In 2006, the Strategic Development Council of the ACI Foundation (established by the American Concrete Institute) recognized the need to set minimum requirements for strength, serviceability, and durability for existing structures.
Composite steel assemblies are an efficient and popular structural option for floor construction. Figure 1 shows a typical assembly, consisting of a steel beam, metal deck, concrete slab, and shear connectors. The composite action between the steel beam and concrete provided by shear connectors creates the composite properties that make the system a very stiff and strong structural element.
The American Concrete Institute (ACI) selected the Museum of European and Mediterranean Civilizations (MuCEM) in Marseille, France, for its 2015 Concrete Construction Excellence Award. The award is given to a project demonstrating excellence in concrete innovation and technology, standing out above all others.
The American Society for Testing and Materials (ASTM) Subcommittee E06.21 has suggested a new test method to help minimize the confusion in quantifying texture value at the concrete surface. WK49335, Test Method for Concrete Micro Surface Texture will be used to measure concrete surfaces with a contact stylus instrument—a profilometer.
The U.S. construction industry is shifting perspectives from traditional building toward a green, more sustainable design sensibility. This approach includes building concrete structures that will last an appropriate lifespan with minimal maintenance and repairs—and this necessitates careful attention paid to the waterproofing strategies chosen.