Recent content by Concreteman

Not true Shotcrete is concrete ACI recommends 7 days water cure -

Re: Damaged Spa (Photos): Recommended Course Of Action For F The first picture looks like there is problems on the left of the spa wall also - the beam in the spa looks like a possible concern looking close it's a Gunite ( dry process pool - which is fine ) you would need to sound the areas in...

Re: Damaged Spa (Photos): Recommended Course Of Action For F Looks like an old Dry process Shotcrete pool - you will need to set up a complete repair plan , It can be repaired but proper prep is key please take more pictures of the area - also looks like bond beam has some areas of concern...

You can pull the forms - 1-2 days after it is shot - water cure compete form and pool side - I would do a complete 7 day water cure including the beam - then install tile - coping etc (Remember no rebound should be used in the structure) check video Swimming pool section Chris www.shotcrete.us

What do the samples look like - are they cores and did you get pictures - the contractor should tell you how is going repair the side - a good bond is needed so it will not delaminate latter - the contractor is trying to run over you , stick by your guns - you have the California Building Code...

Thanks Chris

Great article one of the best written - Ron is a great engineer and a good friend Thanks for the input Chris www.shotcrete.us

I understand - Have him review the California Building Code Shotcrete -Section 1913A 1) Shotcrete shall not be less than 3000 psi 2) Rebound shall be removed and not used -Section 1913A.6 Rebound http://www.shotcrete.us/uploads/Shocret ... on_PDF.pdf Chris www.shotcrete.us

No it would need to be sounded with a hammer - then chipped with chipping gun/ jack hammer - if rebound is found it needs to be removed -in some cause down to the soil if needed - a clean chipping joint can be re-shoot and is as strong as if was done the day of the shoot - kinda think like a...

please read my prior post I would call the contractor and tell him you have concerns about the cracks and soundness of the structure - and you would like to take cores in possible problem area's - I would suggest min 3-4 3'' cores - the purpose of the cores is to check 1) see how deep the...

The picture looks like they used the Concrete spoils and rebound in the cove and bottom - the crack is mostly in the flash cost - the problem is the shell under the crack may have voids for the use of the rebound- a couple of cores will show you what you have Good Luck Chris...

No the shell can be saved - if it has rebound in the coves it can be chipped out and re-shot - the bond between a prepared joint and Shotcrete is excellent this would take some work - but would save the shell - What is the PSI requirements for the pool shell - a core will tell you what you...

Sorry to see the crack - if they used rebound in the cove and used a flash coat on top of the rebound -which it looks like they may have done from the pictures The thin section on top dried out faster than the full thickness,creating shrinkage cracks. What may be a bigger problem is under the...

Re: curing shotcrete - is this a problem? PICTURES ADDED Usually the water cure is seven days - Concrete cures for 100 yrs - more water will not hurt it as to the Hammer use any size you want -you will not hurt it - sound the wall first then sound the cove and floor -they should sound...

Re: curing shotcrete - is this a problem? PICTURES ADDED The Shotcrete Shell looks good - behind the skimmer looks good also - if your worried about rebound in the cove and floor ,sound it with a hammer -if it sound's hollow it is most likely REBOUND Chris www.shotcrete.us