Cement Cement Cement is a material that hardens and sticks to other materials to hold them together. Portland cement is a common kind, and made from quicklime (heated limestone) and clay. Cement is used to make concrete and mortar. This short article can be made longer. You can help Wikipedia by adding to it. Wikimedia Commons has media related to Cement. Retrieved from "https://simple.wikipedia.org/w/index.php?title=Cement&oldid=8257717"