Silas,
Off topic, but I helped build a concrete canoe in college also for an ASCE
conference, It looked like something from the Flintstones, but it proudly
bore the name "Ridgid Member" on the bow....
Greg Morris, P.E.
-----Original Message-----
From: Silas Collier <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED] <[EMAIL PROTECTED]>
Date: Thursday, May 11, 2000 7:53 PM
Subject: [RCSE] Re: Soaring V1 #1200 (epoxy to epoxy)
>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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