M Mats #16 Moderator · Västernorrland · 11 483 posts 24 Jun 2008 at 10:00 PM Mats Moderator Västernorrland 11,483 posts 24 Jun 2008 at 10:00 PM #16 a huge difference between a form that is tight enough for viscous concrete and one that is watertight. Should suffice with the best recipe found on the back of a cement sack I think. Dad built some underwater parts for the summer cottage and it held
a huge difference between a form that is tight enough for viscous concrete and one that is watertight. Should suffice with the best recipe found on the back of a cement sack I think. Dad built some underwater parts for the summer cottage and it held
J jakim #17 Member · 1 300 posts 3 Jul 2008 at 10:31 AM jakim Member 1,300 posts 3 Jul 2008 at 10:31 AM #17 important to use freshwater for the concrete mix no matter what you do
G Gonate #18 Member · stockholm · 56 posts 3 Jul 2008 at 5:52 PM Gonate Member stockholm 56 posts 3 Jul 2008 at 5:52 PM #18 what feels like a problem if water gets in (inevitable) will the concrete still collapse within the next few days - years?
what feels like a problem if water gets in (inevitable) will the concrete still collapse within the next few days - years?
J jakim #19 Member · 1 300 posts 4 Jul 2008 at 1:29 PM jakim Member 1,300 posts 4 Jul 2008 at 1:29 PM #19 No, I don't think it's a problem if the concrete starts to cure even if saltwater reaches the outside of the casting. Edit: But I still think it would be best to wait until low tide next spring and then do the casting. Last edited: Jul 4, 2008
No, I don't think it's a problem if the concrete starts to cure even if saltwater reaches the outside of the casting. Edit: But I still think it would be best to wait until low tide next spring and then do the casting.
