Tord,
I've worked with epoxy a lot and it will stick well to old epoxy. You may
need to sand off the amine blush first, though some epoxies are made not to
blush (I've used Aluzine surfboard resin from Fiberglass Hawaii for kayaks
and wings). It also helps to get it rough first. Your concrete boat sounds
like an interesting project. I was heavily involve in a concrete canoe
competition in college. Our best was a 20 foot (6.1 m) long canoe that
weighed a bit over 40 pounds (18.14 kg), which isn't far from a good
fiberglass boat the same size. I now work as an engineer for a construction
company and we bond new concrete to old with epoxy all the time.
-Silas-
> Date: Thu, 11 May 2000 19:09:41 +0000 (GMT)
> From: Tord <[EMAIL PROTECTED]>
> To: [EMAIL PROTECTED]
> Cc: RCSE <[EMAIL PROTECTED]>
> Subject: Re: Re: My Towhook ...
> Message-ID: <[EMAIL PROTECTED]>
>
> Epoxy only clings to epoxy perfectly if it's the same age and mix,
> and have cured together :-)!
>
> I once was involved in a concrete boat project where the keel was
> molded in one piece separately - 100% concrete and scrap iron,
> and reinforcement irons as per normal concrete building. Then we
> were about fourty guys who did the hull during one long night -
> a lot of manual labour, I tell you!
>
> Anyway, the new concrete would not stick to the pre-moulded concrete,
> so one has to use a special epoxy to glue the joint and for the
> joint to hold!
>
> Yours,
>
> Tord,
> Sweden
>
> --
> If reply difficulties - use [EMAIL PROTECTED]
>
> Tord S. Eriksson, Ovralidsg.25:5, S-422 47 Hisings Backa, Sweden
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