The detailed specification of mosaic flooring or terrazzo flooring is specifying the method of preparation, the proportion of materials, method of execution of work, and the qualities, quantity of materials.
Here are the step by step detailed specifications of mosaic flooring-
Detailed Specification Of Mosaic Flooring
The mosaic flooring or terrazzo flooring consists of two layers a bottom and top layer.
The bottom layer of mosaic flooring is usually 20 to 25 mm thick consisting of cement concrete proportion 1:2:4.
The top layer is usually 6 mm thick consisting of cement, mixed marble chips in the proportion of 1:3/2.
The sand must be free from dust, dirt, and the sand is properly cleaned before use and the stone chips shall be hard of 12 mm size.
The cement is fresh and must be conforming to the I.S. code of specifications and the marble chips size maximum 3 mm and minimum 1.5 mm.
2- Preparation Of Cement Concrete For Bottom Layer
First, the cement and sand are mixed thoroughly, and then this cement and sand mixture is mixed with stone chips and after mixing these cement, sand, and stone chips the required water is slowly added into the mixture and mixed until a uniform plastic mix is obtained.
3- Laying Of Bottom Layer
Before laying cement concrete the base shall be made rough and cleaned and properly watered.
The whole base area is divided into panels of uniform size and each panels area shall not be exceeding 2 m2 and the inside and outside lengths also not exceed 2 meters and 1.25 meters in length respectively.
Before laying cement concrete on the whole base area 2 kg per m2 cement slurry is applied.
After applied cement slurry the concrete is laid within the panel and compacted with wooden thapies and smooth by using wooden floats.
4- Preparation Of Material For Top layer
The cement and the marble chips are mixed thoroughly with proper proportion and the water is added gradually and mixed until a uniform plastic mix is obtained.
5- Laying Of Top Layer
The laying of the top layer must be carried out within two hours of laying the bottom layer of cement concrete.
The top layer of marble chips and cement is laid, and the surface level perfectly with the help of float and trowel.
After two hours of the laying top layer, the surface is covered with wet bags, and pour water on the bags from time to time so that the bags always remain in the wet condition and the bags are left for two days.
6- Grinding And Polishing
The cement on the surface is removed by rubbing with sandstone blocks and a neat cement wash is given on the surface and left for six days.
After six-day, the surface is rubbed with carborundum stones until the entire surface shows a uniform granular appearance.
After the final rubbing, the surface is washed with soap and then with clean water.
Finally, the oxalic acid powder is rubbed on the surface when the surface is absolutely dry.
The mosaic flooring or terrazzo flooring is measured in the square meter.