Download PDF by Neal H. Bettigole: Bridge decks : design, construction, rehabilitation,

By Neal H. Bettigole

ISBN-10: 078440223X

ISBN-13: 9780784402238

This booklet is a accomplished reference for the assessment, checking out, choice, and exam of appropriate layout standards and choices for bridge decks, which look within the AASHTO/LRFD layout standards. very important demanding situations to civil engineers, comparable to lifestyles cycle expense research, and constructability, really as relating to protecting site visitors in the course of deck substitute, are mentioned. The authors talk about why using normal bridge deck designs isn't consistently attainable on bridge rehabilitation tasks. This functional reference will reduction busy engineers in facing the most important adjustments that may mandate a lot higher cognizance to deck choice and layout sooner or later. for instance, such a lot destiny bridge tasks will contain rehabilitation or replacement\=which makes site visitors upkeep an enormous issue\=and existence cycle expense research is instantly turning into obligatory within the U.S. This advisor is meant for use in the course of the improvement of any building venture related to bridges

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The more conventional chain drag and hammer methods are far less expensive and do not require experienced technicians and operators. Another nondestructive method for decks that have not been overlaid with asphalt or any other surfacing material is thermographic mapping. This is done with special equipment housed in mobile units that operate over large areas at fairly high speeds. On-board computers provide the data that identify distressed areas. For decks that have been overlaid with a wearing course, ground penetrating radar can evaluate the concrete deck.

They are not part of original construction, and should be applied under a maintenance contract during warm weather. Precautions before applying a sealer include sandblasting or even shotblasting to remove oils and other surface contaminants. Any visible cracks should be filled, either with a separate epoxy application or by first sealing the cracks and then resealing the entire surface. The surface must be dry as well as clean, and protected against rain or traffic spray after application. COATING STEEL REBAR One of the newer ways to prevent corrosion of reinforcing steel is to coat the steel itself.

Other methods of preventing corrosion of the reinforcing steel involve protecting the deck itself, either by sealers or overlays. Such additions must be durable yet breathable, allowing vapor to pass but barring water. Sealers come in both solvent- and water-based versions. According to research done for the Strategic Highway Research Program of the National Research Council, only penetrating sealers, silanes, and siloxanes (or combinations) are recommended. Other types failed to penetrate enough to resist traffic abrasion.

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Bridge decks : design, construction, rehabilitation, replacement by Neal H. Bettigole

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