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Author: Dung Hing Lau
Publisher:
ISBN:
Category :
Languages : en
Pages : 282
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Book Description
In conclusion, thin maintenance surfaces can be cost effective if the following recommendations are followed: 1) Equipment calibration is desired to ensure that the target material quantities are applied during construction, 2) the sampling of the test sections for performance evaluation to ensure that the number of sample units taken is representative of the entire section, 3) the design of the seal coat application rates, and 4) the type of the aggregate and the binder used for the seal coat mix design. However, the short-term data availability from this project prevents a thorough analysis on the impact of the surface treatments to the pavement surface. Therefore, continuous performance assessment is desired to validate and verify the results of this study.
Author: Dung Hing Lau
Publisher:
ISBN:
Category :
Languages : en
Pages : 282
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Book Description
In conclusion, thin maintenance surfaces can be cost effective if the following recommendations are followed: 1) Equipment calibration is desired to ensure that the target material quantities are applied during construction, 2) the sampling of the test sections for performance evaluation to ensure that the number of sample units taken is representative of the entire section, 3) the design of the seal coat application rates, and 4) the type of the aggregate and the binder used for the seal coat mix design. However, the short-term data availability from this project prevents a thorough analysis on the impact of the surface treatments to the pavement surface. Therefore, continuous performance assessment is desired to validate and verify the results of this study.
Author: Serhan Celik
Publisher:
ISBN:
Category :
Languages : en
Pages : 418
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Book Description
As a conclusion, thin maintenance surfaces can be cost effective and provide a serviceable and safe pavement conditions in the State of Iowa. However, some of performance problems based on treatment selection and timing for application, quality of materials, contractor qualification, construction season, design and construction procedures were identified. This study aimed to address some of these problems based on a literature review and performance evaluation of test sections. However, further research is needed to validate and verify the results of this study.
Author: Hernando Javier Quintero
Publisher:
ISBN:
Category :
Languages : en
Pages : 232
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Book Description
Thin Maintenance Surfaces (TMS) are asphalt-based treatments applied to structurally sound pavements in order to extend its service life. Pavement maintenance action should be considered before pavements show severe levels of distress to delay the need for rehabilitation or complete reconstruction. TMS are widely applied to flexible pavements in the state of Iowa. The purpose of this study is to evaluate the performance of TMS in Iowa. Four sets of test sections located on US 151, US 30, US 69, and US 218 were constructed and monitored with time. Test sections included the following maintenance surface treatments: Seal Coats, Slurry Seal, Micro-surfacing, Cape Seal, and Thin Lift Overlays (Hot Mix Asphalt, Hot Sand Mix, and Nova Chip[Registered Trademark symbol]. The performance of each test section was evaluated by comparing Pavement Condition Index (PCI), individual distresses, friction, and roughness. Pre construction condition of existing pavement, material selection, design procedures, construction procedures, and weather conditions during and after construction were important factors for this analysis.
Author: Cliff Alex Plymesser
Publisher:
ISBN:
Category :
Languages : en
Pages : 222
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Book Description
Many municipal street departments in Iowa have faced budget shortfalls due to revenue limitations in spite of increasing demands for service. These budget shortfalls do not allow them to adequately maintain an aging street system without careful planning. Thin maintenance surface (TMS) techniques have been developed to extend pavement life by mitigating existing distresses. TMS such as seal coat, slurry seal, micro-surfacing, and fog seal are cost effective preventive maintenance techniques that when properly used reduce pavement life cycle costs. Currently, many municipal street officials cannot expend the effort to test or improve existing preventive maintenance (PM) techniques. TMS are feasible PM techniques for cities to utilize however, further demonstration and evaluation in an urban context would be helpful. By performing these evaluations, researchers hope to encourage improved selection of maintenance techniques in urban settings. This research will show how TMS might be properly included in municipal street maintenance programs. The research will evaluate the use of TMS in urban settings by constructing three sets of test sections in three Iowa cities. The three types of surfaces that were used in this project were seal coats, chipmat, and micro-surfacing. Various binders and aggregates that are local to Iowa were used. Condition surveys were performed before and after the application of the test sections and will be performed after the first winter to evaluate the performance of the each new surface. Construction was observed and crews used typical construction techniques so that the results will be those that are achievable using current techniques. Conclusions drawn from this project include: 1) Pre-coated limestone chips outperformed other local aggregates, 2) a chipmat can be used to prevent reflective cracking, 3) emulsion can be used a tack coat for a chipmat, 4) limestone is a suitable aggregate for micro-surfacing, and 5) proper construction technique is one of the primary influences on the success of a TMS. These conclusions are based on a short-term analysis of the surface treatments applied during this research.
Author:
Publisher:
ISBN:
Category : Asphalt emulsion mixtures
Languages : en
Pages : 123
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Book Description
In recent years there has been renewed interest in using preventive maintenance techniques to extend pavement life and to ensure low life cycle costs for our road infrastructure network. Thin maintenance surfaces can be an important part of a preventive maintenance program for asphalt cement concrete roads. The Iowa Highway Research Board has sponsored Phase Two of this research project to demonstrate the use of thin maintenance surfaces in Iowa and to develop guidelines for thin maintenance surface uses that are specific to Iowa. This report documents the results of test section construction and monitoring started in Phase One and continued in Phase Two. The report provides a recommended seal coat design process based on the McLeod method and guidance on seal coat aggregates and binders. An update on the use of local aggregates for micro-surfacing in Iowa is included. Winter maintenance guidelines for thin maintenance surfaces are reported herein.
Author: Ken Skorseth
Publisher:
ISBN:
Category : Gravel roads
Languages : en
Pages : 112
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Book Description
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: Christine M. Reed
Publisher:
ISBN:
Category : Allowance for funds used during construction (Public utilities)
Languages : en
Pages :
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Book Description
In the mid-1980s, the Illinois Department of Transportation (IDOT) found itself challenged to maintain an aging highway network at an acceptable level of service on a limited financial base. This made programming rehabilitations for the rural highways difficult under the existing rehabilitation policies. In an effort to minimize the required maintenance effort on these highways as well as maximize the available rehabilitation dollars, IDOT initiated a new single pass, thin lift overlay rehabilitation strategy in 1986. The new rehabilitation strategy was titled Surface Maintenance at the Right Time (SMART). As part of this study, a three-phased performance evaluation was conducted. The first phase of the evaluation focused on the Condition Rating Survey (CRS) values. When the SMART program was established in 1986, it was hoped that the CRS value of a selected project, at least five years after rehabilitation, would be no lower than it was prior to rehabilitation. The methods of analyzing the CRS values included in this study indicated that this standard is being surpassed by a vast majority of the projects. The second phase of the evaluation investigated the riding quality indexes of the SMART projects. Like the CRS values, the analysis of the riding quality indexes indicated the SMART projects are exceeding expectations. The final phase of the evaluation focused on the construction costs of the SMART projects. The construction costs were subject to yearly fluctuations; however, the fluctuations were not excessive. Five years of close monitoring has shown the SMART program to be a viable rehabilitation alternative. This study concludes that the SMART program should be continued under the current guidelines.
Author: Chandra S. Desai
Publisher: Taylor & Francis US
ISBN: 9789058091857
Category :
Languages : en
Pages : 1008
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Book Description
Author:
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 120
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Book Description
Transportation Research Record contains the following papers: Potential for private-sector road maintenance in developing countries : case studies (Parkman, CC, Madelin, KB and Robinson, R); Improving road quality with focused daily road maintenance (Brown, M and Provencher, Y); Service life of durable pavement markings (Migletz, J, Graham, JL, Harwood, DW and Bauer, KM); Cost-benefit highway pavement maintenance (Najafi, FT and Paredes, V); Life-cycle cost comparison of asphalt and concrete pavements on low-volume roads : case study comparisons (Embacher, RA and Snyder, MB); To seal or not to seal? A field experiment to resolve an age-old dilemma (Hawkins, BK, Ioannides, AM and Minkarah, IA); Potential of using stone matrix asphalt for thin overlays (Cooley, LA and Brown ER); Construction and performance of an ultrathin bonded hot-mix asphalt wearing course (Hanson, DI); Maintenance of concrete bridges (Sprinkel, M); Thin polysulfide epoxy bridge deck overlays (Stenko, MS and Chawalwala, AJ); Pilot installation of a bridge scour monitoring site (Weissman, J, Chun, HT and Haas, C); Highway bridge inspection : state -of- the- practice survey (Rolander, DD, Phares, BM, Graybeal, BA and Moore, ME); Reliability and accuracy of routine inspection of highway bridges (Phares, BM, Graybeal, BA, Rolander, DD and Moore, ME); Reliability and accuracy of in-depth inspection of highway bridges (Graybeal, BA, Rolander, DD, Phares, BM and Moore, ME); Field test of new procedure for removing lead-based paint from bridges (Bushman, WH and Jackson, DR).
Author: Robert Otto Rasmussen
Publisher: Transportation Research Board
ISBN: 0309070198
Category : Pavements
Languages : en
Pages : 96
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Book Description
TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 338: Thin and Ultra-Thin Whitetopping summarizes available information to document how state departments of transportation and others are currently using thin and ultra-thin whitetopping overlays among various pavement rehabilitation alternatives. The report covers all stages of the proper application of whitetopping overlays, including project selection, design, materials selection, construction, maintenance, and eventual rehabilitation or replacement.
