Concrete pad drainage

[DeeKay]

Hey guys, I have quite a few low spots on a concrete pad that turn into a skating rink in the winter. I’m wanting to make some small trenches in the concrete to help them drain out of the walkways. I bought a diamond wheel for my 7” angle grinder and went to town on a few spots, but this is going to take forever and probably going to take a few more $60 diamond wheels.

Anyone know of a better method or better tool?


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[doctordirt]

Rent walk behind diamond concrete saw and 2 blades. Double blades up and as you cut slowly lower blades. That will give you some pitch to get rid of the water.

 

[Armorpoxy]

Doing this by hand is no small task. Suggest maybe contacting a floor grinding company or concrete company that has crack grinders and they can make short order of this.

 

[DeeKay]

I was trying to avoid contractors. This is at one of my work sites so there's a whole bunch of safety training and paperwork I have to go through with new contractors. Plus all the insurance qualifications and stuff.
I might look into renting one of those crack grinders, sounds like it will work better than what I'm trying to do with the angle grinder.
thanks!

 

[sps4runner]

Not sure how far you have to cut but I did something similar in my garage with (I think) a diamond blade but using a 7 1/4 circular saw (cheapo that I didn't care if it got destroyed - still works).
I did a shallow cut just to direct water of about 18' on 3 sides. Wasn't too bad. I also used it to cut the pad just outside the threshold as it sloped away unevenly & I wanted a straight edge to put pavers against. This was 24' long in 2 passes I think to get through the depth.
For all that I only used 1 or MAYBE 2 blades (I think only 1 but it was pretty done by the end).
Not this one but this type:
https://www.lowes.com/pd/DEWALT-Dia...ViICGCh0tuQJQEAQYASABEgJVmvD_BwE&gclsrc=aw.ds

 

[DeeKay]

Not sure how far you have to cut but I did something similar in my garage with (I think) a diamond blade but using a 7 1/4 circular saw (cheapo that I didn't care if it got destroyed - still works).
I did a shallow cut just to direct water of about 18' on 3 sides. Wasn't too bad. I also used it to cut the pad just outside the threshold as it sloped away unevenly & I wanted a straight edge to put pavers against. This was 24' long in 2 passes I think to get through the depth.
For all that I only used 1 or MAYBE 2 blades (I think only 1 but it was pretty done by the end).
Not this one but this type:
https://www.lowes.com/pd/DEWALT-Dia...ViICGCh0tuQJQEAQYASABEgJVmvD_BwE&gclsrc=aw.ds

Total I've probably got close to 100 linear feet to cut.

That might actually be the way to go though, I can pick up two HF circular saws and four of those blades for less than another two diamond wheels for my angle grinder. Plus a set of knee pads haha