Hi Eric,
Yes, we definitely have some advice for you, if you are considering
epoxy injection.
First, the crack must be as dry as possible--even though most
epoxies will cure in the presence of water (sometimes even underwater!),
most crack injection epoxies are designed for application to dry
substrates. What happens if it's wet? --Poor adhesion is the usual
result. If your crack is actively leaking water, or it's impossible to
dry out, I would suggest a urethane waterstop, rather than an epoxy.
Secondly, is the crack moving? If so, welding it together with an
epoxy will simply cause the granite to crack somewhere else. If it is
moving, the best you can hope for is a flexible caulk--of course, this
won't result in a structural repair, as I assume this is what you want.
Better solution: find out what's allowing it to move, and stop it!
Thirdly, depending on the crack dimensions (width and depth), you
may need special techniques to mask the surface so the epoxy doesn't
leak back out, and special equipment to inject deeply.
Lastly, ambient conditions (temperature, cure speed requirements,
etc.) will dictate which product is recommended.
We would be happy to discuss these specific issues, and recommend
one of our epoxies for this project. Please call us toll-free at
1-800-425-2214, and ask for me or Paul Klees.
Hope to heaar from you soon!
Mike Beckmann
Bonstone Materials Corporation
Hammarberg, Eric wrote:
>Folks,
>
>Does anyone have opinions on granite seawall crack injection repairs using
>dispersed hydrated lime or epoxy?
>
>The repairs are on both horizontal and vertical surfaces, at grade (above
>the high tide level), brackish water, New York City.
>
>Thanks,
>
>Eric Hammarberg
>Associate Director of Preservation
>Associate
>LZA Technology
>641 Avenue of the Americas
>New York, NY 10011-2014
>Telephone: 917.661.8176 (Direct)
>Mobile: 917.439.3537
>Fax: 917.661.8177 (Direct)
>email: [log in to unmask]
>
>--
>To terminate puerile preservation prattling among pals and the
>uncoffee-ed, or to change your settings, go to:
><http://maelstrom.stjohns.edu/archives/bullamanka-pinheads.html>
>
>
--
To terminate puerile preservation prattling among pals and the
uncoffee-ed, or to change your settings, go to:
<http://maelstrom.stjohns.edu/archives/bullamanka-pinheads.html>
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