|
|
From: Bob Johnson (no email)
Date: Tue Apr 03 2001 - 17:06:19 EDT
There is an additive used by some tank manufacturers that is a silicate of
some sort. The only tool to use is diamondcoated. The reason for its use is
two fold: 1. absorb heat from the catalyzation process thus allowing faster
laminate buildup and 2. it is cheaper than resin so it is used as a filler.
Bob Johnson
Searunner 37 Hallelujah!
-----Original Message-----
From:
[mailto:]On Behalf Of Steve
Smith
Sent: Sunday, April 01, 2001 12:02 AM
To: Russell
Cc:
Subject: Re: lv-ab: resinated sand core?
This is amazing. I have been serving customers mesing about with boats for
thirty years and have never heard of such a thing. Would it not be very
dense, a compromise between a solid GRP hull and a ferrocement? I assume
you
cannot drill a hole in it without a carbide drill bit......?
There is something called "foundry sand" which is sand coated with a resin
and
then heated to fuse the sand grains together. It was used for making
flower
pots thirty years ago because it allowed air to pass, being porous, but not
liquid water. Unfortunately, the resin broke down from the long-term
moisture
and/or bacterial/fungal exposure, and the pots all leaked after a few
years.......
Russell wrote:
> Hello all,
>
> A fiberglass boat I am looking at apparently has a "resinated sand" cored
> hull, has anyone ever heard of this before? I certainly have not. If
anyone
> has, could someone tell me pros/cons of it? I would imagine it would add
a
> good deal of strength to the hull, but would it absorb moisture and
> delaminate badly the way wood cored glass boats would? I would think if
> this core was a good thing you might see it in common use?
>
> If it helps, this is on a 1980 swedish built boat.
>
> Russell
>
>
___________________________________________________________________________
> || The Live-Aboard List : send a "subscribe" or "unsubscribe" request
||
> || in body of message to:
||
-- Steve Smith e mail at: www.woodrestoration.com www.fiveyearclear.com www.smithandcompany.org, and especially www.smithandcompany.org/glulam.html ___________________________________________________________________________ || The Live-Aboard List : send a "subscribe" or "unsubscribe" request || || in body of message to: || ___________________________________________________________________________ || The Live-Aboard List : send a "subscribe" or "unsubscribe" request || || in body of message to: ||
|