Concrete, one of the most widely used building materials in the world, is made from a combination of readily available basic materials including cement, water, rock (coarse aggregate), sand (fine aggregate), admixtures, and in some cases, fibers or other additions. The proper proportioning of these components is an art based on fundamental materials science whether it is concrete for the construction of a residential pool or mass concrete for a dam. Through various practices such as material testing, CA has the industry expertise required to perfect concrete durability and prevent issues such as corrosion of concrete reinforcement, alkali-silica reaction, and more. CA is a leader in the use of supplementary cementitious materials such as fly ash, a by-product of the combustion of coal, granulated blast furnace slag, and silica fume on the production of high quality, high performance, and environmentally friendly concrete. CA has been involved in projects for the development and use of emerging concrete technologies for LEED ® Green Building, self-consolidating concrete, architectural concrete, previous concrete, lightweight concrete, and sustainable concrete using innovative blends of materials. Structural steel, wood, masonry, fiber composites, polymers, and solid waste by-products are also among the building materials in the construction industry for which CA has offered expertise. CA also offers expertise in all aspect of pavement materials, to include soils, stabilized soils, unbound or bound aggregates, and asphalt concrete, CA’s understanding of these materials properties has contributed to the design, analysis, implementation, and modeling of durable concrete structures and pavements. Over a wide range of projects, CA’s experience has proven excellence and exemplary performance.