Architectural Rubbed Concrete Finish

The new aci 301 10 specifications for structural concrete lays out the requirements for surface finish 1 0 2 0 and 3 0 and unspecified as cast finishes.

Architectural rubbed concrete finish.

After the panel is removed from the form the retarder is removed by sandblasting. The end result is a panel with coarse aggregate exposed to the degree called for by the design. Definition this finish is achieved by casting against a form surface that has been painted with retarder which retards the set of the concrete at its surface. Immediately after concrete has been placed in forms concrete finishers utilize a screed to level out the concrete surface.

Available in gray or white. 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. I recommend the following when placing architectural concrete. After you have formed and poured your new concrete walls you will need to apply a finish to the surface to help seal it and to make it more visually appealing.

The most basic type of concrete finish is a smooth surface created through the use of screeds and trowels. Concrete finish covers color and texture variations in poured concrete with a uniform finish eliminating the need for costly rubbing. A popular easy to apply and long lasting finish is called rubbing. Precast architectural concrete section 03 45 00.

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. It s like paying for a hamburger and wanting the cheese for free. Essentially the requirements for the. Architectural concrete finishes can cost up to three times more than a class c finish.

Provides a uniform texture and architectural finish. Where concrete surfaces will receive architectural finishes such as resilient floor coverings or paint or membrane waterproofing membrane forming curing compound shall not leave a coating or residue that will impair bond of adhesives paints and coatings with concrete. Part 3 execution 3 01 repair of surface defects. When the bids hit they always accept the class c but hold the concrete contractor to the class a guidelines.