🏛️ 為什麼兩千年前的古羅馬建築能自動修復裂縫？

Why can Ancient Roman buildings heal their own cracks?

🧠 好奇問題：為什麼兩千年前建造的古羅馬建築，出現裂縫時居然能夠自己縫合修復？

🎧 這一集在聊什麼：這一集要帶大家一起認識古羅馬混凝土的秘密！ 科學家發現，古羅馬人在製作混凝土時加入生石灰進行熱混合，形成微小的石灰碎屑。 當建築物出現裂縫且水分滲入時，石灰碎屑會重新溶解並結晶，自動填滿裂縫。

👦👧 適合誰收聽：適合國小生收聽，也很適合爸媽陪孩子一起聽、一起討論。

🎙️ 節目介紹：這裡是《你想學什麼呢？》，一個用簡單、有趣的方式，陪孩子探索世界各種為什麼的 Podcast。

🧠 Curiosity question:How can ancient Roman buildings made two thousand years ago heal their own cracks when rainwater gets in?

🎧 What this episode is about:In this episode, we explore the mystery behind ancient Roman concrete. Scientists discovered that an ancient hot-mixing process left small lime clasts inside the concrete. When cracks form and water enters, these lime pieces dissolve and refill the gaps, letting the concrete repair itself over time.

👦👧 Who this episode is for:This episode is suitable for elementary school children and is great for parents to listen together with their kids.

🎙️ About the Podcast:What Do You Want to Learn? is a kid-friendly educational podcast that uses simple and engaging explanations to explore everyday “why” questions with curious young listeners.