To create a level (with water flowing gradient) you mix the cement with sand.
For the bonding of the screed surface with the tile, you mix the cement with water with "susu"

just tell them that you want the adhesive for bonding of the tiles. They will know what you want.

BTW, you need to roughen the cemented floor for good bonding. Else you will be picking up loose pieces....

This post has been edited by kelvyn: Dec 9 2011, 04:10 PM

u mentioned that you are planning to put tiles onto your cemented corridor what...
Since the cemented floor is smooth, you will need to make the rough so that it will bond with the tiles.

easier to use a chisel with a hammer.

A rotary hammer with hammer function would not be cheap.
As it just for a corridor, would not be expecting a large floor space.
If it is really a large floor space, will need so tiling skill. Else the outcome will be

hahaha