What Exactly Is Concrete?

What Exactly Is Concrete?  Join us today as we learn about the not-so-modern building material--concrete. Sources: https://www.concrete.org/topicsinconcrete/topicdetail/history%20of%20concrete?search=history%20of%20concrete https://www.concretenetwork.com/concrete-history/ https://www.nachi.org/history-of-concrete.htm Send us listener mail! Send an audio message: anchor.fm/inquisikids-daily/message Send an email: [email protected]