Concrete has well earned its reputation as one of the most durable of all building and paving materials. In fact, the ancient Romans constructed buildings out of concrete that people can still visit today. Few other building materials can boast such compelling evidence of their strength and longevity.
Despite the universal role of concrete in the modern world, many people fail to understand the basic composition of concrete. Concrete consists of three principal ingredients: water, crushed stone aggregate, and cement. This article takes a closer look at the last of these ingredients, outlining three interesting yet little-known facts about cement.










