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

By Neal H. Bettigole

This e-book is a complete reference for the overview, trying out, choice, and exam of appropriate layout standards and possible choices for bridge decks, which seem within the AASHTO/LRFD layout requirements. vital demanding situations to civil engineers, resembling existence cycle rate research, and constructability, fairly as regarding conserving site visitors in the course of deck substitute, are mentioned. The authors speak about why using average 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 larger cognizance to deck choice and layout sooner or later. for instance, so much destiny bridge initiatives will contain rehabilitation or replacement\=which makes site visitors upkeep a big issue\=and existence cycle fee research is readily changing into necessary within the U.S. This advisor is meant for use in the course of the improvement of any development undertaking concerning bridges

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The latter is said to be less expensive than membrane systems used elsewhere while adequate for moisture protection. Epoxy-coated reinforcing steel is widely used in the top reinforcing and often in the bottom mat as well. Where decks are not topped with asphalt or other coating, the standard protection is a 50-50 mixture of linseed oil and kerosene or mineral spirits. About 99% of all bridge decks in the Texas system are concrete, although a few experimental bridges have been constructed with decks designed according to the Ontario empirical method.

Remove the existing asphalt or concrete wearing course. 2. Remove all concrete as specified (deep removal) and expose the reinforcing bars so they can be blast cleaned. This removes grease, dirt, concrete, mortar, and loose rust. 3. Place bonding grout on all surfaces; place concrete around the exposed rebars to the level of the surrounding concrete. 4. Apply a protective membrane. 5. Apply the overlay, either asphalt or concrete, to match the highway pavement. Several specialized concretes are available, including high-density, latex-modified, and microsilica concretes.

Apply the overlay, either asphalt or concrete, to match the highway pavement. Several specialized concretes are available, including high-density, latex-modified, and microsilica concretes. 6. Make required transverse saw cuts to provide skid resistance to a concrete wearing course. As with any type of construction, concrete decks should be competently maintained to achieve the lowest life-cycle cost possible. Periodic spraying with a mixture of boiled linseed oil and mineral spirits has been done, particularly in Canada.

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