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Re: [SEAOC] Epoxy-Coated Rebar vs. Silica-Flume Concrete

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        Your question in regards to Silica Fume vs epoxy coated rebar 
        depends on several factors (nothing is ever easy?!).  Silica 
        Fume is a very fine pozzolan, about 100 times smaller than 
        cement.  It produces a very dense and impermeable concrete.  
        This helps in preventing the ingress of chlorides which will 
        corrode the rebar and it also helps reduce the effects of 
        sulfates which attacks the concrete itself.  Beware that Silica 
        Fume reduces the available bleed water so special precautions 
        must be taken during curing.
        Epoxy coated rebar, IF DONE CORRECTLY, will prevent the rebar 
        from chloride corrosion.  However, there is a lot of debate on 
        how good is the average installation.  If your project is in the 
        U.S. (preferably in a large city) then the expertise on 
        fabrication and installation probably exists.  If your project 
        is overseas then this might not be a good idea.  Note that epoxy 
        coated rebar will do nothing for the sulfate attack so you will 
        probably want to use type II or V cement.
        Thomas Hunt, S.E.

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Subject: [SEAOC] Epoxy-Coated Rebar vs. Silica-Flume Concrete
Author:  seaoc::(SEAOCAA) at ~FABRIK
Date:    3/2/96 11:22 AM

From: seaoc(--nospam--at)
Date: Sat, Mar 2, 1996 11:22 AM
Subject: [SEAOC] Epoxy-Coated Rebar vs. Silica-Flume Concrete
To: seaoc
I would like opinions as to which of the above would be more
cost-effective in a harsh (i.e. marine) environment.


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From: billp(--nospam--at) (Bill Polhemus)
Newsgroups: SEAOC.Mailing.List
To: seaoc(--nospam--at)
Subject: [SEAOC] Epoxy-Coated Rebar vs. Silica-Flume Concrete
Date: Sat, 02 Mar 1996 13:22:16 -0600
Organization: Chez Polhemus-Rivas, Katy, Texas
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