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Re: Epoxy (et al) Injection

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Try www.pieri.com



----- Original Message -----
From: <COEngineer(--nospam--at)aol.com>
To: <rrollo(--nospam--at)team-psc.com>; <seaint(--nospam--at)seaint.org>
Sent: 04 Kasým 1999 Perþembe 20:05
Subject: Re: Epoxy (et al) Injection


>
> In a message dated 11/3/99 3:29:38 PM, rrollo(--nospam--at)TEAM-PSC.com writes:
>
> << 1) is it just me or does our industry misuse/overuse the term epoxy and
has
> that become the Kleenex equivalent in the facial tissue realm or is epoxy
> really the correct "generic" term for all of these 2 component adhesive
> materials.
>
> 2) having used "epoxy" satisfactorily in the past for similar
applications,
> should i consider using some of these other materials (with all due
> parameters (tensile and compressive strengths, viscosity appropriate for
> crack width, etc) or shall i go with old standby.
> 3) what are pros and cons of other materials in your experiences.
> 4) are there any other commonly available mfrs so that i don't get too
> proprietary with my specification.
>
> There are certainly other materials that could or should be used for
> injection depending on the application.  The term epoxy is misused
> frequently.  I see it almost every day when an engineer specifies a Hilti
> "epoxy" anchor that is actually a vinylester resin or methyl methacrelate.
> For applications involving water, I don't think the chemistry of
vinylesters
> is very good, and epoxy satisfactory.  There are products available (can't
> remember which ones right now) that are reactive with water which seems
like
> a good feature especially if you are injection against head pressure which
> can be difficult.
>
> Ourselves as well as Sika and Master Builders seem to supply many projects
on
> the west coast, although we do not recommend injecting against a constant
> head or water flow.
>
> Howard Silverman, PE
> Covert Operations, Inc.
> Long Beach, CA
> (800) 827-7229
> www.covertoperations.com
>  >>
>
>
>