After the panel is removed from the form the retarder is removed by sandblasting.
Architectural rubbed concrete finish.
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.
A popular easy to apply and long lasting finish is called rubbing.
The end result is a panel with coarse aggregate exposed to the degree called for by the design.
The most basic type of concrete finish is a smooth surface created through the use of screeds and trowels.
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 concrete finishes can cost up to three times more than a class c finish.
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.
Essentially the requirements for the.
When the bids hit they always accept the class c but hold the concrete contractor to the class a guidelines.
Precast architectural concrete section 03 45 00.
It s like paying for a hamburger and wanting the cheese for free.
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.
Provides a uniform texture and architectural finish.
Rub out new concrete walls for added protection.
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.
1 8 to 3 8 portland cement based.
Available in gray or white.
Part 3 execution 3 01 repair of surface defects.
Immediately after concrete has been placed in forms concrete finishers utilize a screed to level out the concrete surface.