Swimming Pool Remod - shotcrete joint? 1

[EngineerGeneral]

Hi guys, I'm currently helping a client to deepen his pool. The shell of the pool is about 6-8in shotcrete. If we cut the bottom out and dig deeper, then add a new bottom, how would you make the joint between the new and existing shotcrete? Any experience to share will be appreciated.

 

[Tomfh]

How much deeper are you going? How much of the pool area?

I recently repaired a large hole in the bottom of my 40 year old concrete pool during a remodel. The hole went right thru the shell.

I used epoxy to bond the old concrete to the new, which is a fairly common approach. It worked fairly well. Paint it on liberally to your old surface, and place your new concrete.

Leave your old steel hanging out if you can, rather than drilling in new steel.

 

[EngineerGeneral]

Thank you. It's just a backyard pool and it's new. Just finished concrete without any coating yet. The client wants to make it 8" deeper. So I'm thinking to knock out the bottom and dig deeper, then shot new shotcrete. In addition to the bonding agent, I'm thinking a detail with waterstop. I would like to hear any advice on this.

Leave some old steel is a good idea.

 

[JoelTXCive]

Only 8" inches? That's a lot of work.

What about a curb around the top and a nice deck surround to hide it? You would have to raise up the skimmer basket and maybe add a entrance step....but it might be easier?

 

[BAretired]

To deepen the pool by 8" is not only a lot of work, it's asking for a heap of trouble. Don't do it! Joel's idea of adding a curb around the top would be a much better alternative, it seems to me.

BA