Plaza decks suffer from an identity crisis. They have multiple definitions and names—are they roofs? Floors? Driveways? Courtyards? Vegetative decks? Located over parking areas, arcades, or water storage reservoirs, they may be large (the size of a city block) or small (just a square meter or two).
What can be done to help specifiers and contractors create the most stable, durable, and resilient concrete structures possible? This challenge inspired the industry professionals responsible for updating an American Concrete Institute (ACI) standard over the summer.
Carbon dioxide (CO2) is a naturally occurring gas byproduct of every organism that breathes oxygen; it is found deep in the oceans and high in the atmosphere. It is also vitally important—without CO2, photosynthesis would not be possible, and life would not exist.
Specification writers must now consider more performance criteria than ever before. As the list of new products continues to grow, design professionals must determine how to reach more stringent targets for indoor environmental quality and energy consumption.
Moisture presence in concrete slabs can cause problems for all types of floors, including carpeting, wood, stone, poured polymeric, and resilient finish. Too much moisture can cause floorcoverings to cup, buckle, blister, and discolor, and these problems can occur days, months, or years after installation.
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