Rubbed Concrete Wall Finishes

Apply sandblasted finish to exposed concrete surfaces where indicated.

Rubbed concrete wall finishes.

Wet rubbing is accomplished on green concrete by a slow speed grinding wheel or disc at the same time applying water. Rubbed finishes smooth rubbed no later than the day following formwork removal wet surface and rub it with an abrasive such as a carborundum brick until a uniform color and texture are produced. The best way to apply tung oil is actually with 400 grit sandpaper. The water plus the rubbing action brings up a cement paste which results in a very smooth plaster like surface.

Sacking produced a finish for cast in place concrete surfaces after fins from oils and bond breakers had been removed by filling in pits and air holes by dampening the surface and rub bing mortar all over it. Sand the surface and wipe away all the sawdust with a tack cloth. However stone rubbing has to be done soon after the forms are removed within a day or two at the latest while enough moisture is still in the concrete to create a paste that will fill the bug holes. When finish is not indicated provide smooth form finish as specified above.

Applying hand rubbed finishes to wood. The salt finish concrete surface is obtained by inserting coarse rock salt crystals using rollers on the freshly placed concrete surface and washing it off with streams of water after the concrete is set. The surfaces shall then be thoroughly dampened and rubbed with a no. Fill one bucket halfway with water.

Then before the mortar dried the sur face would be rubbed with a wad of clean dry burlap to remove surplus mortar and to fill voids. 16 carborundum stone or equal abrasive to create a uniform surface paste. How to rub out new concrete walls step 1. Pour a generous amount of tung oil directly onto the surface.

You want the surface to be as flat and clean as. This will be used for cleaning off your tools. This finish gives a decorative rough subtle texture and skid resistance to plain or colored concrete. Blasting operations and requirements.

Immediately after removing the forms form ties shall be broken back a minimum of three quarters inch from the surface honeycomb voids and other surface defects grouted. Conform to aci 301. Grind smooth any drips or bumps of concrete left on the wall. Cleveland concrete contractor ron simonetti says a smooth rubbed finish done with an abrasive stone should look the same as a grout cleaned sacked finish.