I want to build up a short dam of maybe half an inch in height, to control where water is flowing. The water flows as a small, steady trickle. Right now it fans across a large-ish area. I'd like to concentrate its flow to a specific area.
What kind of cement or mortar should I use to direct the flow? I was thinking of hydraulic cement, but I wanted to check first. The area is wet. I want to make sure the new cement sticks to the existing thin cement floor in the cellar.
I also have some quick set mortar powder on hand, as well as some resurfacing cement. If none of the products I have on hand is the right thing, I can buy something new.
I don't care about the aesthetics in this case.