After the panel is removed from the form the retarder is removed by sandblasting.
Architectural rubbed concrete finish.
When the bids hit they always accept the class c but hold the concrete contractor to the class a guidelines.
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.
1 8 to 3 8 portland cement based.
The most basic type of concrete finish is a smooth surface created through the use of screeds and trowels.
I recommend the following when placing architectural concrete.
A popular easy to apply and long lasting finish is called rubbing.
Immediately after concrete has been placed in forms concrete finishers utilize a screed to level out the concrete surface.
Architectural concrete finishes can cost up to three times more than a class c finish.
The end result is a panel with coarse aggregate exposed to the degree called for by the design.
Part 3 execution 3 01 repair of surface defects.
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.
Provides a uniform texture and architectural finish.
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.
Essentially the requirements for the.
Rub out new concrete walls for added protection.
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.
Concrete finish covers color and texture variations in poured concrete with a uniform finish eliminating the need for costly rubbing.
Precast architectural concrete section 03 45 00.
It s like paying for a hamburger and wanting the cheese for free.
The exterior skin designed as a rainscreen facade consists of 25 000 square feet of architectural precast tracery and ornamental panels gracefully integrated with brick masonry.