Smooth Rubbed Finish Concrete

Concrete that will not be exposed in the completed structure shall be any form finish as specified in section 03 11 00 concrete forming and aci 301 for rough form finish 2.

Smooth rubbed finish concrete.

This will be used for cleaning off your tools. How to rub out new concrete walls step 1. Fill one bucket halfway with water. Grind smooth any drips or bumps of concrete left on the wall.

So the operator can apply water and grind concrete simultaneously. You want the surface to be as flat and clean as. 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. In the earlier version of this specification aci 301 89 a smooth form finish did not require rubbing.

Mix a slurry that is three parts portland. A grout cleaned finish is similar to what many contractors call a sack rubbed finish. What are the differences in appearance and cost for smooth rubbed grout cleaned and cork float finishes for formed concrete surfaces. A smooth rubbed finish should be applied no later than the day after form removal.

Finishing process is conducted by slow speed grinding disc wheel at the same time applying water. After the concrete is laid in the formwork and leveled the trowel is used to smooth and fine level the surface of concrete. 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. Trowel finish is the most common and popular finish of concrete used for major types of applications.

The water and the rubbing action brings up a cement paste which makes concrete very smooth plaster like surface. The surface just before finishing. The water plus the rubbing action brings up a cement paste which results in a very smooth plaster like surface. Under aci 301 96 therefore the specifier who wants a smooth off the form finish untouched by rubbing on concrete exposed to public view will have to call this out as a special finish.

No grout is used other than cement paste that is drawn from the concrete by the rubbing process. The wetted surface is rubbed with carborundum brick or other abrasive until uniform color and texture are achieved. Wet rubbing is accomplished on green concrete by a slow speed grinding wheel or disc at the same time applying water.