For the construction of a mosaic flooring, a concrete base is prepared and over it lime surkhi mortar is spread to a depth of 5 to 8 cm and leveled. The area over which this is spread is restricted to a suitable working period so that the mortar may not get dried before the floor is finished.
Mosaic flooring consists of:
1. Concrete layer
2. A layer of cementing material of about 3mm thick (consisting 2 : 1 : 1 ratio of lime and marble and pozzolana material).
3. After 4 hours, the laying of marble pieces or tiles is started.
After starting marble pieces a stone roller about 30 cm dia, 45 to 6 cm long is passed over the surface gently, water being sprinkled over now and then to work up the cement between the marble pieces.
The surface thus prepared is allowed to set for 24 hours and is rubbed with a pumice stone 20 cm x 25 cm x 7 cm fitted to a long wooden handle. The object is to polish the surface and to make it smooth and level. The floor is dried for about two weeks before use.