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Caretakers of outdoor monuments, sculptures and high-value architectural metalwork face formidable preservation challenges. Durable, low-maintenance coatings are needed that provide longer-lasting protection against corrosion and degradation, while being safe for the environment. We describe work done in collaboration with conservators at the Philadelphia Museum of Art, and Portland State University, to develop water-based fluoropolymer coatings that meet the critical needs of the conservation and architectural communities.
In restoration cleaning of historic masonry, you usually know based on contaminants and building fabric what kind of cleaner will be effective on a dirty building. You’ll use one type of restoration cleaner for atmospheric staining, and another for biological soiling. You’ll have an idea, going in, what kind of restoration cleaner to at least try. Not having that kind of information, in my experience, is what makes paint removal from historic – or just old – masonry the most challenging branch of restoration cleaning.
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The polyurea technology is not new to pipelining work, with earlier basic applications dating back more than 15 years. Much of this work was either performed by hand spraying (large diameter pipe) or simple robotic systems for individual joint sections of pipe. Continued work over the years has proven that in-place pipelines can be commercially completed as well. More recent work has even shown that in addition to long, straight runs, robotic developments have allowed for lining both 45° and 90° radius bends in the pipeline system.
Explains why concrete floors need protective treatments, identifies two main categories of protective treatments, and recommends appropriate protective treatments based on purposes and finishes of concrete floors.