Bay Concrete Re-Pour

[gshick]

Hello,
This winter, the temperature did not get above freezing for several days in a row leaving several inches of ice in our bays. At one of our locations, water got under the cement bay floors in several of the bays and tore it to bits. It literally looks like a groundhog got under there in big chunks some as bad as 8 ft by 10 ft. The concrete was not poured properly when the car wash was built (probably mid 1980's) and we have patched some areas in the past but this is probably beyond a patch repair. Wondering if anyone has had to re-pour bays and have any advice in regards to expansion joints, angle slope to the pit, as well as 4 ft concrete aprons at the entrance and exit to the bays. Thanks!!

 

[sparkey]

Do you run floor heat? If the floor heat is on water shouldn't be freezing on the floor or under the floor?

 

[gshick]

This location does not have floor heat...may be interested in adding it if we have to bust up the old floors.

 

[mac]

Bite the bullet and tear up and repour.

 

[DiamondWash]

I second that motion, you'll have to post before and after pics.

 

[Semi-retired]

I'm looking at a complete redo including pit's.
Would you use a pre made tank or poured concrete?

 

[chaz]

Poured concrete. My builder years ago...talked me into prefab pits....though architect had speced poured pits. No floor heat close to pit edge means ice damming in winter plus always filling in the transport slots to keep crap out.

 

[soapy]

I have done a repour once. Make sure that when rebar is laid down that it is anchored into the good remaining concrete by drilling into it. Rebar on at least 2 foot centers but I prefer on 1 foot centers. Standard concrete here is 3500lb mix but I stepped it up to 4500 LBs. and added fiber mesh to the concrete. If you are doing poured pits make the mud section as large as you can for obvious reasons.