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Re: Other: concrete kayak
By:Mike Savage
Date: 2/26/2012, 11:19 am
In Response To: Re: Other: concrete kayak (Bill Hamm)

: I think before I even gave a slight thought to the design, I'd be
: doing some serious experimenting with materials. Concrete is a
: pretty strong material but thin sections aren't well understood
: I'd bet. I think I'd look at fiberglass reinforced concrete and
: see if you can make that work. Agregates (sp?) will be a
: challenge I'd think.

: Bill H.

Hi Bill, et al,
Alu mesh, similar to chicken wire, could be used as reinforcement. Fibreglass works quite well too. And I've seen light weight aggregates uses, one was that perl used for stove insulation. The finer stuff that doesn't absorb any moisture.
For thinner section reinforced cement/concrete (conccrete to me has gravel in it), the plastered item has to be kept damp so that it cures rather than dries. And plasticizer has to be used, that helps when plastering, (it sort of 'gels' the mix a bit so it doesn't slump) and makes a more flexible material.
Portland or marine type cement would be needed.

Mike Savage
South West Cork

Messages In This Thread

Other: concrete kayak
gilad naor -- 2/21/2012, 10:22 am
Re: Other: concrete kayak
Robert N Pruden -- 2/21/2012, 12:45 pm
Re: Other: concrete kayak
Matthias -- 2/22/2012, 2:25 am
Re: Other: concrete kayak
gilad naor -- 2/22/2012, 3:26 am
Re: Other: concrete kayak
Dan Caouette (CSFW) -- 2/22/2012, 8:26 am
Re: Other: concrete kayak
Bill Hamm -- 2/26/2012, 2:31 am
Re: Other: concrete kayak
Mike Savage -- 2/26/2012, 11:19 am
Re: Other: concrete kayak
ancient kayaker -- 2/26/2012, 12:43 pm
Re: Other: concrete kayak
Bill Hamm -- 2/28/2012, 2:41 am
Re: Other: concrete kayak
Björn Thomasson -- 2/28/2012, 4:01 pm
Re: Other: concrete kayak
Bill Hamm -- 2/29/2012, 1:57 am
Re: Other: concrete kayak
Björn Thomasson -- 2/29/2012, 2:29 am
Re: Other: concrete kayak
Bill Hamm -- 2/29/2012, 1:59 am
Re: Other: concrete kayak *PIC*
Björn Thomasson -- 2/29/2012, 2:51 am
Re: Other: concrete kayak
Etienne Muller -- 2/29/2012, 3:23 am
Re: Other: concrete kayak
Björn Thomasson -- 2/29/2012, 4:03 am
Re: Other: concrete kayak
Bill Hamm -- 3/1/2012, 1:51 am
Re: Other: concrete kayak
Paul G. Jacobson -- 3/7/2012, 6:10 pm
Re: Other: concrete kayak
Rob Macks/Laughing Loon CC&K -- 3/7/2012, 8:57 pm
Re: Other: concrete kayak
Bill Hamm -- 3/8/2012, 2:09 am
Re: concrete or newspaper kayaks
Paul G. Jacobson -- 3/8/2012, 2:53 am
Re: concrete or newspaper kayaks
Jim Ham -- 3/9/2012, 12:13 am
Re: concrete or newspaper kayaks
Ulrik Schou -- 3/9/2012, 1:31 am
Re: concrete or newspaper kayaks
Björn Thomasson -- 3/9/2012, 1:11 pm
Re: Other: concrete kayak
John Messinger -- 3/1/2012, 5:44 pm
Re: Other: concrete kayak
Mike Savage -- 3/2/2012, 9:45 am
Re: Other: concrete kayak
Bill Hamm -- 3/4/2012, 2:01 am
Re: Other: concrete kayak
John Messinger -- 3/4/2012, 7:34 am
Re: Other: concrete kayak
Paul G. Jacobson -- 3/8/2012, 2:40 am
Re: Other: concrete kayak
Kevin McAtee -- 3/8/2012, 3:57 pm
Re: Other: concrete kayak
Mike Savage -- 3/9/2012, 4:49 am
Re: Other: concrete kayak
Robert N Pruden -- 3/13/2012, 6:02 pm
Re: Other: concrete kayak
John Messinger -- 3/14/2012, 9:46 am
Re: Other: concrete kayak
Robert N Pruden -- 3/14/2012, 9:58 am
Re: Other: concrete kayak
Cole -- 3/9/2012, 9:21 am