A properly constructed concrete floor should be dust free under normal use. Dusts in floors can be reduced by the application of a hardener, or by waxing, or by painting it with a solution of oil spirit. For such application, raw or boiled linseed oil mixed with an equal amount of turpentine has been found to be effective. Painting with epoxy, acrylic or chlorinated rubber base is also used.
Wax polishing with proprietary polish is also popularly used. This polish may be made at site by mixing a 25% solution of melted bees wax in turpentine together with pigment at the rate of 60% by weight of bees wax. The wax is applied on the floor which hardens after 12 hours and the surface is sprinkled with French chalk and polished with dry cloth. About 200 gm of bees wax shall cover an area of 10 m2.
If the floor has to be roughened, it is usually done by washing the floor with dilute hydrochloric acid. The dilute acid is applied at the rate of 0.3 l/m2 of floor area. The acid is left for 15 minutes and then brushed. Then the floor is thoroughly cleaned with water. If need be three successive applications may be given.
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