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[SEAOC] Precast Prestressed Concrete in a Marine Environment[Subject Prev][Subject Next][Thread Prev][Thread Next]
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- Subject: [SEAOC] Precast Prestressed Concrete in a Marine Environment
- From: poly(--nospam--at)flash.net (Bill Polhemus)
- Date: Fri, 08 Nov 1996 20:05:46 -0600
- Newsgroups: SEAOC.Mailing.List
We are looking at building a RO-RO wharf using Precast prestressed box beams of the type you see in bridge design. The concern has been raised that this would not be an appropriate application of this type construction, due to the corrosive nature of said environment. Primarily, the concerns are these: 1) Any cracking would expose prestressing strands to the harshly corrosive environment. 2) Prestressing strands are "small" and thus would represent more of a potential for catastrophic failure should corrosion be present. 3) Wharves of this type take a "pounding" and this is not the kind of loading situation that prestressed construction handles well. I would like some other input. If you could, please address the concerns above, and also answer these questions for me: 1) Have you any experience with the use of precast prestressed concrete in a marine (or at least, estuarine) environment? 2) Do you have any feel for the life expectancy of such structures? 3) Are there any measures you would recommend, such as materials or additives to the concrete, to counter the anticipated "harsh marine environment?" Thanks in advance for any and all input. ...
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