<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12pt">the concrete yacht submarine is at the bottom of Attersee, Austria, in 50 m depth and is a turist atraction now. As far as Wilfried the builder told me it sank because some buglars damaged the hatch and after a long time rain came in and one day it sank. No body was on the boat, because it was in a kind of winter pause.<br>In youtube there are several videos showing the boat. Search under Atterse u boot.<br>Best wishes<br>Juergen<br><div><span><br></span></div><div style="display: block;" class="yahoo_quoted"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12pt;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12pt;"> <div dir="ltr"> <font face="Arial" size="2"> Jim
Rudholm <jimrudholm@gmail.com> schrieb am 12:45 Montag, 14.April 2014:<br> </font> </div> <div class="y_msg_container"><div id="yiv9369727326"><div><div dir="ltr"> Here are a few photos of my party barge, 26' x 8', built in 1968. Also some photos of Martin Iron's Fibersteel mold and a hull in West Sacramento, CA. I had returned from two years with the Navy in Japan and had picked up several cargo parachutes at a surplus store. These made for an interesting air inflated building, they were treated with a plastic preservative coating, but the UV eventually deteriorated the nylon.<div>
<br clear="none"></div><div><a rel="nofollow" shape="rect" target="_blank" href="https://plus.google.com/photos/110939032764686627267/albums/5294994060907444593?banner=pwa">https://plus.google.com/photos/110939032764686627267/albums/5294994060907444593?banner=pwa</a></div><div>
<br clear="none"></div><div>JimR<br clear="none"><div><br clear="none"></div><div><br clear="none"></div></div></div><div class="yiv9369727326yqt1070538398" id="yiv9369727326yqt99580"><div class="yiv9369727326gmail_extra"><br clear="none"><br clear="none"><div class="yiv9369727326gmail_quote">On Mon, Apr 14, 2014 at 7:21 AM, Jim Rudholm <span dir="ltr"><<a rel="nofollow" shape="rect" ymailto="mailto:jimrudholm@gmail.com" target="_blank" href="mailto:jimrudholm@gmail.com">jimrudholm@gmail.com</a>></span> wrote:<br clear="none">
<blockquote class="yiv9369727326gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div dir="ltr">Plenty of photos at:<div><a rel="nofollow" shape="rect" target="_blank" href="http://concretesubmarine.com/">concretesubmarine.com</a></div>
</div><div class="yiv9369727326HOEnZb"><div class="yiv9369727326h5"><div class="yiv9369727326gmail_extra"><br clear="none"><br clear="none"><div class="yiv9369727326gmail_quote">On Mon, Apr 14, 2014 at 6:27 AM, Marc de Piolenc <span dir="ltr"><<a rel="nofollow" shape="rect" ymailto="mailto:piolenc@archivale.com" target="_blank" href="mailto:piolenc@archivale.com">piolenc@archivale.com</a>></span> wrote:<br clear="none">
<blockquote class="yiv9369727326gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Fascinating. I think that counts as water pollution in Europe...<br clear="none">
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Marc<br clear="none">
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On 4/14/2014 6:52 PM, Joe Perkel wrote:<br clear="none">
<blockquote class="yiv9369727326gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Marc,<br clear="none">
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Strictly from my foggy memory, but I believe it was scuttled.<br clear="none">
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Joe<br clear="none">
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Sent from Yahoo Mail for iPad <<a rel="nofollow" shape="rect" target="_blank" href="http://overview.mail.yahoo.com/?.src=iOS">http://overview.mail.yahoo.<u></u>com?.src=iOS</a>><br clear="none">
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*From: * Marc de Piolenc <<a rel="nofollow" shape="rect" ymailto="mailto:piolenc@archivale.com" target="_blank" href="mailto:piolenc@archivale.com">piolenc@archivale.com</a>>;<br clear="none">
*To: * <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.<u></u>org</a>>;<br clear="none">
*Subject: * Re: [PSUBS-MAILIST] concrete<br clear="none">
*Sent: * Mon, Apr 14, 2014 3:30:48 AM<br clear="none">
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Really - it sank? Mind you, it did have walls 6 inches thick and very<br clear="none">
little freeboard. Any lives lost?<br clear="none">
<br clear="none">
Marc<br clear="none">
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On 4/13/2014 10:35 PM, Joe Perkel wrote:<br clear="none">
> It seems to me that with reduced cost materials there is a tendency to<br clear="none">
> go big and unwieldy.<br clear="none">
> Wasn't that the case with that one fellows concrete sub yacht? It's on<br clear="none">
> the bottom of a lake somewhere if I recall.<br clear="none">
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> Joe<br clear="none">
><br clear="none">
> Sent from Yahoo Mail for iPad <<a rel="nofollow" shape="rect" target="_blank" href="http://overview.mail.yahoo.com/?.src=iOS">http://overview.mail.yahoo.<u></u>com?.src=iOS</a>><br clear="none">
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> ------------------------------<u></u>------------------------------<u></u>------------<br clear="none">
> *From: * Sean T. Stevenson <<a rel="nofollow" shape="rect" ymailto="mailto:cast55@telus.net" target="_blank" href="mailto:cast55@telus.net">cast55@telus.net</a> <javascript:return>>;<br clear="none">
> *To: * Personal Submersibles General Discussion<br clear="none">
> <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.<u></u>org</a> <javascript:return>>;<br clear="none">
> *Subject: * Re: [PSUBS-MAILIST] concrete<br clear="none">
> *Sent: * Sun, Apr 13, 2014 6:16:35 AM<br clear="none">
><br clear="none">
> I ran that same 6' diameter 4" shell, but using an ultra high-performace<br clear="none">
> concrete with no aggregate, but with steel fiber reinforcement. Working<br clear="none">
> pressure came out to more than 1700 m. That said, while the compressive<br clear="none">
> strength of this stuff is 160 MPa, the tensile is only 8 MPa, so you<br clear="none">
> absolutely have to avoid putting this stuff in tension. Sphere may not<br clear="none">
> be an issue, but a cylindrical hull would probably require some sort of<br clear="none">
> pretensioned reinforcement. Results:<br clear="none">
><br clear="none">
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> On 2014-04-12 21:52, Marc de Piolenc wrote:<br clear="none">
>> I had forgotten about the lubricant/plasticizer properties of fly ash.<br clear="none">
>><br clear="none">
>> Marc<br clear="none">
>><br clear="none">
>> On 4/13/2014 10:55 AM, hank pronk wrote:<br clear="none">
>>> Marc,<br clear="none">
>>> We don't get segregation at all, when pumping it we fill the wall and<br clear="none">
>>> then let it flow, I call it "ride the wave"<br clear="none">
>>> Also pumping the concrete helps hold the concrete together, it stays<br clear="none">
>>> in a cylinder shape until it hits the wave. We must use fly ash<br clear="none">
>>> because the aggregate and sand is washed so well there are no fines<br clear="none">
>>> left. The jagged sand won't flow through the hose. Fly ash is like<br clear="none">
>>> little ball bearings and makes it flow through the hose. These are<br clear="none">
>>> the things that make me think a mold is the way to go. Four inches<br clear="none">
>>> wall thickness would be a breeze for this mix.<br clear="none">
>>> That makes sense that the rock is a cheap filler. I would still use<br clear="none">
>>> the pea gravel mix, I have made a test panel and I drove my bob-cat<br clear="none">
>>> over a 2in thick 4by4 panel with no breakage. I know, very<br clear="none">
>>> scientific .lol<br clear="none">
>>><br clear="none">
>>> Hank<br clear="none">
>>> ------------------------------<u></u>--------------<br clear="none">
>>> On Sat, 4/12/14, Marc de Piolenc <<a rel="nofollow" shape="rect" ymailto="mailto:piolenc@archivale.com" target="_blank" href="mailto:piolenc@archivale.com">piolenc@archivale.com</a><br clear="none">
<javascript:return>> wrote:<br clear="none">
>>><br clear="none">
>>> Subject: Re: [PSUBS-MAILIST] concrete<br clear="none">
>>> To: <a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.<u></u>org</a> <javascript:return><br clear="none">
>>> Received: Saturday, April 12, 2014, 10:40 PM<br clear="none">
>>><br clear="none">
>>> Actually, all else being equal, using<br clear="none">
>>> only fine aggregate (sand) will give a stronger mix. Coarse<br clear="none">
>>> aggregate is needed mainly to make the mix affordable - as<br clear="none">
>>> bulk filler, in other words - and also for decorative effect<br clear="none">
>>> in some applications where the fresh concrete is brushed to<br clear="none">
>>> show off the aggregate.<br clear="none">
>>><br clear="none">
>>> You have to be careful, in very high-strength applications,<br clear="none">
>>> to make sure that the coarse aggregate is chemically inert<br clear="none">
>>> with respect to the cement matrix. Some siliceous aggregate<br clear="none">
>>> will weaken the concrete in the long term by reacting slowly<br clear="none">
>>> with the matrix long after cure.<br clear="none">
>>><br clear="none">
>>> Confusingly, very fine silica incorporated in the form of<br clear="none">
>>> fly ash, rice husk ash or silica fume can give a<br clear="none">
>>> super-HIGH-strength mix. The reason for the effect is that<br clear="none">
>>> the very fine silica reacts with the alkali formed DURING<br clear="none">
>>> cure and actually strengthens the cement matrix.<br clear="none">
>>> Unfortunately, much of the fly-ash and volcanic ash cement<br clear="none">
>>> on the market is too coarsely ground to harness this<br clear="none">
>>> effect.<br clear="none">
>>><br clear="none">
>>> Best,<br clear="none">
>>> Marc de Piolenc<br clear="none">
>>> Ferrocement freak<br clear="none">
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><br clear="none">
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