huangyhg

water tight precast joint
i am designing a multi-story residential unit development and our client wishes to use precast concrete walls for the basement inlieu of cast in situ walls. the precast panels will be cast on site. does anyone know of standard joint details for walls/ walls to footings, bearing in mind the walls will be subject to a 15 foot head of water pressure?
any comments would be greatly appreciated
i would suggest a waterproof membrane on the outside of the precast. the panel joints should be caulded too, but i doubt they would standup alone to that kind of water pressure for any period near the life of the building.
i would talk to manufacturers like w.r. grace; meadows; and sonoborn for material recommendations and specs. also, contact a couple of your local waterproofing contractors and talk the problem over with them.
i would first warn the client that any wall installed against 15 ft. of head would be difficult to make water tight. precast will be even more difficult.
if you're stuck, for non-moving joints we like to use sikadur combiflex (
we have specified a water swelling waterstop made of a hydrophilic polymer, made by volclay, in such situations and have received no complaints. we have also used a reinforced coating called reemat made by marcus corporation, also with no known problems.
thanks for the tips, i will look into those products.

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