Technology Explained on Instagram: "Follow @explaining.tech to learn everything about technology one post at a time 🧠⚙️ Making concrete blocks by hand relies on the principle of mechanical compaction to eliminate air pockets. A worker fills a metal mold with a “dry-mix” concrete, which has just enough water to hold its shape but isn’t liquid. By using a heavy hand-tamper or a manual lever press, they apply immense pressure to the mixture, forcing the aggregate particles to lock together. This p