The Machine That Pumped Concrete 621 Meters Straight Up

Pumping wet concrete more than half a kilometer straight up against gravity is one of construction's most quietly dangerous engineering problems — pipes have blown apart, pumps have failed, and workers have been hurt getting this wrong. On September 22nd, 2015, Chinese contractors pumped concrete 621 meters vertically to cap the core of Tianjin's Goldin Finance 117 tower, using equipment built by Sany — a record that still stands today. In this video, we cover everything about how this actually works — the mechanical principle that makes concrete pumping possible at all, the physics fighting against every meter of height, the specific pump technology that solved the clogging and blowout problem, and why Sany's equipment now sits inside 80 percent of China's tallest buildings.


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