Concrete Cap/thin layer to fix flow problems

[cr1973]

There exists a 3 ft wide concrete rim around one of our stand pipes. However, this concrete isn't graded very well and there are plenty of ponds due to the concrete sloping TOWARD the stand pipe. In some spots the concrete is broken up with loose exposed stone due to the standing water.

I've heard of a technique where you can pour a thin 2" layer over the existing concrete. This would take care of the ugly concrete/grading problems. The boss doesn't want to use asphalt.

Anyone familiar with this? How is this new concrete layer bonded to the existing? Pins/rebar at all?

 

[BobPE]

If you are in a cold (freezing) regeion, forget the concrete methos, they will fail due to freeze thaw. You may have people tell you they wont, but they will. The standing water is a mess, I will agree. It happens to a lot of tanks. I have ground a bevel into the top before and sealed it afterwards with a waterproofing agent. Depending on where your rebar is, this may be an option.

Good luck and let us know...

BobPE

 

[cr1973]

Here in WI, it definitely is a freezing climate. But, a contractor told me they've done it before and it's been 5 years with no cracking. So, we'll see. I might give it a shot, considering the cheap cost.

 

[cr1973]

Just found out, this is called "whitetopping", which is usally 2" to 4" thick. Some highway off ramps have had this done and they are apparently holding up well.