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This study was initiated to determine relative cost-effectiveness of various preventive maintenance procedures and applications in extending pavement service-life, and to establish pavement distress limits within which each procedure is cost-effective on full-depth asphalt-cement-concrete pavements and on composite pavements. This was achieved by analyzing annual survey data and documenting condition of four maintenance treatments (crack sealing, chip seals, armor coats, and overlays) applied to surfaces having various levels of service, distress, and roughness. Based on data collected through 1988, three general conclusions applying to performance of the treatments appear warranted: (1) Not all variables had equal effects on service-lives of the treatments tested, and effects of individual variables were indeterminately comingled; (2) Because the pavements treated were adequately designed and built for the AADTs encountered, it was not possible to assess the effect of AADT on treatment service-lives; and (3) The single variable exhibiting most significant effect on longevity of any of the treatments tested, other than the treatments themselves, was pavement type, stratified by thickness (for full-depth asphalt-cement-concrete pavements). In addition, median service-lives were determined for each of the treatments, as well as distress limits within which each may be used cost-effectively.
This synthesis will be of interest to highway agency executive management including administrative, budget, and finance personnel; pavement design, construction, and maintenance engineers; and maintenance operations personnel, including supervisors and maintenance crew leaders. This synthesis describes the state of the practice with respect to setting a coherent strategy of cost-effective preventive maintenance for extending pavement life. This report of the Transportation Research Board describes the practices of state, local, and provincial transportation agencies that are attempting to minimize the life-cycle costs of pavements and are identifying, during the design of the pavement rehabilitation, reconstruction, or construction projects, the future preventive maintenance treatments and the timing and funding for those treatments. It includes a review of domestic literature and a survey of current practices in North America. The appendices include a primer on pavement design and construction, the benefits of preventive maintenance of pavements, a summary of the questionnaire data collected, a simulation of pavement management strategies, and an example process to demonstrate the cost- effectiveness of preventive maintenance.
This book provides an overview of asphalt pavement maintenance, highlighting the key asphalt pavement maintenance technologies in China. It analyzes the trend toward preventive maintenance technologies and proposes technical guidelines and implementation rules for preventive maintenance. As such it is a valuable reference resource for technicians in related industries, both in China and abroad, as well as professionals involved in road infrastructure maintenance projects in countries participating in the Belt and Road Initiative.
"TRB's National Cooperative Highway Research Program (NCHRP) Report 523: Optimal Timing of Pavement Preventive Maintenance Treatment Applications describes a methodology for determining the optimal timing for the application of preventive maintenance treatments to flexible and rigid pavements. NCHRP Report 523 also presents the methodology in the form of a macro-driven Microsoft Excel Visual Basic Application--designated OPTime"--Publisher's description.
An extensive literature review was conducted to synthesize past and ongoing research related to highway pavement maintenance and preservation techniques. The literature review was augmented with a web-based email survey that was distributed to all 50 U.S. states, the District of Columbia and 11 Canadian provinces, for a total of 62 recipients. The literature review and survey results provide interesting qualitative overviews of the state-of-the-practice of preventive maintenance treatments, and how these treatments are instigated, managed, and accessed by transportation department personnel throughout North America. This report focuses on studies that quantified the performance of various preventive maintenance treatments, including the effect these treatments have on pavement performance.