I spent a whole day, mixing concrete, pouring, smoothing out and mixing some more. I've been filling in trenches where I have installed a new drain, waste, vent system -- about 40 feet in length in total.
Now, I was very careful to mix well with (about) a 6 inch slump (sort of average.) I filled the trenches and gave it as much of a crown as surface tension would allow. It creamed up nicely but as soon as the moisture was absorbed, it shrank below the surface of the floor by as much as 1/16th inch. For half of the trench, it will be hidden by a floor or a wall. the other half will be painted and this is where I'm having problems.
How can I level out the pour? Can I use thinset or some other self leveling thin mix? Any other suggestions?
I spent a whole day, mixing concrete, pouring, smoothing out and mixing some more.
Hard work, aint it ??
Sorry, I couldn't resist.
I put a thin layer of concrete to smooth out some rough steps. Its been 3 or 4 years now, outdoors, and its holding up fine. No flaking at all. Probably helped that the base material was rough. I don't recall exactly what product it was, but I think it was from Rona, and was intended to be used thin. Pretty sure I used the white adhesion promter too (not sure what the proper name is, I call it milk).