i used cement to seal large gaps in the house, but in an upside down suface where i used lots of it on, touching it makes parts of the surface turn into powder and chunks fall off. I did it rudimentary with my hands and a smoothed it as best as i could then but still looks and feels messy. The holes are filled and its solid, the surface though is powdery.
You used way too much water and worked with it way too long. You can expect for it to crack, crumble and fall out of the holes rather soon.
My advice is to try experimenting with just 1 area that needs work. Generally, if you use less water, pack it in tight, it will be stronger more dense. If you have the time patience, you will get the right mixture gain experience. A little internet will help. Then move on to the rest of the areas that need work.
Cement never sets up properly when you play with it with your hands like it's clay. If you ever watched a mason, they never play with it like that. then too, you probably made the mix too thin and that causes it to set up even slower. You really should have got a pro to do it...please do it the next time, which will not be very long. Papaw
no mention about the use of sand in the cement powder .... it needs the sand to work properly and if it is overhead then it may never the solution you are seeking== don't touch and hope that it dries in a few days ... if it does get solid then it is t
