Why Does Brand-New Concrete Crack So Fast?

By History of Simple Things

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Why does concrete crack even when it’s brand new? You might think freshly poured concrete should be flawless and nearly indestructible—but cracks can appear within days, or sometimes even hours. In this video, we explore the surprising science and history behind concrete cracking. From shrinkage and evaporation to temperature changes, excess water, soil movement, and control joints, discover why cracking can happen even when concrete is properly installed. We’ll also look at how ancient civilizations used concrete, why modern concrete behaves the way it does, and why engineers don't always try to eliminate cracks—but instead control where they happen. ⏱️ Timestamps 0:03 – Why Does New Concrete Crack? 0:54 – The Ancient History of Concrete 1:52 – What Concrete Is Actually Made Of 2:31 – Why Concrete Shrinks 3:18 – Plastic Shrinkage Cracks 4:35 – Temperature and Concrete Cracking 4:49 – Why Control Joints Exist 5:19 – How Too Much Water Causes Problems 5:51 – The Ground Beneath Concre

Tags: #HistoryOfEverydayItems, #HowItsMade, #BehindTheProduct, #SimpleThingsExplained, #EverydayInnovations, #ManufacturingProcesses, #FromRawToFinished, #TheMakingOf, #EverydayWonders, #ExploringOrigins, #UncoveringCreation, #TheStoryBehind, #CraftingEssentials, #OriginsOfInnovation, #DiscoveryOfCreation