Selecting the right expansion board for an expansion joint
Selecting the right expansion board for an expansion joint
(OP)
Here is the situation, due to the project requirements I need an expansion board that is flexible and excellent as a water seal. The board would be used for an expansion joint between a concrete wall and a wall cap in order to prevent water from infiltrating behind the wall and freezing and thereby creating problems. Basically we need something better than typical wood/plastic expansion boards. Any suggestions?
Also what would be the procedure to install these? Would a sealant be also needed on top of the board to ensure a better seal?






RE: Selecting the right expansion board for an expansion joint
The only thing I can think of is PVC water stop,but that is not going to help much with expansion.
I have used selfleveling sealants in slab joints where I have expansion board,and it has worked well.The only trouble found is to make sure contractor does the job carefully.
RE: Selecting the right expansion board for an expansion joint
what about a drainage design to remove the water from behind the wall?
RE: Selecting the right expansion board for an expansion joint
The waterstops (PVC) will be used along the other construction/expansion joint but not for the expansion joint along the wall cap- wall connection.
RE: Selecting the right expansion board for an expansion joint
RE: Selecting the right expansion board for an expansion joint
Is the cap PRECAST,CAST IN PLACE,or what?
Also I am looking at some data on foam expansion,will get back to you on pressure,and life span.
RE: Selecting the right expansion board for an expansion joint
37ed that would be good info to have. Feel free to get back to me at anytime. You might want to check out a product called Ceramar by W.R. Meadows.
RE: Selecting the right expansion board for an expansion joint
http://www.cetco.com/bmg/home.htm
In my opinion, bentonite waterproofing panels and water stop are the best available - and this is for applications such as cast-in-place underground industrial structures (water table at ground level) and electric utility cooling tower basins.
www.SlideRuleEra.net
RE: Selecting the right expansion board for an expansion joint
RE: Selecting the right expansion board for an expansion joint
RE: Selecting the right expansion board for an expansion joint
I think it would be very effective if placed over the backer rod and expansion board as the first layer of defense against moisture.
RE: Selecting the right expansion board for an expansion joint
RE: Selecting the right expansion board for an expansion joint
PVC water stops are definitely an option but maybe a good quality, flexible expansion board/joint sealant system can cut it for the wall cap/wall connection.