Author: Herbert N. Swanson
Publisher:
Published: 1980
Total Pages: 0
ISBN-13:
DOWNLOAD EBOOK →Measures to reduce or eliminate bridge deck deterioration by the use of various protective systems have been the subject of a series of reports begun in 1976. This report presents current observations of latex modified deck topping concrete protective systems. Latex modified concrete topping has not provided long-term protection for the ten structures under evaluation in Colorado, Cost comparison are made between repair with latex modified concrete and deck replacement. Over a 40-year period, replacement costs are slightly less than rehabilitation costs. Greater control of the curing of deck topping material may reduce shrinkage cracking. Nightime paving, cooler calmer weather and higher humidity would increase the probability of success on latex modified concrete to rehabilitation projects. Asphalt membrane and asphalt overlay are also suggested to increase the probability of success. Implementation: Latex modified concrete is not recommended as a rehabilitation option in Colorado at this time. Further evaluation of two structures using latex modified concrete under nigh paving and tight control of curing methods is currently underway on I-25 North of Longmont.
Author: A.S. Nowak
Publisher: Springer Science & Business Media
Published: 2012-12-06
Total Pages: 618
ISBN-13: 9400921535
DOWNLOAD EBOOK →Evaluation, repair and rehabilitation of bridges are increasingly important topics in the effort to deal with the deteriorating infrastructure. For example, in the United States about 40 percent of the nation's 570,000 bridges are classified, according to the Federal Highway Administra tion's (FHW A) criteria, as deficient and in need of rehabilitation and replacement. In other countries the situation is similar. FHW A estimates the cost of a bridge replacement and reha bilitation program at 50 billion dollars. The major factors that have contributed to the present situation are: the age, inadequate maintenance, increasing load spectra and environmental contamination. The deficient bridges are posted, repaired or replaced. The disposition of bridges involves clear economical and safety implications. To avoid high costs of replacement or repair, the evaluation must accurately reveal the present load carrying capacity of the struc ture and predict loads and any further changes in the capacity (deterioration) in the applicable time span. Accuracy of bridge evaluation can be improved by using the recent developments in bridge diagnostics, structural tests, material tests, structural analysis and probabilistic methods. There is a need for an international exchange of advanced experience to increase the research effi ciency. The Workshop is organized on the premise that the exchange of existing American and European experience in the area of bridge evaluation, repair and rehabilitation is beneficial for both parties involved.
Author: Minnesota. Department of Transportation. Research and Standards Section
Publisher:
Published: 1977
Total Pages: 84
ISBN-13:
DOWNLOAD EBOOK →Author: United States. General Accounting Office
Publisher:
Published: 1979
Total Pages: 36
ISBN-13:
DOWNLOAD EBOOK →Author: Maine. Department of Transportation. Technical Services Division. Research and Development Section
Publisher:
Published: 1992
Total Pages: 303
ISBN-13:
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