Anyone in the construction industry knows the importance of concrete. That’s why this composite material is used to build skyscrapers, sidewalks and bridges, houses and driveways, highways, and many other things around the world. After setting and forming, concrete is strong enough to resist some of the greatest natural forces as a durable material. However, concrete is “plastic” in that it can be molded and shaped into almost any shape before it hardens. When it hardens, the quality of concrete depends on its properties as a mixture.