Download or read book A Study of the Sand Patch and Outflow Meter Methods of Pavement Surface Texture Measurement written by Robert N. Doty and published by . This book was released on 1974 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Study of the Sand Patch and Outflow Meter Methods of Pavement Surface Texture Measurement written by RN. Doty and published by . This book was released on 1975 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study of the sand-patch and outflow meter methods of pavement surface texture measurement was completed. Included in this study were repeatability testing and testing to determine the degree to which pavement surface texture, as measured by these procedures, correlates with pavement coefficient of friction, skid number, and skid number speed gradient. Test locations were selected on open-graded and dense-graded asphalt concrete, chip-sealed and fog-sealed asphalt concrete, and new, polished, and grooved portland cement concrete (PCC) pavements. The results of the testing indicated that the repeatability of the sand patch test procedures studied was poor to fair and that the outflow meter test results were independent of water temperature. A general trend toward higher skid numbers and coefficients of friction was evident with increasing texture depth, as measured with both the modified sand patch and the outflow meter procedures. However, neither relationship was considered definitive enough to use as a basis for a minimum texture depth construction specification requirement for pavement surfaces. Also, neither method provided a definitive measure of skid number speed gradient.
Download or read book Pavement Texture Measurement by the Sand Patch and Outflow Meter Methods written by Rudolph Reuven Hegmon and published by . This book was released on 1970 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Surface Texture Versus Skidding written by and published by ASTM International. This book was released on with total page 159 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laboratory Evaluation of Pavement Surface Texture Characteristics in Relation to Skid Resistance written by S. H. Dahir and published by . This book was released on 1972 with total page 92 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 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 Use of the Digital Surface Roughness Meter in Virginia written by David W. Mokarem and published by . This book was released on 2006 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pavement surface texture is measured in a variety of ways in Virginia. Two methods commonly used are ASTM E 965, Standard Test Method for Measuring Pavement Macrotexture Depth Using a Volumetric Technique, known as the "sand patch" test, and ASTM E 2157, Standard Test Method for Measuring Pavement Macrotexture Properties Using the Circular Track (CT) Meter. In September 2005, staff from the Virginia Transportation Research Council inquired about using the Digital Surface Roughness Meter (DSRM®) to measure the surface texture of several concrete and asphalt surfaces. Measurements were taken on concrete and asphalt surfaces using the DSRM®, CT meter, and sand patch test, and the results were compared. From the data obtained, there appears to be a good correlation among the results of the three methods. The DSRM® and sand patch tests appear to be more accurate on surfaces that are not uniform. However, this may be because the center of the rotating arm of the CT meter may have missed particular non-uniform areas on the testing surface. The use of the DSRM® and CT meter devices also reduces the probability of human error. The sand patch test is exposed to a greater probability of human error; it is a test that cannot be performed quickly without comprising accuracy. The DSRM® is a better device to use under a time constraint.
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 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 Report No FHWA RD written by United States. Federal Highway Administration. Offices of Research and Development and published by . This book was released on 1978 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pavement Macrotexture Review written by and published by . This book was released on 1980 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Computer Evaluation of Pavement Texture written by E. D. Howerter and published by . This book was released on 1977 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Computer Evaluation of Pavement Texture written by and published by . This book was released on 1977 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bearing Capacity of Roads Railways and Airfields written by Andreas Loizos and published by CRC Press. This book was released on 2017-07-20 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bearing Capacity of Roads, Railways and Airfields includes the contributions to the 10th International Conference on the Bearing Capacity of Roads, Railways and Airfields (BCRRA 2017, 28-30 June 2017, Athens, Greece). The papers cover aspects related to materials, laboratory testing, design, construction, maintenance and management systems of transport infrastructure, and focus on roads, railways and airfields. Additional aspects that concern new materials and characterization, alternative rehabilitation techniques, technological advances as well as pavement and railway track substructure sustainability are included. The contributions discuss new concepts and innovative solutions, and are concentrated but not limited on the following topics: · Unbound aggregate materials and soil properties · Bound materials characteritics, mechanical properties and testing · Effect of traffic loading · In-situ measurements techniques and monitoring · Structural evaluation · Pavement serviceability condition · Rehabilitation and maintenance issues · Geophysical assessment · Stabilization and reinforcement · Performance modeling · Environmental challenges · Life cycle assessment and sustainability Bearing Capacity of Roads, Railways and Airfields is essential reading for academics and professionals involved or interested in transport infrastructure systems, in particular roads, railways and airfields.
Download or read book Computer Evaluation of Pavement Texture Technical report written by E. D. Howerter and published by . This book was released on 1977 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Pavement Texture written by and published by . This book was released on 1984 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: A system for pavement macrotexture measurement developed by the Naval Surface Weapons Center, U.S. Navy, was evaluated. This system utilizes the principle of depolarization of reflected polarized light, where the degree of depolarization is a function of the pavement macrotexture. In this report, the output of the system, the depolarized light number (DPN), is compared with other measures of pavement texture: sand-patch mean texture depth (MTD), British pendulum number (BPN), and outflow meter time (OFT) for 22 asphalt concrete sites and 5 portland cement concrete sites.
