Waterstops

[BigH]

Wondering if anyone has any experience or knows a contact to discuss waterstops for a high dam. The use would be in conjunction with RCC concrete pad on top of which will be several hundred metres of Dam Core material. Issues include potential deformation, aggressive water (gypsum, among others) . . . Looking for pros and cons of various types - metallic and non-metallic. Thanks.

 

[ATSE]

I have had good success with the Sika / Greenstreak technical sales reps, which are usually engineers or contractors and tend to be very knowledgeable about their product line. However, this is usually for plain vanilla concrete joints for hydraulic structures.
Not sure about your specialized application - sounds pretty serious.

 

[JoelTXCive]

These people are located in California, but ship everywhere I think....

https://www.jpspecialties.com/waterstop-products/

According to their website, they will also do a zoom meeting with you to discuss waterstop and their products.

And, they have a free book on Waterstop. Google... "The Little Book of Waterstop PDF Version by Poole"

 

[dik]

Can you do a hydrophillic type waterstop in a keyway so the loads can transfer through on the face? with PVC vertical waterstops? or something of that ilk? My preference for PVC ones is the ones that are on the face and not those on the interior... also don't know about the durability of PVC waterstops in whatever environment. For little 'stops' my preference is bentonite rod.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

 

[r13]

Is RCC means "roller compact concrete"?, or..?

 

[BigH]

r13 - yes RCC is ROller Compacted Concrete. I remember reading years ago in USACE about the amountof head that each type of waterstop would be rated for. Don't remember anything where there would be up to 300 m of head. Thanks for the links/references.

 

[GC_Hopi]

I would recommend talking with vendors like Earth Shield by JP Specialties and Sika Green Streak. Sika was able to provide me with test information previously. Also reading the USBR and USACE engineering manuals on waterstops may be of use but as you mentioned your application may require special testing.

Here is a snip of the Sika manual they have pressures in the 175 ft to 225 ft range.

 

[GammaBuilding]

There is always confusion about RCC(Reinforced concrete) and RCC( Roller compacted Concrete). But RCC is being used just for Reinforced Concrete..

 

[r13]

RCC dams often employ standard twelve-inch polyvinylchloride or polyethylene waterstops, which run perpendicular to the lift joint and to block the passage of water.

I think you would like to go over this paper. Link

 

[LittleInch]

THREE HUNDRED METRES of water????

i think a water stop is not really what you're after and I suspect you would need more than one.

I think you're really looking at something like a pipeline anchor flange which is then bolted into a structure embedded in the concrete.

You've gone way beyond what I would have thought a simple "water stop" is going to do for you.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[r13]

I guess the water stop is applied to the interface of the RCC base pad and the concrete core above to stop the seepage. How thick is the RCC base, and how you control the seepage through the RCC lifts?