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Fwd: Re: Concrete in Salt Water Environment[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: wai(--nospam--at)euken.com
- Subject: Fwd: Re: Concrete in Salt Water Environment
- From: rlewis(--nospam--at)techteam.org (Richard Lewis)
- Date: 05 Aug 1997 15:28:35 GMT
I recommend using "plain" rebar and installing a cathodic protection system to neutralize the ion flow. This ion flow is the true culprit of corrosion. Regards, Bill Allen ---------- > From: Lynn Howard <lhoward(--nospam--at)silcom.com> > To: seaoc(--nospam--at)seaoc.org > Subject: Concrete in Salt Water Environment > Date: Sunday, March 23, 1997 6:49 AM > > Dear List Members: > We are involved in designing some structures that are for use in a > research laboratory for marine environment (salt water). This is here > in the US, and is in an area where freeze-thaw cycle is not an issue > (Santa Barbara). > I am in a quandary as to what to do with the reinforcing steel. We are > going to use type V concrete, cover all steel with 2.5" minimum cover, > use a strength of concrete in the range of 5000 to 7000 psi, and use a > low W/C ratio (around .45) > We are also going to be using a carefully selected source and gradation > for our aggregate, to get a high density, low permeable, low reactive > mix. We are considering using some of the admixtures that increase the > density of the mix. > > From what I have read, the issue listed above are pretty much agreed > upon by most professional in the design of concrete for a seawater > environment. However, as I read studies and articles, there is a big > disagreement on what should be done with the rebar. Epoxy coating, > galvanizing, other treatments to rebar, and just using normal untreated > steel seem to have their supporters and critics. It seems that plain > old steel without any treatment may be the way to go, if you use a good > high density mix with plenty of cover over the rebar. I am leaning in > that direction, but the Owner (State of Calif.) seems to think that we > should do something to the steel, and they do not feel comfortable > without some kind of treatment to the steel. > > If someone who has had experience in this area could comment on what > their views are, I would really appreciate it. I have read many studies > and articles in Concrete publications (ACI, etc.), but there does not > seem to be a consensus on this issue. > > Thanks > > Lynn --- Internet Message Header Follows --- Received: from server1.seaoc.org (bqe.com [126.96.36.199]) by host1.texramp.net (8.8.5/8.8.5) with SMTP id KAA29600 for <rlewis(--nospam--at)techteam.org>; Sun, 23 Mar 1997 10:03:39 -0600 (CST) Received: from darius.concentric.net by server1.seaoc.org (NTList 3.02.10) id na010517; Sun, 23 Mar 1997 07:49:48 -0800 Received: from cliff.cris.com (cliff.cris.com [188.8.131.52]) by darius.concentric.net (8.8.5/(97/03/20 3.25)) id KAA01668; Sun, 23 Mar 1997 10:47:06 -0500 (EST) [1-800-745-2747 The Concentric Network] Errors-To: <ballense(--nospam--at)concentric.net> Received: from ALLENDESIGNS (61006d0012la.concentric.net [184.108.40.206]) by cliff.cris.com (8.8.5) id KAA08777; Sun, 23 Mar 1997 10:47:04 -0500 (EST) Message-Id: <199703231547.KAA08777(--nospam--at)cliff.cris.com> From: "Bill Allen, S.E." <ballense(--nospam--at)concentric.net> To: <seaoc(--nospam--at)seaoc.org> Subject: Re: Concrete in Salt Water Environment Date: Sun, 23 Mar 1997 07:38:08 -0800 X-MSMail-Priority: Normal X-Priority: 3 X-Mailer: Microsoft Internet Mail 4.70.1155 MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Reply-To: seaoc(--nospam--at)seaoc.org Error-To: seaoc-ad(--nospam--at)seaoc.org X-Loop: seaoc(--nospam--at)seaoc.org X-Info: [SEAOC] Owner: seaoc-ad(--nospam--at)seaoc.org X-POP3-Rcpt: seaoc-ad(--nospam--at)seaoc.org X-Sender: seaoc-ad(--nospam--at)seaoc.org Precedence: list X-ListMember: rlewis(--nospam--at)techteam.org [seaoc(--nospam--at)seaoc.org] __________________________________________________ Richard Lewis, P.E. Missionary TECH Team rlewis(--nospam--at)techteam.org The service mission like-minded Christian organizations may turn to for technical assistance and know-how.
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