Ad blocker interference detected!
Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers
Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.
According to the newly-regenerated Romana II, cement was the combination of limestone and clay with water. Concrete was made with gravel and cement. The Fourth Doctor essentially agreed, and noted that it was the indication of civilisation on the mysterious planet on which they'd landed. (TV: Destiny of the Daleks)