Figure 8. Convolutional Neural Network for Asphalt Pavement Surface Texture Analysis: Convolutional neural network August Computer-Aided Civil and Infrastructure Engineering.
Pavement Functional Surface Characteristics (PFSC) OVERVIEW / TEXTURE 1. Why PFSC are Important 2. Description of Functional Performance 3. Key Functional Performance Factors 4. Measurement and Evaluation Tools 5. Summary Most design. Evaluation of asphalt pavement texture mainly includes microtexture and macrotexture.
Macrotexture is closely related to the distribution and gradation of aggregates, while microtexture is dependent on aggregate morphological characteristics [10,11,12,13].The traditional test methods for texture property of asphalt pavements mainly include sand patch test and British pendulum by: Tire Pavement Noise and Safety Performance, PCC Surface Texture Technical Working Group: FHWA-SA Construction of Portland Cement Concrete Pavements - Particpant's Manual: FHWA-HI Air Void Analyzer Evaluation: FHWA-SA Portland Cement Concrete Materials: FHWA-HI Pavement textures.
textures in this category. Free for personal and commercial use. Pavement Structural Evaluation At The Network Level: FHWA-HRT Pavement Structural Evaluation at the Network Level: Final Report: FHWA-HRT Pavement Treatment Effectiveness, SPS-3 and SPS-4 Site Evaluations, National Report: FHWA-RDCreated Date: 1/3/ AM.Two methods of texture measurement are described: the outflow meter and profile analysis.
The outflow meter measures the time for a fixed quantity of water to escape between a rubber seal and the pavement. Its development from a simple gravity flow instrument to a high-pressure device is by: