For fixing tiles using sand and cement, follow the instructions given below:
A. Use cement and sand mortar in the ratio of 1:3. Add some water to create consistent paste. DO NOT USE NEAT CEMENT FOR FIXING TILES
B. Once the mixing has been completed, do not add more water and use the mixture with in one hour.
C. Soak the tiles in clean water at least 30 minutes before fixing.
D. Remove the tiles from the water and allow them to drain to ensure that there is no film of water on the tile surface.
E. Apply a 15-20 mm layer of bedding material evenly spread over an area of 1 square meter at a time on the surface of the area. Apply a fine slurry to the back of the tile to ensure proper and full bedding. Press gently for even adherence at the back of the tile.
DO NOT USE IRON HAMMER, ALWAYS USE WOODEN HAMMER TO PRESS THE TILE

 

Source:- H & R Johnson India