How to repair these gunite cracks?

[poolguy968]

Hi I started a new pool build this year and the gunite shell was completed in late February. After the gunite was done, I watered it everyday for the next month or so until about April.

Then I had to deal with some other things and as a result the pool construction itself went into hiatus for about about half a year and it was left empty and dry the whole summer without any more watering.

Now I'm planning to finish the pool. The only step left is to do the plastering. However I inspected the gunite closely today and found that there are now a lot of cracks in the gunite. I have posted pictures below. I am wondering if these cracks may have developed because I haven't really watered the gunite at all in the last three or four months?

There are some wider cracks below the water line tile on the walls and then some pretty long thinner cracks along the floor of the pool that are like 15 feet long or so. I added some blue tape on the floor of the pool to mark the path of those cracks and also posted some close up pictures too.

Do you guys think this is serious and needs some special repair? I would ideally like to address it before the plaster is installed. Thanks!

 

[ajw22]

None of those cracks look structural.

I would proceed with plastering and the plaster will fill in the cracks.

@AQUA~HOLICS may have thoughts.

 

[AQUA~HOLICS]

Appears to be typical shrinkage cracking.
Possibly from a number of factors, lack of pre dampening of the soil, temp of rebar, early curing as only a few.
Shrinkage cracking may cause reflective cracking in the plaster.

 

[poolguy968]

Gotcha, would you have any recommendations for how to patch or address these cracks? I’d definitely like to do what I can before installing plaster to prevent any future issues like leaks or reflective cracking.

 

[AQUA~HOLICS]

Every plaster company has their own way of treating the situation prior to application, contact them and advise of what they will be working with upon arrival. I would recommend that you take no action and allow the plaster company to correct the situation.

 

[SacPoolPros]

As a Gunite company owner these cracks are just surface shrinkage cracks completely harmless all concrete cracks you'll get similar ones on your decking plaster will fill it those are to small to even accept filler especially when vertical proceed to plaster no worries at all.

 

[poolguy968]

Thanks! I think my main concern is that the cracks on the bottom of the pool are very long and go in multiple directions. Like I measured the lengths of the cracks and some cracks on the pool bottom run continuously for over 13 feet long. Would that sort of length be cause for concern?

I also identified some additional areas of cracking that are a bit wider than the ones I captured in my initial post. I've attached some more close up pictures.

In general, I'm wondering if there are some guidelines/threshold for the acceptable length and width of a crack in the gunite? Where under those widths/lengths its usually not an issue but when the dimension of the crack exceeds those limits then it would be a cause for concern?