Quantifying The Benefits Of Improved Rolling Of Chip Seals
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Author | : Y. Richard Kim |
Publisher | : |
Total Pages | : 152 |
Release | : 2008 |
Genre | : Pavements |
ISBN | : |
This report presents an improvement in the rolling protocol for chip seals based on an evaluation of aggregate retention performance and aggregate embedment depth. The flip-over test (FOT), Vialit test, modified sand circle test, digital image processing technique, and the third-scale Model Mobile Loading Simulator (MMLS3) are employed to evaluate the effects of the various rolling parameters and to measure chip seal performance. The samples used to evaluate the chip seal rolling protocol were obtained directly from field construction. In order to determine the optimal rolling protocol, the effects of roller type, number of coverages, coverage distribution on the sublayers of a multiple chip seal (i.e., the split seal and triple seal), and rolling pattern are evaluated using the results of aggregate retention performance tests, the modified sand circle method, and the digital image process. It is found that two types of roller, the pneumatic tire roller and the combination roller, are recommended as the optimal rollers for the chip seal. In addition, it is found that the optimal number of coverages for the chip seal is three coverages. Moreover, the performance of the triple seal without coverage at the bottom layer does not affect the aggregate retention performance, although the split seal does require coverage at the bottom layer. Finally, it is found from the MMLS3 results that the delayed rolling time between the spreading of the aggregate and the initial rolling significantly affects the aggregate loss, and that the delayed rolling time is related to the aggregate moisture condition and the ambient temperature. Effects of different rolling patterns are investigated based on the delayed rolling time and roller speeds, and recommendations are developed for two- and three-roller scenarios.
Author | : Douglas D. Gransberg |
Publisher | : Transportation Research Board |
Total Pages | : 120 |
Release | : 2005 |
Genre | : Asphalt emulsion mixtures |
ISBN | : 0309097444 |
TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 342: Chip Seal Best Practices examines ways to assist in the development and implementation of pavement preservation programs by identifying the benefits of using chip seal as part of a preventive maintenance program and by highlighting advanced chip seal programs in use around the world. The report includes approximately 40 best practices in the areas of chip seal design methods, contract administration, equipment practices, construction practices, and performance measures. According to the report, the increased use of chip seals for maintenance can be a successful, cost-effective way of using preventive maintenance to preserve both low-volume and higher-volume pavements.
Author | : Ken Skorseth |
Publisher | : |
Total Pages | : 112 |
Release | : 2000 |
Genre | : Gravel roads |
ISBN | : |
The purpose of this manual is to provide clear and helpful information for maintaining gravel roads. Very little technical help is available to small agencies that are responsible for managing these roads. Gravel road maintenance has traditionally been "more of an art than a science" and very few formal standards exist. This manual contains guidelines to help answer the questions that arise concerning gravel road maintenance such as: What is enough surface crown? What is too much? What causes corrugation? The information is as nontechnical as possible without sacrificing clear guidelines and instructions on how to do the job right.
Author | : |
Publisher | : |
Total Pages | : 524 |
Release | : 2005-01-01 |
Genre | : Asphalt emulsion mixtures |
ISBN | : 9780478105629 |
Author | : Harry A. Smith |
Publisher | : Transportation Research Board |
Total Pages | : 60 |
Release | : 1992 |
Genre | : Technology & Engineering |
ISBN | : 9780309053068 |
This synthesis will be of interest to construction, maintenance, pavement design, and materials engineers, pavement contractors, and others interested in the use of open-graded friction courses (OGFC) as an asphalt concrete pavement wearing surface. Information is provided on performance benefits and limitations of OGFC, material and mixture properties, and current construction practices in use in the United States and Europe. Advances in mixture design and construction techniques have overcome several of the performance limitations identified in early applications of OGFC, as well as enhanced the performance benefits associated with OGFC use. This report of the Transportation Research Board describes the current state of the practice with respect to the use of OGFC. Experience with the design, construction, and performance of OGFC is summarized, based on a review of the literature, documentation of experience from applications in the U.S. and Europe, and site visits to several states.
Author | : National Cooperative Highway Research Program |
Publisher | : |
Total Pages | : 720 |
Release | : 1992 |
Genre | : Highway engineering |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : 128 |
Release | : 2007-08 |
Genre | : |
ISBN | : |
Popular Science gives our readers the information and tools to improve their technology and their world. The core belief that Popular Science and our readers share: The future is going to be better, and science and technology are the driving forces that will help make it better.
Author | : |
Publisher | : AASHTO |
Total Pages | : 87 |
Release | : 2008 |
Genre | : Pavements |
ISBN | : 1560514280 |
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.
Author | : Y. Richard Kim |
Publisher | : |
Total Pages | : 106 |
Release | : 2017 |
Genre | : Binders (Materials) |
ISBN | : 9780309446167 |
This research report presents recommended emulsion performance grade (EPG) specifications for asphalt emulsions used in three pavement preservation surface treatments (PSTs): chip seal, microsurfacing, and spray seals. These EPG specifications are climate-driven and applicable to traffic loads that are anticipated during the service life of each PST. The report also presents recommended test protocols for evaluating some of the properties of binders for which test methods are not readily available. The information contained in the report will guide materials and maintenance engineers in evaluating, selecting, and specifying the binders for use in PSTs that will provide acceptable performance and service life. The information contained in the report will be of immediate interest to materials and maintenance engineers and others involved in specifying and evaluating materials intended for use in PSTs.
Author | : |
Publisher | : |
Total Pages | : 974 |
Release | : 1972 |
Genre | : Aeronautics |
ISBN | : |