Download or read book The Journey Toward End Result Specifications for Asphalt Concrete written by Charles S. Hughes and published by . This book was released on 2000 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Virginia Department of Transportation has been working to replace traditional asphalt concrete specifications with end result specifications since the mid 1960s. The type of end result specification that is most possible is the performance-related specification where product quality characteristics and life-cycle cost relationships are correlated with performance. The development of tests for quality characteristics and the development of reliable life-cycle cost relationships present challenges. The identified asphalt concrete quality characteristics were degree of compaction, thickness, smoothness, segregation, strength, and durability. Each characteristic is discussed, and an estimate is given with regard to when each characteristic could be used in a specification. It was estimated that a performance-related specification for asphalt concrete may be possible in Virginia by the year 2005.
Download or read book The Next Step Toward End result Specifications for Hot mix Asphalt Materials and Construction written by Charles S. Hughes and published by . This book was released on 2007 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2000, the Virginia Department of Transportation's (VDOT) Chief Engineer asked the Virginia Transportation Research Council to develop a vision of how and when VDOT would have a working end-result specification for hot-mix asphalt. The response to that question was that it would take several years and many steps to achieve. This report discusses the next step in that ongoing effort, which includes the development and simulated application of two statistical quality assurance (SQA) special provisions, one for asphalt concrete material and the other for asphalt concrete pavement. The criteria for these prototype SQA provisions included the application of standard national terminology and approach, a firm basis in existing VDOT specifications, and quality characteristics that represent the best practical performance measures. This report describes the outcome of a "shadow" application of the proposed SQA specifications to a subset of Virginia's annual maintenance-resurfacing projects. Although the involved production and placement activities were not subject to the requirements of the SQA specifications, the sampling and testing were designed to represent what would have been required had the special provisions been in effect. The study further determined the likely acceptance outcome for each shadow project and explored future modifications to specification limits and pay adjustment criteria. The most desirable benefit from effective end-result specifications stems from the ability to rededicate available inspection to those key production and placement processes (e.g., joint tacking and surface preparation) that cannot be measured upon delivery to the owner/agency. A less desirable, but more tangible, financial benefit results when these specifications permit a reduction in the overall inspection force. One conservative estimate suggests that VDOT could save more than $2 million per year in inspector salaries through an end-result specification for acceptance of hot-mix asphalt pavements
Download or read book Qualifying Items of Work for End result Specifications written by William E. Elmore and published by . This book was released on 1997 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Texas Department of Transportation (TxDOT) is presently using a quality control/quality assurance (QC/QA) specification for hot-mix asphalt concrete pavement. There is a strong interest in determining if other construction items can be converted to this type of specification. The purpose of this report is to (1) review the experiences of a large number of key states believed to be using these types of specifications, (2) review the TxDOT standard specifications in order to recommend candidates for development, and (3) develop a recommended QC/QA specification for flexible base. Of the 23 states contacted, 19 cooperated in the survey, the majority of which were willing to provide copies of their specifications. Fifteen specifications have been received. Based on the information obtained from these reviews, nine items have been recommended for consideration by TxDOT.
Download or read book Recommended Performance related Specification for Hot mix Asphalt Construction written by Jon A. Epps and published by Transportation Research Board. This book was released on 2002 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Virginia State Documents written by and published by . This book was released on 2002 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book End result Smoothness Specifications for Rigid and Flexible Pavements in Texas written by Dimitrios G. Goulias and published by . This book was released on 1992 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report focuses on the development of a methodology for determining an end-result smoothness specification for use on newly constructed flexible and rigid pavements. Details of the experimental study and data analysis undertaken to define acceptance levels using several criteria are presented, along with necessary guide-lines that can be used for the training of personnel involved in the implementation of the smoothness specifications. Finally, the report correlates profile index with other roughness indices.
Download or read book Framework for Development of Performance related Specifications for Hot mix Asphaltic Concrete written by David A. Anderson and published by Transportation Research Board. This book was released on 1990 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Potential Applications of End result and Performance related Specifications written by and published by . This book was released on 1995 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book BITUMINOUS concrete mixes written by and published by . This book was released on 1967 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Superpave Mix Design written by Asphalt Institute and published by . This book was released on 2001-01-01 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Texture Ride Quality and the Uniformity of Hot mix Asphalt Pavements written by Kevin K. McGhee and published by . This book was released on 2005 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two years ago, the author completed a study with researchers at Virginia Tech that was designed to develop a tool to measure and control segregation of hot-mix asphalt pavements. This earlier work focused on the application of high-speed texture measurements and ultimately proposed an approach that would discourage segregation by establishing limits on allowable fluctuation of pavement macrotexture. Rather than emphasize segregation detection and measurement, the proposed special provision promoted new-surface uniformity. The activities discussed in this report represent the next step in the process of understanding the relationship between the uniformity and surface characteristics of hot-mix asphalt. The study documents the typical "texture profile" for Virginia's most common surface mixes. It revisits the texture-fluctuation provision proposed in the earlier project and delves into an expanded use of elevation profiles for promoting uniformity. Although the major findings and conclusions from this work do not specifically support a texture-based "segregation specification," the study does advocate continued dedication to material and construction uniformity. Alternatives to a texture-based specification include quality measures that recognize variability of traditional quality characteristics (such as percent defective and percent within limits specifications) and a new approach to reporting and using ride quality data, i.e., "roughness profiles." Whether specifically required or used voluntarily to comply with provisions that have stringent variability components (e.g., ride, texture, density), a properly functioning and operated material transfer vehicle is a proven contributor to good hot-mix uniformity. If the vehicle (at $900/mile) eliminates an estimated $3,000 per lane-mile loss in service life due to low-level segregation, the benefit-to-cost ratio is greater than 3.
Download or read book Highway Quality Compendium written by and published by . This book was released on 2007 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings Quality control techniques written by and published by . This book was released on 1965 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pavement Engineering written by Rajib B. Mallick and published by CRC Press. This book was released on 2017-10-16 with total page 1013 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pavement Engineering will cover the entire range of pavement construction, from soil preparation to structural design and life-cycle costing and analysis. It will link the concepts of mix and structural design, while also placing emphasis on pavement evaluation and rehabilitation techniques. State-of-the-art content will introduce the latest concepts and techniques, including ground-penetrating radar and seismic testing. This new edition will be fully updated, and add a new chapter on systems approaches to pavement engineering, with an emphasis on sustainability, as well as all new downloadable models and simulations.
Download or read book Public Works written by and published by . This book was released on 1960 with total page 1294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Construction Specifications for Asphalt Concrete and Other Plant mix Types written by Asphalt Institute and published by . This book was released on 1969 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book End Result Specifications A Contractor s Viewpoint written by WH. Jones and published by . This book was released on 1980 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Method-type specifications penalize a competent asphalt paving contractor by requiring the contractor to use prescribed equipment, materials, and methods to construct a particular pavement. End-result specifications, on the other hand, allow the contractor to use his available resources to accomplish the required end product in the manner of his own preference.
