*In industrial building, hard wearing surface is sometimes required. This can be achieved by applying granolithic finish over the concrete topping.
*Granolithic finish consists of rich concrete made with very hard and tough quality coarse aggregate (such as granite, basalt, quartzite etc.) graded from 13 to 240 no. I.S. sieve. 
*The concrete mix proportion varies from 1 : 1 : 2 to 1 : 1 : 3 for heavy duty floors to 1 : 2 : 3 for public buildings.
*The thickness of finish may be minimum 25 mm when laid monolithically with the top concrete, and 35 mm when laid over hardened surface. 
*However, for public buildings such as schools, hospitals etc. the thickness of the finish may be 13 mm to 20 mm using small size aggregate.